# DAIDISIKE — Industrial Sensors & Machine Safety (daidisensor.com) > Foshan DAIDISIKE Optoelectronics Technology Co., Ltd. manufactures safety light curtains, measuring light curtains, press/press-brake protection, 2D TOF LiDAR, safety door locks, safety relays, proximity sensors, photoelectric sensors, laser switches, color mark sensors, fiber optic sensors and relay modules. Factory-direct from Foshan, Guangdong, China. OEM/ODM supported. Contact: WhatsApp +86 152 1890 9599. ## Product categories - [relay-module](https://www.daidisensor.com/products/relay-module/): 23 series — A1J0101 Economical Input Amplifier Module; B2J0101 Economical Power-up Delay Module; B2J0201 Economical Trigger Delay Module; B2J0302 Enhanced Single MODBUS-485 I/O Module; B2J0401 MODBUS Analog/Digital I/O Module - [photoelectric-sensor](https://www.daidisensor.com/products/photoelectric-sensor/): 16 series — BGS-CX441 / BGS-CX442 Background Suppression Photoelectric Sensor; BGS-CX61 Focused-Beam Background Suppression Photoelectric Sensor; BX Series Long-range Background Suppression (BGS) Photoelectric Sensor; DD-301/401/302/402 Series Reflective Photoelectric Sensor (Wire-lead Type); DD-T21 / DD-T31 / DD-D21 Compact Self-Contained Photoelectric Sensor. A photoelectric sensor should first be selected by the optical path: **through-beam**, retro-reflective, diffuse-reflective, or background suppression. That choice decides whether the target must break a beam, return light to a receiver, or be separated from a background by distance. Housing, range and NPN/PNP output come after the sensing mode. - [color-mark-sensor](https://www.daidisensor.com/products/color-mark-sensor/): 5 series — CZ-V1 High-Precision Color Sensor; CZ-V21 RGB Digital Color Sensor (Amplifier-Separate Type); FS-S72 Color Mark Sensor (FS-S72 NPN / FS-S72P PNP); JNS-W70 / JNS-W500 Long-Range Color Mark Sensor; PZ-LX101 Color Mark Sensor - [proximity-sensor](https://www.daidisensor.com/products/proximity-sensor/): 26 series — D6.5 Series Inductive Proximity Sensors (Ultra-Short 18mm / Y-Type / 35mm / 45mm); Economy Inductive Proximity Sensors M8/M12/M18/M30 (JNX/JNS Series); Economy M4/M5/M6 Inductive Proximity Switches (Export-Grade); High-Quality Threaded M4/M5/M6 Inductive Proximity Sensors; JD Series 3-Wire Connector-Type Inductive Proximity Sensors D6.5-M8 / D6.5-M12. Start with the target, not the thread size. An **inductive proximity sensor** detects metal without contact; a **capacitive proximity sensor** can also detect non-metal targets such as plastic, glass, powder or liquid when the application is validated. Then choose the mounting geometry, sensing distance and output that match the machine input. - [safety-relay](https://www.daidisensor.com/products/safety-relay/): 2 series — DA31 Emergency-Stop Safety Relay Module; DQSRN Safety Relay Module. A **safety relay module** evaluates a dual-channel signal from an emergency-stop device, safety light curtain, safety door interlock or two-hand control and uses forcibly guided contacts to interrupt hazardous machine functions. It is the evaluation stage between the field safety device and the machine contactors — not the sensor, PLC or contactor itself. - [safety-light-curtain](https://www.daidisensor.com/products/safety-light-curtain/): 17 series — DCE Automation Safety Light Curtain; DD / DDOF Single-Sided Area Light Curtain; DQA Long-distance Safety Light Curtain; DQB Ultra-thin (Side-emitting) Safety Light Curtain; DQBT Ultra-thin Optical-sync Safety Light Curtain. A **safety light curtain** is a pair of profiles that project a fence of infrared beams across a machine opening; break any beam and the curtain's outputs drop, stopping the hazardous motion before a hand reaches it. That one sentence covers all seventeen series below — what separates them is *which* opening, *which* body part, and *which* environment they are built for. - [slot-sensor](https://www.daidisensor.com/products/slot-sensor/): 5 series — DD-303N / DD-403N Wide-slot Photoelectric Sensor; DD-670 Series Slot Photoelectric Sensor (Pin/Plug-in Connector Type); DD-L25/45 Series Micro-slot (Micro U-shaped) Photoelectric Sensor; EE-SX67 Series Slot-type Photoelectric Sensor (Photomicrosensor); FS-KNS Slot Photoelectric Sensor (Plug-in Type) - [laser-distance-sensor](https://www.daidisensor.com/products/laser-distance-sensor/): 3 series — DDA-Y & DDB-Y Industrial Laser Distance Sensor (Phase-Shift); DDK-F Long-range Laser Distance Sensor; DSK-CG Long-range Laser Distance Sensor - [outdoor-security-sensor](https://www.daidisensor.com/products/outdoor-security-sensor/): 1 series — DDSK-J Outdoor Laser Beam Detector - [laser-switch-sensor](https://www.daidisensor.com/products/laser-switch-sensor/): 7 series — DDSK Laser Diffuse Reflective Sensor M12 / DK Laser Diffuse Reflective Sensor M18; DDSK Ultra-Miniature Laser Diffuse Reflective Sensor (M3/M4/M5/M6/M8); DS Laser Through-Beam Sensor M12/M18 (50m); DS Miniature Laser Through-Beam Sensor (M3/M4/M5/M6/M8); DS Right-Angle (90°) Laser Through-Beam Switch M4 / M6 - [laser-displacement-sensor](https://www.daidisensor.com/products/laser-displacement-sensor/): 3 series — DK-G Series Laser Displacement Sensor; DDK-G Laser Displacement Sensor 30-250 mm; LK-F Series CMOS Laser Displacement Sensor - [hot-metal-detector](https://www.daidisensor.com/products/hot-metal-detector/): 1 series — DK-SCZ-II Hot & Cold Metal Detector (Laser Distance Type) - [press-brake-protection](https://www.daidisensor.com/products/press-brake-protection/): 3 series — DKE-L3 Press Brake Laser Protection; DQS Press Photoelectric Safety Guard; DQV Double-sided Photoelectric Safety Protection Device - [lidar](https://www.daidisensor.com/products/lidar/): 10 series — DLD-100D Single-Line TOF Scanning LiDAR; DLD-50D 2D TOF LiDAR for Navigation & Mapping (50 m); DLD-50G 2D Single-line LiDAR (Diffuse-remission Measuring Type); DLD05A3 2D TOF Obstacle-avoidance LiDAR (5 m); DLD20A5-5N / DLD20A5-5P 2D TOF Obstacle-avoidance LiDAR (20 m) - [measuring-light-curtain](https://www.daidisensor.com/products/measuring-light-curtain/): 3 series — DQL Measuring Light Curtain (Analog/RS485); DQLV Vehicle Separation Light Curtain; DQM Measuring Light Curtain (Switching Output) - [safety-door-lock](https://www.daidisensor.com/products/safety-door-lock/): 9 series — DX-C1 Magnetic Coded Safety Switch; DX-D2 & DX-D3 Safety Door Switch; DX-D6 Guard Locking Safety-Door Switch; DX-K Series Safety Door Lock Operation Keys; DX-R1 Non-contact Safety Switch (RFID Coded). A **safety interlock switch** either monitors whether a machine guard is closed, or monitors and physically locks it. Use monitoring-only when opening the guard removes access before a hazard can remain; use a guard-locking switch when motion, pressure, heat or stored energy continues after the stop command and the door must stay closed until release is permitted. - [fiber-optic-sensor](https://www.daidisensor.com/products/fiber-optic-sensor/): 3 series — Fiber Amplifier (Digital Fiber Optic Sensor Amplifier); Fiber Optic Sensor Heads (Fiber Units); Matrix (Array) Fiber Optic Heads - [safety-edge](https://www.daidisensor.com/products/safety-edge/): 2 series — JB-PSE Series Pressure-Sensitive Safety Edge; JB Series Safety Edge (Economy Line) - [contact-displacement-sensor](https://www.daidisensor.com/products/contact-displacement-sensor/): 1 series — JNS-Q Contact Displacement Grating Sensor - [safety-mat](https://www.daidisensor.com/products/safety-mat/): 1 series — JT14 Safety Mat (Economical) ## What we do - Manufacture and supply the sensor and machine-safety product lines listed above, factory-direct from Foshan, Guangdong, China. - OEM / ODM: custom housings, cable lengths, connectors, labelling and model codes on our existing platforms. - Supply the operating instructions, wiring information and technical data needed to design our products into a machine. - Send certification documentation on request, for the exact model code you intend to use. ## Capability boundaries — what we do NOT do - We do not provide machine risk assessments, safety-distance calculations or CE marking for your machine. Those are the machine builder's or integrator's responsibility under ISO 12100 / ISO 13849-1 / ISO 13855. We publish the device parameters those calculations need (response time, extension distance ZR, tolerance zone, object resolution) and worked examples that illustrate the formulae only. - We do not claim third-party certification we cannot document. Where a certificate exists we send it on request; where a figure is not published in the product's operating instructions we say so rather than estimate it. - We do not publish PFHd, MTTFd or TM figures for every product. Where they are not in the manual, ask and we will confirm with the factory before you design the product in. - Our LiDAR products fall into two distinct groups and they are not interchangeable: the ST27 series is safety-rated electro-sensitive protective equipment (Type 3 / SIL 2 / PL d, OSSD outputs); the DLD and SDLD series are obstacle-avoidance and measuring LiDAR with no safety rating and ordinary discrete outputs, and must never be used as the protective device in a machine safety function. - Safety laser scanners resolve 70 mm objects and suit leg, body and vehicle detection. They do not protect fingers (14 mm) or hands (30 mm) — that needs a safety light curtain. - We are a manufacturer, not a systems integrator. We do not install, commission or validate safeguarding on site. ## Key pages - [All products](https://www.daidisensor.com/products/) - [About / factory / certificates](https://www.daidisensor.com/about/) - [Contact & quotes](https://www.daidisensor.com/contact/) # Product index (all series) ## relay-module ### A1J0101 Economical Input Amplifier Module URL: https://www.daidisensor.com/products/relay-module/a1j0101-economical-input-amplifier-module/ A1J0101 optocoupler-isolated input amplifier module: 1000V input isolation, 250V AC/10A relay output, 5-24V DC supply, selectable high/low-level trigger. - Input isolation is rated DC 1000V for 60s (type test); working input isolating voltage is less than 250V. - The relay output switches DC 30V or AC 0-220V at 8A under normal conditions, with an absolute maximum of AC 250V, 10A on both the NO and NC contacts. - Supply current is less than 50mA, typically 40mA with the relay energized, from a 5V, 9V, 12V, 18V or 24V DC supply. - Relay mechanical life exceeds 100,000 operations (more than 10,000 under heavy load). ### B2J0101 Economical Power-up Delay Module URL: https://www.daidisensor.com/products/relay-module/b2j0101-economical-power-up-delay-module/ B2J0101 power-up delay relay module: 2-30s adjustable delay via potentiometer, 5-24V DC supply, single relay output up to 250V AC/10A, no trigger input. - B2J0101's power-up delay is adjustable from 2 to 30 seconds via an on-board potentiometer, with no external trigger input — the countdown starts the instant power is applied. - B2J0101 can be supplied from 5V, 9V, 12V, 18V or 24V DC, with a supply current below 50mA (typical 40mA when the relay is energized). - B2J0101's single relay output is rated up to 250V AC / 10A as an absolute maximum, with a normal operating output stress of AC 0-220V or DC 30V at 8A. - B2J0101's output isolation voltage is type-tested to DC 1000V / 60s (relay type), with continuous operating isolation below 250V. ### B2J0201 Economical Trigger Delay Module URL: https://www.daidisensor.com/products/relay-module/b2j0201-economical-trigger-delay-module/ B2J0201 economical trigger delay relay module: 5-24V DC supply, jumper-selectable high/low-level trigger, 2-30s adjustable delay, 250V AC/10A relay output. - The B2J0201 begins its delay only after an external trigger signal or button press is applied; the relay does not start counting down at power-up. - Delay time is adjustable from 2 to 30 seconds via an on-board NE555-based potentiometer circuit, with no programming required. - Trigger polarity is jumper-selectable: high-level trigger fires on a voltage above 2V at the trigger terminal, low-level trigger fires when the terminal is shorted to ground. - The default M31 configuration is a 12V DC supply with a single-channel relay output rated AC 250V / 10A absolute maximum (NO/NC), and relay mechanical life exceeds 100,000 operations. ### B2J0302 Enhanced Single MODBUS-485 I/O Module URL: https://www.daidisensor.com/products/relay-module/b2j0302-economical-single-modbus-485-i-o-module/ B2J0302 enhanced MODBUS-RTU/RS-485 I/O module: 1 digital + 2 analog inputs (0-35V/0-5V), relay output to 250V AC/10A or transistor to 48V DC, AT commands, PWM. Replaces B2J0301. - B2J0302 is the enhanced single-channel MODBUS-RTU RS-485 I/O module: 1 digital input, 2 analog inputs, 1 relay or open-drain transistor output. - It is the direct successor to the discontinued B2J0301 — same wiring, same board size, same MODBUS registers for input and output, with added functions. - Relay output: NO and NC contacts rated 30 V DC or 0-220 V AC at 8 A working (250 V AC / 10 A absolute maximum); mechanical life over 100,000 operations. - Transistor variant: open-drain output 12-48 V DC at 8 A working with built-in 10 A freewheel diode, plus PWM output about 337 Hz to 86.4 kHz with 8-bit duty resolution. ### B2J0401 MODBUS Analog/Digital I/O Module URL: https://www.daidisensor.com/products/relay-module/b2j0401-relay-module/ B2J0401 economical MODBUS-RTU/RS-485 module with 4 digital/analog dual-use inputs and 2 MOSFET PWM/PTO outputs, 9600-115200bps, DC 50V max, USB configuration. - 4 digital/analog dual-use inputs (DIN0-3 / AIN0-3) on the same terminals: 16-bit analog register with LSB = 1 mV and typical 3% full-scale accuracy, or digital input with a threshold of about 3 V. - Per-channel debounce filter configurable 1-65535 ms in 1 ms steps, plus rising-edge pulse counting that rolls over at 65535 at frequencies up to 5 Hz. - 2 open-drain MOSFET outputs (DOUT0/DOUT1) with direct drive, on-delay (5 trigger modes), standard PWM, standard PTO (channels 0/1) and fast PWM (channel 0). - Emergency brake set by BRKCFG blocks the outputs immediately, latches BRKFLG = "BK" until cleared over the communication port, and takes priority over forced output. ### B2J0601 Economical Intelligent Trigger Delay Module URL: https://www.daidisensor.com/products/relay-module/b2j0601-economical-intelligent-trigger-delay-module/ B2J0601 economical intelligent delay relay module: 26 delay modes, 0-255 unit second/minute/hour timing, 30 ppm accuracy, and 0-30V voltage detection. - 26 delay modes in one module: 3 time units (second/minute/hour) x 8 trigger/action templates = 24 modes, plus 2 edge-triggered self-locking modes. - Delay time is set from 0 to 255 units with a single button, so one board covers a 2-second flashing interval and a 200-hour soak cycle. - Long-term delay accuracy reaches 30 ppm, with no drift from temperature, humidity or supply voltage across the -20 to 60 C operating range. - Supply versions of 5V, 9V, 12V and 24V DC (default M31 = 12V relay output) draw less than 50 mA, typically 40 mA with the relay energised. ### B2J0701 Ethernet to RS-485 MODBUS-TCP Gateway Module URL: https://www.daidisensor.com/products/relay-module/b2j0701-ethernet-rs485-modbus-gateway-module/ B2J0701 Ethernet to RS-485 gateway: MODBUS-TCP to RTU conversion, transparent mode, TCP server/client, USB config, 5-24V DC. Puts your RS-485 modules on the network. - B2J0701 is an economical Ethernet (10Base-T) to RS-485 gateway: MODBUS-TCP to MODBUS-RTU conversion plus transparent serial tunnelling in one module. - Works as a TCP server for classic LAN topologies, or as a TCP client that connects outward to a host or cloud server — the right choice behind NAT firewalls on wide-area installations. - Gateway mode is request-response managed with a frame-timeout mechanism, so an unresponsive RS-485 slave cannot stall the whole bus. - Transparent mode tunnels arbitrary serial data with 4 KiB receive and transmit buffers and a basic transport-encryption option — legacy serial protocols keep working over the network. ### D3J0104 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0104-modbus/ D3J0104 Modbus-RTU/RS-485 digital input module: 4 isolated inputs, 2 analog inputs, 11-28V DC supply, edge counting and adjustable filtering per channel. - 4 fully isolated digital inputs, plus 2 analog input channels and 1 x 5V/100mA sensor supply, on a 54 x 88 x 59mm board with 5.08mm terminal pitch. - Default communication is 9600bps, 8 data bits, even parity, 1 stop bit at slave address 0x02; the address range is 1-247 and the baud rate is selectable up to 115200bps. - Supply voltage is DC 11-28V, drawing typically 40mA and under 1500mA, with ripple tolerance under 1Vp-p. - Each channel has an independent input filter adjustable 1-65535ms and a rising-edge counter that runs up to 5Hz and rolls over at 65535. ### D3J0108 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0108-modbus/ D3J0108 (D3J01 series) is an 8-channel fully isolated Modbus-RTU/RS-485 digital input module with DC 11-28V supply and 2kV EFT immunity for control cabinets. - 8 fully isolated digital inputs plus 2 auxiliary analog input channels (1mV per bit, approx. 10-bit, typ. 3% accuracy) and a 5V/100mA sensor power output. - EFT immunity of 2kV/5kHz/2min at Criterion A - double the 1kV required by IEC61000-6-2-2016 for industrial environments. - Default Modbus-RTU communication: 9600 bps, 8 data bits, even parity, 1 stop bit, slave address 0x02, with an address range of 1-247 and baud rates up to 115200 bps. - Inputs accept DC 0-30V with an approximately 3V threshold; input response time is typically 20ms and serial reply time is at most 25ms. ### D3J0116 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0116-modbus/ D3J0116 (D3J01 series) is a 16-channel fully isolated Modbus-RTU/RS-485 digital input module, DC 11-28V supply, 2 analog inputs, 2kV EFT immunity, for panels. - 16 fully isolated digital inputs on one Modbus node, plus 2 bonus analog input channels and a 5V/100mA sensor power output. - Default Modbus-RTU communication is 9600 bps, 8 data bits, even parity, 1 stop bit at slave address 0x02; the address range is 1-247 and the baud rate is selectable up to 115200 bps. - EFT immunity is 2kV/5kHz, twice the 1kV level the IEC61000-6-2-2016 industrial standard asks for; ESD of 4kV to all terminals leaves operation normal (Criterion A). - Per-channel rising-edge counting up to a 5Hz pulse rate (rolls over at 65535) and per-channel input filtering adjustable from 1 to 65535ms, savable through power loss. ### D3J0128 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0128-modbus/ D3J0128 is a 28-channel fully isolated Modbus-RTU/RS-485 digital input module with DC 11-28V supply and 2kV EFT immunity for industrial control panels. - D3J0128 provides 28 fully isolated digital inputs plus 2 analog input channels and 1 x 5V/100mA sensor power output; it is a pure-input module with no relay or transistor outputs, measuring 158 x 88 x 59mm (tolerance +/-5%) with 5.08mm terminal pitch, one green power LED and one yellow LED per input channel. - All 28 inputs sit in the discrete input block from address 0x0000 under a single slave address, so one function code 0x02 poll returns every channel state, with a serial reply time of up to 25ms and typical input response of 20ms. - Supply voltage is DC 11-28V (absolute maximum DC 28V) with supply current under 1500mA, ripple under 1Vp-p, and a DC 250V / 3000mA slow-blow fuse on board; the module operates from -20 to 60C and stores from -40 to 85C. - Default communication is 9600bps, 8 data bits, even parity, 1 stop bit at slave address 0x02 (fixed at 0x01 in USB mode); baud rate is configurable from 300 to 115200bps and slave address from 1-247. ### D3J0202 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0202-modbus/ D3J0202 Modbus-RTU/RS-485 digital output module: 2 isolated relay or transistor outputs, 8A switching, DC 11-28V supply, up to 2 PWM/PTO pulse channels. - The D3J0202 provides 2 fully isolated digital output channels, each with NC / COM / NO terminals, orderable as relay type (DC 30V or AC 0-220V, 8A) or open-drain transistor type (DC 12-48V, 8A, with a built-in 10A freewheeling diode); product ID is 0x3202 and the default shipped order code is D3J0202M111 (all-relay output, pulse unavailable, no wireless). - It runs on a DC 11-28V supply at 40mA typical (under 1500mA maximum, ripple below 1Vp-p) and operates from -20 to 60 degrees C, with storage from -40 to 85 degrees C. - Communication is Modbus-RTU over RS-485, defaulting to 9600bps / 8 data bits / even parity / 1 stop bit, with 300-115200bps and slave addresses 1-247 (0x01-0xF7) selectable; the 2 outputs occupy coils 0x0000-0x0007 and respond to function codes 0x01, 0x05 and 0x0F. - Relay mechanical life exceeds 100,000 operations, and over 10,000 operations under heavy load. ### D3J0204 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0204-modbus/ D3J0204 4-channel Modbus-RTU/RS-485 output module: relay or MOSFET output, 8A per channel, 2 optional PWM/PTO channels, DC 11-28V, 9600-115200bps. - 4 fully isolated digital output channels in a 72 x 88 x 59 mm body, each with its own NC/COM/NO screw terminals on a 5.08 mm pitch. - Relay-type contacts switch AC 0-220 V or DC 30 V at 8 A with a mechanical life over 100,000 cycles (over 10,000 cycles under heavy load); open-drain MOSFET-type outputs are rated DC 12-48 V, 8 A and carry a built-in 10 A flyback diode. - Up to 2 of the 4 channels (DO0/DO1) can be ordered as high-speed transistors for standard PWM, standard PTO or fast-PWM pulse output, in addition to their on/off function. - Standard MODBUS-RTU slave: default 9600 bps / 8 data bits / even parity / 1 stop bit at address 0x02, with baud rates 300-115200 bps, addresses 1-247 (0x01-0xF7) and product ID 0x3204. ### D3J0208 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0208-modbus/ D3J0208 is an 8-channel isolated Modbus-RTU/RS-485 digital output module with relay or transistor outputs, DC 11-28V supply, 8A, and 2 PWM/PTO channels. - 8 fully isolated digital outputs with NC/COM/NO screw terminals on each channel (24 output terminals, 5.08mm pitch), plus up to 2 high-speed PWM/PTO pulse outputs on DO0/DO1. - Relay outputs are rated DC 30V or AC 0-220V at 8A with a mechanical life of over 100,000 operations (over 10,000 under heavy load); transistor (open-drain) outputs are rated DC 12-48V at 8A with a built-in 10A flyback diode for inductive DC loads. - Default Modbus-RTU communication is 9600 bps, 8 data bits, even parity, 1 stop bit at slave address 0x02, selectable across 300-115200 bps and addresses 1-247; the 8-channel type maps its outputs to coils 0x0000-0x001F. - Ten Modbus function codes are supported, including 0x01 read coils, 0x05 write single coil, 0x0F write multiple coils, 0x03/0x06/0x10 holding registers, 0x04 read input registers and 0x11 report device ID; product ID is 0x3208. ### D3J0214 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0214-modbus/ D3J0214 is a 14-channel Modbus-RTU RS-485 isolated digital output module with relay or transistor outputs, 8A switching, and up to 2 PWM/PTO pulse channels. - 14 fully isolated digital output channels in a single 158 x 88 x 59 mm module, terminal pitch 5.08 mm. - Relay outputs switch DC 30V or AC 0-220V at 8A, with a mechanical life over 100,000 cycles (10,000+ under heavy load). - Transistor outputs are open-drain at DC 12-48V / 8A, with a built-in 10A flyback diode for direct inductive loads. - The 14 channels occupy all 56 Modbus coils from 0x0000 to 0x0037; product ID and address code is 0x3214, default slave address 0x02. ### D3J0302 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0302-modbus/ D3J0302 (D3J03 series) is a 2-input/1-output Modbus-RTU/RS-485 I/O module with relay or transistor output, DC 11-28V supply, and 2kV EFT immunity. - One 54 x 88 x 59mm module with 8 screw terminals at 5.08mm pitch carries 2 fully isolated digital inputs, 1 digital output, 2 analog inputs, up to 2 high-speed pulse outputs and a 5V/100mA sensor supply. - Supply is DC 11-28V at under 1500mA with ripple below 1Vp-p; operating range is -20 to 60C and storage -40 to 85C. - Default Modbus-RTU communication is 9600 bps, 8 data bits, even parity, 1 stop bit at slave address 0x02; baud rate is selectable from 300 to 115200 bps and the address range is 1-247. - Relay output is rated DC 30V or AC 0-220V at 8A; the transistor option is open-drain, rated DC 12-48V at 8A, with a built-in 10A flyback diode that can drive 10A inductive loads directly. ### D3J0304 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0304-modbus/ D3J0304 Modbus-RTU/RS-485 digital I/O module: 4 isolated inputs, 2 relay/transistor outputs, 11-28V DC supply, local input-linked output and emergency brake. - 4 fully isolated digital inputs (threshold approx. 3V, input stress DC 0-30V) and 2 digital outputs on one board, plus 2 analog inputs, up to 2 PWM/PTO pulse outputs and a 5V/100mA sensor supply. - Relay outputs are rated DC 30V or AC 0-220V at 8A with mechanical life over 100,000 cycles; the optional FET version is open-drain, DC 12-48V, with a built-in 10A flyback diode for inductive loads. - Default communication is Modbus-RTU at 9600bps, 8 data bits, even parity, 1 stop bit; baud rates 300-115200bps, slave address range 1-247, default address 0x02, product identification code 0x3304. - Supply voltage is DC 11-28V at under 1500mA, with ripple under 1Vp-p; operating temperature is -20 to 60C. ### D3J0308 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0308-modbus/ D3J0308 Modbus-RTU/RS-485 I/O module: 8 isolated inputs, 4 relay/transistor outputs at 8A, DC 11-28V supply, with local interlock and emergency braking. - 8 fully isolated digital inputs and 4 fully isolated digital outputs (relay or transistor type, selectable at order time) on one module, plus 2 analog inputs, up to 2 PWM/PTO pulse channels and a 5V/100mA sensor supply. - Relay output switches DC 30V or AC 0-220V at 8A; transistor output is open-drain at DC 12-48V / 8A with a built-in 10A freewheeling diode for direct inductive-load drive. - Supply voltage DC 11-28V at under 1500mA; RS-485 communication, inputs and outputs are each electrically isolated from the internal logic (isolation voltage under 250V, normal condition). - Typical input/output response time 20ms and maximum serial command reply time 25ms; each input has a 65535-count rising-edge counter and an adjustable debounce filter retained through power loss. ### D3J0312 Modbus URL: https://www.daidisensor.com/products/relay-module/d3j0312-modbus/ D3J0312 Modbus-RTU/RS-485 I/O module: 12 isolated inputs, 8 relay/transistor outputs at 8A, DC 11-28V supply, plus analog input and PWM/PTO pulse outputs. - 12 fully isolated digital inputs and 8 fully isolated digital outputs (relay or transistor type, selectable at order time) on one module - the highest channel count in the D3J03 series. - Relay-type outputs switch DC 30V or AC 0-220V at 8A; transistor-type outputs are open-drain, DC 12-48V at 8A, with a built-in 10A freewheeling diode. - Default Modbus-RTU communication at 9600bps, 8 data bits, even parity, 1 stop bit; baud rate selectable 300-115200bps; slave address range 1-247 (0x01-0xF7); product ID 0x3312. - Typical I/O response time 20ms and maximum serial reply time 25ms; relay mechanical life exceeds 100,000 operations (over 10,000 under heavy load). ### D4G0206 Relay Module URL: https://www.daidisensor.com/products/relay-module/d4g0206-relay-module/ D4G0206 micro PLC module: schematic programming replaces ladder logic, with 6 digital/analog inputs and 4 relay or transistor outputs rated up to 8A. - 6 input channels accept 0-35V DC and each one takes either a digital or an analog signal; the inputs are not isolated from the supply, so field devices must share the module's 0V rail. - 4 independent outputs, each a potential-free NO-COM-NC changeover contact rated 8A: 0-30V DC or 0-220V AC on the relay version, or sinking 12-48V DC only on the transistor version. - Power input accepts 11-24V DC (absolute max 28V) with reverse-polarity protection; consumption is 250mA maximum running and 35mA maximum standby. - Tested to 1000V DC isolated output on the relay side; the inputs are non-isolated from the supply; creepage is 6mm minimum and clearance 2mm minimum from the relay terminals to the logic side at pollution degree 3. ### E4J0101 Easy Multifunctional Trigger Delay Module URL: https://www.daidisensor.com/products/relay-module/e4j0101-easy-multifunctional-trigger-delay-module/ E4J0101 multifunctional trigger delay relay module: about 100 delay templates, ~1,000 delay modes, 1.5% factory accuracy (0.1% after calibration). - About 100 basic delay templates in five groups (switching 5, delay-then-break 40, delay-make-then-break 34, cyclic delay 17, counting delay 8) combine with input/output polarity inversion for roughly 1,000 distinct delay modes. - Delay times A and C are each set as 0-999 multiplied by a selectable unit of 10 ms, 100 ms, 1 s, 10 s, 1 min, 10 min, 1 h or 10 h; loop count L is 0-9999, where 0 means unlimited. - Factory delay accuracy is 1.5% across the full -20 to 60 C operating range, tightened to 0.1% (0.05% with fine calibration) after USB PC calibration over a trim range of about +/-2%. - Measured noise immunity is 2000 V EFT and 4000 V ESD, twice the 1 kV EFT required by IEC61000-6-2; the digital trigger input is optocoupler-isolated at a measured 1500 V DC. ### E4J0102 Easy Multifunctional Clock-Trigger Delay Module URL: https://www.daidisensor.com/products/relay-module/e4j0102-easy-multifunctional-clock-trigger-delay-module/ E4J0102 clock-trigger delay module: 0-30V voltage-threshold trigger, 0.01V resolution, optional RTC with 8 trigger points, ~1,000 delay modes, 5-24V DC. - The E4J0102's differential analog voltage input reads 0-30V per terminal and is non-polarized, with a threshold-setting resolution of 0.01V over a 0-39.99V range and analog-to-digital conversion accuracy of about 0.1V. - About 100 base delay templates combine with input/output polarity inversion into roughly 1,000 delay modes across five groups; delay times A and C are each adjustable 0-999 in eight time-unit steps from 10ms to 10h, with a cycle count of 0-9999. - Factory delay accuracy is about 1% (2% worst case) and can be calibrated via PC software to within 0.05%, using a calibration value of 0-100 that shifts timing by about 0.05% per step over a +/-2% range. - Selected versions include a battery-backed real-time clock with up to 8 calendar trigger points and an optional buzzer; each clock trigger produces about a 500ms trigger pulse, and calibrated real-world clock drift is 0.5 s/day typical and 2 s/day maximum. ### E4J0103 Easy Multifunctional Dual-Channel Trigger Delay Module URL: https://www.daidisensor.com/products/relay-module/e4j0103-easy-multifunctional-dual-channel-trigger-delay-module/ E4J0103 dual-channel trigger delay module: 3 optocoupler inputs, 2 relay/transistor outputs, ~1000 delay modes, four linkage types, 0.01% accuracy. - Two relay or transistor output channels that can be linked through four categories - simultaneous, sequential, alternating and mutual-follow (same / interlock / mutual-block) - selected by a single digit of the F--0 menu. - About 100 independent delay templates per channel across five groups, combined with input and output polarity reversal for about 1000 delay modes in total. - Delay times A and C are set 0-999 in units of 10 ms, 100 ms, 1 s, 10 s, 1 min, 10 min, 1 h or 10 h, with a cycle count L of 0-9999 (0 = unlimited). - Factory-default delay accuracy of 0.01% (one part in ten thousand) across the full -20 to 60 C operating range. ## photoelectric-sensor Category URL: https://www.daidisensor.com/products/photoelectric-sensor/ ### Choose a Photoelectric Sensor by Sensing Mode A photoelectric sensor should first be selected by the optical path: **through-beam**, retro-reflective, diffuse-reflective, or background suppression. That choice decides whether the target must break a beam, return light to a receiver, or be separated from a background by distance. Housing, range and NPN/PNP output come after the sensing mode. The sixteen series below range from M3–M18 threaded barrels and ultra-thin bodies to square relay-output sensors, strip-beam detectors and focused background-suppression models. The map identifies the correct family before you compare part numbers. ### Through-Beam, Retro-Reflective, Diffuse or Background Suppression Through-beam uses a separate emitter and receiver. It is the strongest starting point for mixed target colours and long spans because detection occurs when the target interrupts the beam. Retro-reflective places the emitter and receiver on one side and a reflector on the other. Diffuse-reflective works from one side with no reflector, using light returned by the target. Background suppression also works from one side but is designed to separate the target from objects beyond a set distance. Background suppression is a distance-selective optical method; it is not automatically time-of-flight. The BGS-CX and BX pages use only their published BGS descriptions and do not claim ToF. Mode | Hardware layout | Best starting point | Watch for Through-beam | emitter and receiver opposite | long span and mixed surfaces | two-sided mounting and alignment Retro-reflective | sensor one side, reflector opposite | one powered side with a clear reflector location | reflective targets may need application testing Diffuse-reflective | single sensor, target returns light | simple one-sided presence detection | colour and surface can change usable range Background suppression | single sensor, distance-selective optics | target in front of a nearby background | setting range and black/white differential ### M12 and M18 Through-Beam Photoelectric Sensors The [H-M through-beam family](/products/photoelectric-sensor/h-m-series-m12-m18-through-beam-photoelectric-sensor/) is the main M12/M18 opposed-mode range in this catalogue: M12 pairs at 2 m or 5 m, and M18 pairs at 5 m or 15 m, each offered in NPN or PNP and N.O. or complementary N.O.+N.C. output variants. It is the first series to compare for conveyor cross-belt detection, chute monitoring or a wide portal where target colour should not decide the result. For an ultra-thin housing and shorter span, compare the [DX-15/30/50/100 series](/products/photoelectric-sensor/dx-15-30-series-ultra-thin-self-contained-photoelectric-sensor/). For a square housing with internal relay or transistor choices, compare [E3JK](/products/photoelectric-sensor/e3jk-square-photoelectric-sensor/). ### Diffuse-Reflective and Background-Suppression Selection Use compact diffuse models when one-sided mounting and straightforward presence detection matter: the [H-series M3–M6](/products/photoelectric-sensor/h-series-micro-diffuse-photoelectric-sensor/), [H08/R12 M8–M12](/products/photoelectric-sensor/h08-r12-series-micro-diffuse-reflective-photoelectric-sensor/), [JNS18/JNK18 M18](/products/photoelectric-sensor/jns18-and-jnk18-series-m18-diffuse-photoelectric-sensor/) and [QF-35 M8](/products/photoelectric-sensor/qf-35-m8-diffuse-reflective-photoelectric-sensor/) cover different footprints and ranges. Use BGS where a nearby machine wall or conveyor structure must be ignored. BGS-CX61 supplies a focused 2 mm spot and IP67 housing; BGS-CX441/CX442 publish their own adjustable ranges and black/white differential distances; BX extends the one-sided BGS family to the longer published ranges on its product page. Pick from those measured specifications, not from the word ‘smart’. ### Photoelectric Sensor Output and Housing Checklist After the optical mode is fixed, match NPN or PNP to the PLC input and choose N.O., N.C. or complementary logic by the control sequence. Use the [NPN vs PNP guide](/guides/npn-vs-pnp-outputs-explained/) for the current path. Then check the real installation limits: supply voltage, response time, IP rating, minimum target, available mounting faces and cable replacement method. These are general-purpose detection sensors. They are not personnel-protection devices. For machine access safety, use the [safety light curtain range](/products/safety-light-curtain/) or [safety door switches](/products/safety-door-lock/) selected from the machine risk assessment. ### Category FAQ Q: Which photoelectric sensor is best for dark or shiny objects? A: A through-beam pair is the strongest starting point because the target is detected by interrupting the beam rather than by returning a certain amount of reflected light. Application testing is still required for partially transparent targets. Q: What is a through-beam photoelectric sensor? A: It is an opposed emitter and receiver pair. The receiver output changes when an object blocks the optical path between the two housings. Q: What is the difference between diffuse reflective and background suppression? A: Both work from one side. A standard diffuse sensor switches from target-reflected light; a BGS sensor is designed to distinguish a target from a background beyond a set distance. Q: Are background-suppression photoelectric sensors the same as ToF sensors? A: No. Background suppression describes the application result, not one universal ranging technology. A product should only be called time-of-flight when its first-party specification explicitly states that principle. Q: Which H-M model gives a 15 m through-beam range? A: The M18 H1815M range class is published at 15 m ±10%. Choose its NPN/PNP and output-logic suffix from the product model table. Q: Can a general photoelectric sensor replace a safety light curtain? A: No. The products on this category page are for automation detection, not safety-rated personnel protection. ### BGS-CX441 / BGS-CX442 Background Suppression Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/bgs-cx441-bgs-cx442-background-suppression-photoelectric-sensor/ BGS-CX441/CX442 background suppression photoelectric sensors: 2 mm or 15 mm spot, 10-300 mm adjustable range, 0.5 ms response, IP65, NPN/PNP output. - BGS-CX441 offers an adjustable sensing distance of 10-100 mm with an 80 mm black/white differential distance (100 mm on white paper). - BGS-CX442 offers an adjustable sensing distance of 20-300 mm, extending to 500 mm on white targets, with a 280 mm black/white differential distance. - BGS-CX441 uses a 2 mm infrared spot; BGS-CX442 uses a 15 mm wide spot for detection on perforated or textured surfaces. - Both models respond in under 0.5 ms with a 100 Hz switching frequency. ### BGS-CX61 Focused-Beam Background Suppression Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/bgs-cx61-focused-beam-background-suppression-photoelectric-sensor/ BGS-CX61 background suppression photoelectric sensor: 2 mm focused spot, under 0.5 ms response, IP67 rated, NPN/PNP open-collector output, DC12-24V. - The BGS-CX61 background-suppression photoelectric sensor projects a focused 2 mm light spot and responds in under 0.5 ms. - BGS-CX61N provides NPN open-collector output; BGS-CX61P provides PNP open-collector output. - The BGS-CX61's white control wire selects Light-ON or Dark-ON operation on site: unconnected for Light-ON, connected to the blue wire for Dark-ON. - The BGS-CX61 operates on DC 12-24V (±10%) with current consumption under 30 mA and is rated IP67 per IEC 60529. ### BX Series Long-range Background Suppression (BGS) Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/bx-series-long-range-background-suppression-photoelectric-sensor/ BX series long-range background suppression photoelectric sensor detects targets up to 4000 mm from one side, no reflector, 2 ms response, DC12-24V. - The BX-H4000 background suppression photoelectric sensor has an adjustable sensing range of 50-4000 mm. - BX-G2000 and BX-S2000 are diffuse reflective sensors with an adjustable range of 30-2000 mm. - All BX series sensors have a 2 ms response time and operate on DC12-24V. - BX-H4000 is available in NPN (BX-H4000NPN) and PNP (BX-H4000PNP) output versions. ### DD-301/401/302/402 Series Reflective Photoelectric Sensor (Wire-lead Type) URL: https://www.daidisensor.com/products/photoelectric-sensor/dd-301-401-302-402-series-reflective-photoelectric-sensor/ DD-301/401/302/402 reflective photoelectric sensor: 5mm detection range, DC5-24V supply, NPN output, 940nm infrared, 500Hz switching frequency, IP50 rated. - The DD-301/401/302/402 series is a diffuse-reflective NPN photoelectric sensor rated for a 5mm detection distance against a 90% reflectance white paper target. - DD-301 and DD-302 are Dark-ON (output ON when the beam is blocked); DD-401 and DD-402 are Light-ON (output ON when reflected light is received). - DD-301/DD-401 are horizontal (side-sensing) models; DD-302/DD-402 are vertical (top-sensing) models. - The sensor operates on a DC5-24V ±10% supply, covering both 5V logic-board and 24V industrial-control applications. ### DD-T21 / DD-T31 / DD-D21 Compact Self-Contained Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/dd-t21-dd-t31-dd-d21-compact-self-contained-photoelectric-sensor/ DD-T21/T31/D21 compact photoelectric sensors: built-in amplifier, NPN NO output, 1.5m/2.5m through-beam or 150mm diffuse, 1ms response, DC10.8-26.4V. - DD-T21 and DD-T31 are through-beam photoelectric sensors with an infrared light source, detecting at 1.5 m and 2.5 m respectively. - DD-D21 is a diffuse-reflective photoelectric sensor with a 150 mm detection range and on-site adjustable sensitivity. - All three models in the DD-T21/T31/D21 series output NPN, Normally Open (NO), and operate on 10.8-26.4 VDC (nominal 12-24 VDC). - The series has a response time of 1 ms, a maximum current consumption of 20 mA, and a minimum detectable object size of 6 mm. ### DK-D461 / DK-D561 Strip-beam (Line-beam) Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/dk-d461-dk-d561-strip-beam-photoelectric-sensor/ DK-D461/DK-D561 strip-beam photoelectric sensors: 4mm x 100mm line beam, background-suppression sensing to 200mm, 1ms response, IP65, DC12-24V, NPN/PNP. - The DK-D461 photoelectric sensor emits a strip-shaped light beam 4 mm wide and up to 100 mm long, in place of a conventional round point spot. - The DK-D461 uses distance-settable (background-suppression) reflective sensing with a detection distance within 200 mm. - Repeatability is 1 mm along the sensing axis and 0.2 mm perpendicular to it, with hysteresis under 2% of the operating distance. - Ambient light immunity is rated up to 3,000 lx incandescent and 10,000 lx sunlight at the receiver. ### DX-15/30/50/100 Series Ultra-thin Through-beam Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/dx-15-30-series-ultra-thin-self-contained-photoelectric-sensor/ DX series ultra-thin through-beam photoelectric sensor: emitter/receiver pairs at 150, 300, 500 and 1000mm, front-sensing (F) or side-sensing (L), NPN or PNP, N.O./N.C. switchable, detects 1mm objects. - The DX series is a through-beam (opposed) sensor: each model number is a matched emitter/receiver pair, not a single reflective unit. Detection occurs when an object breaks the beam between the two housings. - Detection distances across the series are 150 mm (DX-15), 300 mm (DX-30), 500 mm (DX-50L / DX-50F) and 1000 mm (DX-100L / DX-100F). - Both optical layouts are available at every distance: front-sensing (beam along the housing axis) and side-sensing (beam turned 90 degrees for rail-side or panel-gap mounting). - On the 500 mm and 1000 mm models the model code carries an L or F suffix — L = side-sensing, F = front-sensing — and an (N/P) option for NPN or PNP output. ### E3JK Square Photoelectric Sensor (Relay & Transistor Output) URL: https://www.daidisensor.com/products/photoelectric-sensor/e3jk-square-photoelectric-sensor/ E3JK square photoelectric sensors: diffuse 0.5/1.5m, retro-reflective 4m, through-beam 15m, relay 3A or NPN/PNP output, 90-250VAC/10-30VDC, IP55. - E3JK relay-output versions switch loads up to 3 A directly from the sensor's built-in relay contact. - E3JK diffuse-reflective (DS30) models detect at 0.5 m or 1.5 m (±10%); retro-reflective (R4) models detect at 4 m (±10%); through-beam (5DM) models detect at 5 m (relay) or up to 15 m (transistor). - E3JK relay versions are offered for 90-250 VAC, 10-30 VDC, or universal 10-250 V AC/DC supply. - The E3JK through-beam transistor line is available only in normally-open (NO) logic — E3JK-5DM2 and E3JK-5DM4 (normally-closed) do not exist in this series. ### E3Z Compact Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/e3z-compact-photoelectric-sensor/ E3Z compact photoelectric sensor: 31×11×22mm housing, diffuse-reflective 30-100/200/300mm or through-beam 5m detection, NPN/PNP output, IP65, 10-30VDC. - The E3Z series diffuse-reflective sensors are offered in three adjustable sensing ranges: 30-100mm, 30-200mm, and 30-300mm. - The E3Z series through-beam version has a sensing distance of 5 meters. - The E3Z series housing measures 31 × 11 × 22 mm and is made of PBT plastic. - The E3Z series is rated IP65 and operates on a 10-30VDC supply. ### H-M Series M12/M18 Through-beam Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/h-m-series-m12-m18-through-beam-photoelectric-sensor/ H-M series M12/M18 through-beam photoelectric sensors: 16 models, 2-15 m sensing range, NPN/PNP NO/NC outputs, 10-30VDC, nickel-plated brass barrel. - The H1815M through-beam sensor pair reaches a sensing range of up to 15 m +/-10% from a single M18 emitter/receiver pair. - The H-M series through-beam sensors are available in four sensing-range classes: 2 m, 5 m (M12), 5 m and 15 m (M18), each with +/-10% tolerance. - N2 and P2 output versions provide complementary normally-open (N.O.) and normally-closed (N.C.) signals from a single receiver. - The M12 barrel measures M12x63 mm and the M18 barrel measures M18x73 mm, both machined from nickel-plated brass. ### How the H-M Through-Beam Sensor Pair Works The emitter sends a continuous optical beam across the detection zone to the receiver. With the path clear, the receiver sees the emitter; when a target blocks the path, the receiver changes its output state. That opposed layout is why the H-M **through-beam photoelectric sensor** is much less dependent on the target's colour or gloss than a sensor that must read reflected light. The trade-off is mechanical: both sides need mounting and power/cabling, and the two M12 or M18 barrels must share the same optical axis. Choose the range class from the real installed span, then allow alignment margin rather than specifying exactly at the published maximum. ### H122M, H125M, H1805M or H1815M? Range class | Barrel | Published sensing range | Start here when H122M | M12 × 63 mm | 2 m ±10% | the span is short and the mounting hole is M12 H125M | M12 × 63 mm | 5 m ±10% | a compact M12 pair must cover a wider conveyor H1805M | M18 × 73 mm | 5 m ±10% | the installation uses an M18 barrel H1815M | M18 × 73 mm | 15 m ±10% | a gate, portal or long conveyor needs the longest H-M class After the range/body choice, select N1 or P1 for a single normally-open output, or N2/P2 for complementary normally-open plus normally-closed outputs. For other sensing principles and housings, return to the [photoelectric sensor range](/products/photoelectric-sensor/). ### H-series Micro Diffuse Photoelectric Sensor (M3-M6) URL: https://www.daidisensor.com/products/photoelectric-sensor/h-series-micro-diffuse-photoelectric-sensor/ H-series M3-M6 micro diffuse photoelectric sensors: 32 models, 5-200mm adjustable range, NPN/PNP, IP65 stainless housing, 940nm infrared, 10-30VDC. - The H-series M3-M6 micro diffuse photoelectric sensors offer adjustable sensing ranges from 5mm up to 200mm, depending on thread size and model. - Each of the four thread sizes (M3, M4, M5, M6) in the H-series is available in two adjustable sensing-range bands, with NPN/PNP output and N.O./N.C. logic, for a total of 32 part numbers. - The H-series sensor housing is stainless steel with an IP65 protection rating. - The H-series uses a 940nm infrared emitter and operates on a 10-30VDC supply with a 120mA load current, 5ms response time, and 100Hz response frequency. ### H08 / R12 Series Micro Diffuse-Reflective Photoelectric Sensor (M8/M12) URL: https://www.daidisensor.com/products/photoelectric-sensor/h08-r12-series-micro-diffuse-reflective-photoelectric-sensor/ H08/R12 series M8/M12 threaded diffuse-reflective photoelectric sensors: 20 models, sensing range up to 300mm, IP65 nickel-plated brass, 10-30VDC NPN/PNP. - The H08/R12 series comprises 20 models across M8 and M12 threaded barrel sizes, each available in NPN/PNP and N.O./N.C. output combinations. - The R12300 model offers the longest sensing range in the series, rated 30-300 mm, using an M12 threaded metal barrel. - H08 and R12 sensors use an infrared light source at 850/940 nm and operate on 10-30VDC supply voltage. - The sensor housing is nickel-plated brass with an IP65 ingress protection rating. ### JNS18 & JNK18 Series M18 Diffuse Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/jns18-and-jnk18-series-m18-diffuse-photoelectric-sensor/ JNS18 & JNK18 M18 diffuse photoelectric sensors: 10-30 VDC, IP65, sensing range 100 mm to 3 m, NPN/PNP, N.O./N.C. outputs, no reflector required. - The JNK18-300D variant of the JNK18 series delivers a rated diffuse sensing distance of 3 m in a standard M18-threaded barrel housing. - The JNS18 series is available in three sensing-distance options — 10 cm, 30 cm, and 50 cm — each offered with NPN or PNP, normally-open or normally-closed output. - The JNK18 series' DN2 and DP2 output variants provide complementary normally-open and normally-closed signals simultaneously from a single sensor. - Both JNS18 and JNK18 series operate on a 10-30 VDC supply and carry an IP65 ingress-protection rating. ### PZ-CM10 Vision-based One-touch Teach Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/pz-cm10-vision-based-one-touch-teach-photoelectric-sensor/ PZ-CM10 vision-based one-touch teach photoelectric sensor: SET-button teach, 3-wire NPN/PNP output, response time ≤0.5 ms, DC12-24V ±10%, IP65/IP66. - The PZ-CM10 completes target setup with a single press of its SET button, without external software or programming. - The PZ-CM10 uses a standard 3-wire output (brown +, blue -, black signal), with NPN or PNP selectable to order. - The PZ-CM10's rated response time is 0.5 milliseconds or less. - The PZ-CM10 operates on a DC12-24V ±10% supply and carries an IP65/IP66 ingress protection rating. ### PZ-MK10 One-Touch Teach Laser Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/pz-mk10-one-touch-teach-laser-sensor/ PZ-MK10 one-touch teach laser sensor: setting distance 10-500mm on light backgrounds, 10-200mm on dark backgrounds, 200mm diffuse mode. 3-wire, 2m cable. - The PZ-MK10 laser sensor is taught via a single push-button (one-touch teach) against the sensor's actual installed background. - With a light background or reflector present, the PZ-MK10's specified setting distance range is 10-500 mm. - Against a dark background, the PZ-MK10's specified setting distance range is 10-200 mm. - With no background present, the PZ-MK10 operates as a standard diffuse-reflective photoelectric sensor at a 200 mm detection distance. ### QF-35 M8 Diffuse-Reflective Photoelectric Sensor URL: https://www.daidisensor.com/products/photoelectric-sensor/qf-35-m8-diffuse-reflective-photoelectric-sensor/ QF-35 M8 diffuse-reflective photoelectric sensor: 35 mm sensing distance, IP66 stainless housing, 940 nm infrared, DC12-24V supply, 3 ms response, NPN/PNP. - The QF-35 M8 diffuse-reflective photoelectric sensor has a rated sensing distance of 35 mm, calibrated against a 30×30 mm white paper target. - The QF-35 is rated IP66 per IEC 60529, designed to withstand powerful water jets. - The QF-35 uses a 940 nm infrared emitter and offers NPN (QF-35N1) or PNP (QF-35P1) Normally Open output. - The QF-35's operate/reset response time is 3 ms or less, and its output is rated for loads up to 80 mA at DC24V or below. ## color-mark-sensor ### CZ-V1 High-Precision Color Sensor URL: https://www.daidisensor.com/products/color-mark-sensor/cz-v1-high-precision-color-sensor/ CZ-V1 high-precision color sensor: 4-channel amplifier discriminates 1,000+ colors, teaches 4 target colors, 200 μs HSP response, NPN/PNP 12-24VDC output. - The CZ-V1 color sensor amplifier discriminates more than 1,000 colors and can teach up to four target colors in a single unit. - CZ-V1 (NPN, max. 40 VDC / 100 mA) and CZ-V1P (PNP) are the two amplifier output versions of the CZ-V1 color sensor. - The CZ-V1 offers two response-time settings: 200 μs in HSP mode and 1 ms in FINE mode. - The CZ-V1 supports selectable match (ON on match) or mismatch (ON on mismatch) output logic. ### CZ-V21 RGB Digital Color Sensor (Amplifier-Separate Type) URL: https://www.daidisensor.com/products/color-mark-sensor/cz-v21-rgb-digital-color-sensor/ CZ-V21 RGB digital color sensor: 8 channels, 3,000+ color discrimination, NPN/PNP output, and two interchangeable sensor heads for glare or texture. - The CZ-V21 amplifier has 8 independent detection channels and can be configured to detect 4 or 8 colors simultaneously. - The CZ-V21 discriminates over 3,000 colors. - The CZ-C35 sensor head has a detection distance of 28–52mm; the CZ-C37 sensor head has a detection distance of 11–20mm and is a luster-cancellation, small-beam-spot design for glossy or metallic surfaces. - The CZ-V21 (NPN) outputs a maximum of 40VDC and the CZ-V21P (PNP) outputs a maximum of 30VDC, each with 4 channels rated at 100mA per channel, 200mA total. ### FS-S72 Color Mark Sensor (FS-S72 NPN / FS-S72P PNP) URL: https://www.daidisensor.com/products/color-mark-sensor/fs-s72-color-mark-sensor/ FS-S72 color mark sensor: 24VDC, 18-28mm sensing range, sub-200μs response. NPN (FS-S72) or PNP (FS-S72P) output for packaging and labeling machines. - The FS-S72 color mark sensor has a response time of 200 microseconds or less. - The FS-S72 operates on a 24VDC power supply with a sensing distance of 18-28mm. - FS-S72 provides NPN open-collector output; FS-S72P provides PNP open-collector output, within the same sensor series. - The FS-S72 supports two operating modes: mark (contrast) detection mode and color mode, switching output ON on mark detection or on color match respectively. ### JNS-W70 / JNS-W500 Long-Range Color Mark Sensor URL: https://www.daidisensor.com/products/color-mark-sensor/jns-w70-jns-w500-long-range-color-mark-sensor/ JNS-W70/JNS-W500 long-range color mark sensor: 30-70mm/50-500mm range, white LED, switchable NPN/PNP, N.O./N.C. logic, IO-Link, 10-30VDC, IP65 rated. - The JNS-W500 color mark sensor detects at 50-500mm and the JNS-W70 at 30-70mm. - Both JNS-W70 and JNS-W500 use a white LED emitter. - The JNS-W series provides switchable NPN/PNP open-collector output (≤30V, ≤100mA, residual voltage ≤2V) with selectable N.O./N.C. logic on a single unit. - The JNS-W series supports IO-Link communication in addition to discrete output. ### PZ-LX101 Color Mark Sensor URL: https://www.daidisensor.com/products/color-mark-sensor/pz-lx101-color-mark-sensor/ PZ-LX101 color mark sensor: NPN output, selectable Light-ON/Dark-ON logic, 8-25mm sensing range, 12-24VDC supply, for packaging and labeling lines. - The PZ-LX101 is an NPN-output color mark (contrast) sensor with a sensing range of 8-25 mm. - The PZ-LX101 offers a selectable Light-ON / Dark-ON output, allowing one sensor to detect either a dark mark on a light background or a light mark on a dark background. - The PZ-LX101 operates on a 12-24 VDC supply. - The PZ-LX101 provides two operating modes, MARK mode and C/C1 mode, each with an independently rated response time. ## proximity-sensor Category URL: https://www.daidisensor.com/products/proximity-sensor/ ### Choose an Industrial Proximity Sensor in Four Steps Start with the target, not the thread size. An **inductive proximity sensor** detects metal without contact; a **capacitive proximity sensor** can also detect non-metal targets such as plastic, glass, powder or liquid when the application is validated. Then choose the mounting geometry, sensing distance and output that match the machine input. The catalogue below covers cylindrical M3, M4, M5, M6, D6.5, M8, M12, M18 and M30 bodies, compact square housings, cable and quick-disconnect versions, flush and non-flush mounting, NPN or PNP outputs, and selected 2-wire DC or AC families. Use the decision map first, then open the matching series card for its exact model table. ### Choose Inductive or Capacitive by Target Material Choose inductive for repeatable detection of steel, aluminium and other metal machine parts. It is the default for gear teeth, cylinder positions, fixtures and end stops because the sensing principle responds to conductive metal rather than surface colour. Choose capacitive when the target is non-metal or must be detected through a non-metal wall; the catalogue includes M8, M12, M18, M30 and square capacitive families. Capacitive sensing is more application-dependent because material density, moisture, container wall thickness and nearby metal affect the usable setting. For a new material, treat the published nominal range as a selection starting point and validate the actual target before production release. Question | Inductive | Capacitive Best target | metal | metal and non-metal Typical duty | position, end stop, gear or fixture | plastic, glass, powder or liquid presence Common bodies here | M3 to M30 and square | M8 to M30 and Q20 square Application check | target metal changes usable distance | validate material, wall and surrounding metal ### M8, M12, M18 or M30 Proximity Sensor? Thread size controls far more than the mounting hole. Small M8 and sub-M8 sensors fit grippers, compact slides and narrow brackets; M12 is the general machine-building size; M18 and M30 bodies provide room for longer nominal distances and more robust mounting. If the existing hole must stay, choose the thread first and compare only the ranges available in that body. For a common threaded industrial range, start with the [M8 inductive series](/products/proximity-sensor/m8-inductive-proximity-sensors/), [M12 short-body series](/products/proximity-sensor/m12-inductive-proximity-sensors/), or [M18/M30 inductive series](/products/proximity-sensor/m18-m30-inductive-proximity-sensors/). For a cost-led M8–M30 platform, compare the [JNX/JNS economy family](/products/proximity-sensor/economy-inductive-proximity-sensors-m8-m12-m18-m30/). Body class | Use it when | Representative family M3–M6 / D6.5 | the installation is smaller than a standard M8 mount | [M3/M4/M5 separate-amplifier](/products/proximity-sensor/m3-m4-m5-short-body-separate-amplifier-inductive-proximity-switches/), threaded M4/M5/M6, D6.5 M8 | compact industrial mounting and short sensing distances | M8 inductive or M8 capacitive M12 | general machine position sensing | M12 short-body, JM12 connector, capacitive M12 M18 / M30 | longer nominal distance or a larger mounting body | M18/M30 inductive and capacitive families Square | a threaded barrel cannot fit or the sensing face must turn sideways | Q08, Q10, Q17/Q18C, Q25/Q30/Q40 ### Select the Mounting Style and Required Clearance A flush sensor can be embedded with its sensing face level with surrounding metal. A non-flush sensor needs free space around the sensing face because its field extends sideways as well as forward. Non-flush versions often provide a longer nominal distance in the same diameter, but installing one inside a metal pocket can reduce range or keep the output permanently active. Our model names and tables identify the mounting style for each family; do not infer it from body length alone. The visual below shows the mechanical difference before you choose the bracket; the [proximity sensor selection guide](/guides/how-to-choose-a-proximity-sensor/) keeps the detailed comparison in one place. ### NPN, PNP, 2-Wire, Cable or Connector For 3-wire DC sensors, match NPN or PNP to the receiving PLC input rather than choosing by region or habit. Normally-open and normally-closed logic is a separate decision. The [NPN vs PNP output guide](/guides/npn-vs-pnp-outputs-explained/) explains the current path; the series pages list the actual suffixes. Choose a molded cable where vibration resistance and a sealed permanent lead matter. Choose a quick-disconnect connector where maintenance teams need fast replacement without pulling a new cable. The [JM12 M12 connector series](/products/proximity-sensor/jm12-series-m12-inductive-proximity-sensor-with-m12-aviation-connector/) and [JM M18/M30 connector series](/products/proximity-sensor/jm-series-m18-m30-connector-type-inductive-proximity-sensors/) are the direct starting points. If the circuit specifically requires two conductors, use the [DC 2-wire family](/products/proximity-sensor/m8-m12-m18-m30-dc-2-wire-inductive-proximity-sensors/) or [AC 2-wire family](/products/proximity-sensor/m12-m18-m30-2-wire-ac-inductive-proximity-sensors/) instead of adapting a 3-wire output. ### Compact and Long-Range Proximity Sensor Options For compact fixtures, published family envelopes begin with M3/M4/M5 models around 0.6–1.5 mm and M8 families around 1–6 mm. Standard M12 inductive families extend through the published options on their product pages, while selected M18/M30 non-flush inductive models publish the longest catalogue distances in this category, up to 40 mm. Selected adjustable capacitive families publish options up to 30 mm. These are family envelopes, not a promise for every model or target. The selected housing, flush/non-flush mounting and target material determine the rated distance, and a production design should keep operating margin instead of mounting exactly at the catalogue limit. ### What Affects the Cost of a Proximity Sensor? Quotation depends on sensing principle, body size and shape, sensing distance, flush/non-flush construction, 2-wire or 3-wire circuit, AC or DC supply, NPN/PNP and N.O./N.C. logic, molded cable or connector, cable length and order quantity. We do not publish one flat price because those choices change the part itself. For a comparable quotation, send the target material, required operating gap, housing size, mounting style, supply voltage, output logic, cable or connector preference and quantity. ### Category FAQ Q: What does an industrial proximity switch detect? A: An inductive proximity switch detects metal. A capacitive proximity switch can detect metal and selected non-metal targets, but its final sensing performance should be validated with the actual material and mounting. Q: How do I choose an M8, M12, M18 or M30 proximity sensor? A: Start with the available mounting hole and mechanical clearance, then confirm that the body size offers the required nominal sensing distance and output. Larger threads often offer longer ranges, but the exact value belongs to the series model table. Q: What is the difference between flush and non-flush proximity sensors? A: Flush models can be embedded level with surrounding metal. Non-flush models require clearance around the active face; they often reach farther, but a metal pocket can disturb their field. Q: Should I choose an NPN or PNP proximity sensor? A: Match the sensor to the PLC or controller input circuit. NPN is a sinking output and PNP is a sourcing output; neither is universally better. Q: Can a capacitive proximity sensor detect through a plastic container? A: Potentially, yes. The usable result depends on the container wall, target dielectric properties, moisture and surrounding metal, so validate the real container and fill material before production use. Q: Which proximity sensor should I use when a cylindrical body will not fit? A: Use a square family and choose its sensing-face direction. The catalogue includes Q08, Q10, Q17/Q18C, Q20 and Q25/Q30/Q40 bodies for compact, side-sensing or larger-distance layouts. ### D6.5 Series Inductive Proximity Sensors (Ultra-Short 18mm / Y-Type / 35mm / 45mm) URL: https://www.daidisensor.com/products/proximity-sensor/d6-5-series-inductive-proximity-sensors/ D6.5 Series inductive proximity sensors: 6.5mm diameter, 10-30VDC, 1-6mm sensing distance, NPN/PNP NO/NC, IP67, ultra-short 18mm/Y-type/35mm/45mm bodies. - This inductive proximity sensor series has a 6.5mm barrel diameter and is offered in four body configurations: ultra-short (18mm), right-angle Y-type (18mm), 35mm, and 45mm. - Sensing distance across the series ranges from 1mm to 6mm, depending on body length and flush/non-flush mount type. - The series operates on 10-30VDC, 3-wire DC wiring, with selectable NPN or PNP output and NO or NC switching. - Response time is 0.1ms on most models (0.2ms on the 4mm non-flush 35mm variant), with switching frequency up to 2kHz on the shortest-range models. ### Economy Inductive Proximity Sensors M8/M12/M18/M30 (JNX/JNS Series) URL: https://www.daidisensor.com/products/proximity-sensor/economy-inductive-proximity-sensors-m8-m12-m18-m30/ Economy inductive proximity sensors (JNX/JNS series) in M8/M12/M18/M30, sensing 1-15mm, IP67, 10-30VDC 3-wire, NPN/PNP NO/NC, -25°C to +70°C, 0.1ms response. - The M8/M12/M18 economy inductive proximity sensors in this series have a response time of 0.1ms and a switching frequency of up to 1KHz. - Sensing distance ranges from 1mm (M8 flush) up to 15mm (M30 non-flush) across the JNX/JNS economy series. - All models operate on 10-30VDC, 3-wire DC wiring, with NPN or PNP output in normally-open or normally-closed configuration. - The sensor housing is rated IP67 and the operating temperature range is -25°C to +70°C. ### Economy M4/M5/M6 Inductive Proximity Switches (Export-Grade) URL: https://www.daidisensor.com/products/proximity-sensor/economy-m4-m5-m6-inductive-proximity-switches/ Economy M4/M5/M6 inductive proximity switches, export-grade: 1.0mm sensing distance, NPN/PNP, NO/NC output, copper body, 25-35mm lengths for tight spaces. - The M4 non-threaded proximity switch (JJ4A3-1 series) has a 30mm body length and 4mm diameter, with a confirmed sensing distance of 1.0mm ± 10%. - The M5 threaded proximity switch (JJ5A3-1 series, M5 x 0.5 thread) has a 30mm body length, is rated for flush (shielded) mounting, and has a confirmed sensing distance of 1.0mm ± 10%. - The M6 threaded proximity switch (JJ6A3-1 series, M6 x 0.75 thread) has a 35mm body length, is rated for flush (shielded) mounting, and has a confirmed sensing distance of 1.0mm ± 10%. - Each size in this series is available in NPN output (model suffix ZB) or PNP output (model suffix ZA), with normally-open (suffix X) or normally-closed (suffix Y) contact configuration. ### High-Quality Threaded M4/M5/M6 Inductive Proximity Sensors URL: https://www.daidisensor.com/products/proximity-sensor/high-quality-threaded-m4-m5-m6-inductive-proximity-sensors/ High-Quality Threaded M4/M5/M6 inductive proximity sensor series: M4 0.6-1.0mm, M5/M6 0.8-1.5mm sensing distance, NPN/PNP, NO/NC output, 3-wire DC, 44 models. - The M4/M5/M6 threaded inductive proximity sensor series is available in three thread sizes: M4x0.5 (25mm body), M5 (25mm body), and M6 (35mm body). - Each size in this series offers selectable NPN or PNP output combined with normally-open (NO) or normally-closed (NC) logic. - M4 models cover sensing distances of 0.6mm, 0.8mm, and 1.0mm; M5 and M6 models cover 0.8mm, 1.0mm, 1.2mm, and 1.5mm. - All models in this series use a 3-wire DC wiring connection. ### JD Series 3-Wire Connector-Type Inductive Proximity Sensors D6.5-M8 / D6.5-M12 URL: https://www.daidisensor.com/products/proximity-sensor/jd-series-3-wire-connector-type-inductive-proximity/ JD Series D6.5 inductive proximity sensor with M8/M12 connector: 6.5mm probe, 1-6mm sensing distance, 10-30VDC, IP67, NPN/PNP NO/NC 3-wire output. - The JD Series inductive proximity sensor has a 6.5mm probe diameter and terminates in an M8 (3-pin) or M12 (4-pin) circular connector instead of a fixed cable. - Flush-mount JD Series variants provide 1mm, 2mm, or 3mm sensing distance; non-flush variants provide 2mm, 4mm, or 6mm. - The JD Series operates on 10-30VDC, with a maximum load current of 150mA and an overload protection point of 180mA. - The JD Series is rated IP67 and operates across a -25°C to +70°C ambient temperature range. ### JM Series M18/M30 Connector-Type Inductive Proximity Sensors (M12 Quick-Disconnect) URL: https://www.daidisensor.com/products/proximity-sensor/jm-series-m18-m30-connector-type-inductive-proximity-sensors/ JM series M18/M30 inductive proximity sensors with M12 4-pin quick-disconnect connector, 10-30VDC, IP67, sensing distance up to 40mm, NPN/PNP NO/NC. - The JM18 series is available in flush-mount sensing distances of 5mm, 8mm, and 12mm, and non-flush sensing distances of 8mm, 16mm, and 20mm. - The JM30 series is available in flush-mount sensing distances of 10mm, 15mm, and 22mm, and non-flush sensing distances of 15mm, 25mm, and 40mm. - JM series inductive proximity sensors operate on a 10-30VDC supply with an IP67 protection rating. - The JM series terminates in an M12, 4-pin connector for quick-disconnect wiring instead of a fixed cable. ### JM12 Series M12 Inductive Proximity Sensor with M12 Aviation (Quick-Disconnect) Connector URL: https://www.daidisensor.com/products/proximity-sensor/jm12-series-m12-inductive-proximity-sensor-with-m12-aviation-connector/ JM12 series M12x1 inductive proximity sensor with M12 4-pin aviation connector for tool-free swap. 2-10mm sensing distance, NPN/PNP, NO/NC, IP67, 10-30VDC. - The JM12 series is a DC 3-wire inductive proximity sensor with an M12x1 threaded barrel and an M12 4-pin aviation connector, available in 40mm, 50mm, and 68mm body lengths. - Sensing distance across the JM12 series ranges from 2mm to 10mm, depending on body length and flush/non-flush mounting type. - The JM12 series operates on 10-30VDC with a maximum load current of 150mA and includes built-in short-circuit protection with an overload trip point of 180mA. - The JM12 housing is rated IP67 and carries an operating temperature range of -25°C to +70°C. ### JM8 Series Quick-Disconnect (Connector-Type) Inductive Proximity Sensors URL: https://www.daidisensor.com/products/proximity-sensor/jm8-series-quick-disconnect-inductive-proximity-sensors/ JM8 series M8 inductive proximity sensors use an M8 or M12 quick-disconnect connector, 1-6mm sensing distance, IP67, 10-30VDC, NPN/PNP, NO/NC, 32-70mm bodies. - The JM8 series inductive proximity sensor uses an M8 or M12 quick-disconnect connector, allowing sensor replacement without cutting or re-terminating cable. - JM8 sensing distances are confirmed at 1mm, 2mm, 3mm, 4mm, and 6mm across model codes JM801 through JM806. - JM8 series operates on 10-30VDC three-wire DC power with a maximum load current of 150mA and no-load current under 10mA. - The JM8 housing carries an IP67 protection rating and is specified for -25°C to +70°C operation. ### M12 Inductive Proximity Sensors (22mm/35mm/45mm Short-Body) URL: https://www.daidisensor.com/products/proximity-sensor/m12-inductive-proximity-sensors/ M12x1 inductive proximity sensors in 22mm, 35mm and 45mm bodies with flush/non-flush mounting, NPN/PNP NO/NC outputs, IP67 housing, and 0.1ms response time. - This M12x1 inductive proximity sensor series is offered in three body lengths - 22mm, 35mm, and 45mm - each available in flush and non-flush mounting. - Sensing distance ranges from 2mm to 6mm for flush-mount variants and 4mm to 10mm for non-flush variants across the 22/35/45mm body family. - The sensor operates on 10-30VDC three-wire DC supply with a maximum load current of 150mA and no-load current below 10mA. - Response time is as fast as 0.1ms, with switching frequency up to 1.5KHz on the fastest variant. ### M12/M18/M30 2-Wire AC Inductive Proximity Sensors URL: https://www.daidisensor.com/products/proximity-sensor/m12-m18-m30-2-wire-ac-inductive-proximity-sensors/ M12/M18/M30 2-wire AC inductive proximity sensors wire directly into 20-250V AC circuits, 2-16mm sensing distance, IP67 rated, -25 to 70C, 24 models. - This M12/M18/M30 series is a 2-wire inductive proximity sensor designed to be wired directly in series with a 20-250V AC load, using only its brown and blue leads. - Sensing distances in this AC series range from 2mm (M12, flush mount) to 16mm (M18/M30, non-flush mount). - The series is rated IP67 with an operating temperature range of -25°C to +70°C. - Maximum load current is 400mA, with a rated inrush current of 5A for 20ms and a no-load leakage current below 1.8mA. ### M12/M18/M30 Metal-Housing Capacitive Proximity Sensors (Cable Type) URL: https://www.daidisensor.com/products/proximity-sensor/m12-m18-m30-metal-housing-capacitive-proximity-sensors/ M12/M18/M30 nickel-plated metal capacitive proximity sensors with adjustable sensing distance, IP67 rating, and 1.5ms response time for level detection. - Covers M12, M18, and M30 threaded capacitive proximity sensors in a nickel-plated metal, cable-type housing. - Each model has a factory-defined, field-adjustable sensing distance rather than a single fixed trip point. - Offered in flush and non-flush mounting styles, with non-flush models marked by a "T" suffix. - Every model is available in NPN or PNP output, with NO or NC logic, on standard 3-wire DC wiring. ### M18/M30 Capacitive Proximity Sensors with M12 Connector (Plug-in Type) URL: https://www.daidisensor.com/products/proximity-sensor/m18-m30-capacitive-proximity-sensors-with-m12-connector/ M18/M30 capacitive proximity sensors with a detachable M12, 4-pin connector, 2-5mm to 2-30mm adjustable sensing distance, IP67, 1.5ms response, NPN/PNP NO/NC. - This series covers M18 and M30 threaded capacitive proximity sensors terminated in a detachable M12, 4-pin connector instead of a fixed cable. - Adjustable sensing distances range from 2-5mm (M18 flush, R1805) to 2-30mm (M30 non-flush, R3030T) across the eight models in this series. - The housing is nickel-plated metal, sealed to IP67, per the manufacturer's selection table. - Response time is 1.5ms and the stated overload current protection point is 240mA across both M18 and M30 sizes. ### M18 / M30 Inductive Proximity Sensors (35mm & 55mm Body Length) URL: https://www.daidisensor.com/products/proximity-sensor/m18-m30-inductive-proximity-sensors/ M18/M30 inductive proximity sensors in 35mm short or 55mm standard body, flush and non-flush, 5-40mm sensing distance, IP67, NPN/PNP, NO/NC, 10-30VDC 3-wire. - The M18/M30 inductive proximity sensor series covers sensing distances from 5mm (M18 flush) up to 40mm (M30 non-flush). - Each thread size - M18 and M30 - is available in a 35mm short body or a 55mm standard body. - All models operate on 10-30VDC, 3-wire DC wiring, with NPN or PNP output in normally-open or normally-closed configuration. - Response time ranges from 0.2ms to 2ms and switching frequency ranges from 80Hz to 1KHz across the series, depending on sensing distance and mounting type. ### M3/M4/M5 Short-Body Separate-Amplifier Inductive Proximity Switches (15mm) URL: https://www.daidisensor.com/products/proximity-sensor/m3-m4-m5-short-body-separate-amplifier-inductive-proximity-switches/ M3/M4/M5 short-body (15mm) unthreaded inductive proximity switches: D3/D4/M5 diameters, 0.6-1.5mm sensing distance, NPN/PNP output, NO/NC, 3-wire DC wiring. - The M3/M4/M5 short-body inductive proximity switch series has a 15mm body length, shorter than the same brand's standard 25mm unthreaded M3/M4 and threaded M5 proximity switches. - M3 short-body proximity switches are available with 0.6mm, 0.8mm, or 1.0mm sensing distance. - M4 and M5 short-body proximity switches are available with 0.8mm, 1.0mm, 1.2mm, or 1.5mm sensing distance. - Every diameter and sensing distance in this series is offered in both NPN and PNP output, each with NO (normally-open) or NC (normally-closed) logic. ### M3 / M4 Non-Threaded (Thread-less) Inductive Proximity Switches URL: https://www.daidisensor.com/products/proximity-sensor/m3-m4-non-threaded-inductive-proximity-switches/ M3/M4 non-threaded inductive proximity switches: D3/D4mm barrel, 0.6-1.5mm sensing distance, NPN/PNP NO/NC output, 10-30VDC 3-wire, IP67, -25C to +70C. - The M3 non-threaded inductive proximity switch has an outer diameter of 3mm and an overall length of 25mm, with a 0.6mm, 0.8mm, or 1.0mm sensing distance. - The M4 non-threaded inductive proximity switch (D4x25mm) offers 0.8mm, 1.0mm, 1.2mm, or 1.5mm sensing distance. - Both the M3 and M4 non-threaded proximity switch versions are rated IP67 with an operating temperature range of -25C to +70C. - The series is available in NPN or PNP DC 3-wire output, each in normally-open (NO) or normally-closed (NC) configuration. ### M8 Capacitive Proximity Switch (Metal Housing, Cable Type) URL: https://www.daidisensor.com/products/proximity-sensor/m8-capacitive-proximity-switch/ M8 capacitive proximity switch detects metal and non-metal targets (liquids, powders, wood, glass, plastic) at 1mm/2mm range, IP67, M8x45mm, NPN/PNP 10-30VDC. - The M8 capacitive proximity switch offers a 1mm sensing distance in flush mounting and 2mm in non-flush mounting. - This M8 capacitive proximity switch measures M8x45mm and uses a nickel-plated brass metal housing rated IP67. - The sensor operates on 10-30VDC and provides NPN or PNP output in normally open (NO) or normally closed (NC) configuration. - Response time is 1.5ms with a switching frequency of 100Hz. ### M8 Inductive Proximity Sensors (Short/Flush, Y-Type, 35mm, 45mm) URL: https://www.daidisensor.com/products/proximity-sensor/m8-inductive-proximity-sensors/ M8x1 inductive proximity sensors in straight, Y-type, 35mm and 45mm bodies. Sensing 1-6mm, IP67, -25 to +70C, NPN/PNP NO/NC 3-wire DC, 0.1ms response time. - The M8 inductive proximity sensor family (18mm, Y-type, 35mm, 45mm bodies) offers sensing distances from 1mm (flush) to 6mm (non-flush, 45mm body). - All variants in this M8 sensor family are rated IP67 with an operating temperature range of -25°C to +70°C. - Response time is 0.1ms on the 18mm, Y-type, and short-range taps of the 35mm/45mm M8 proximity sensors. - Each M8 sensing-distance variant is available in NPN or PNP output with NO (normally open) or NC (normally closed) switching logic. ### M8/M12 Capacitive Proximity Switch with Connector (Plug-in, Aviation Connector) URL: https://www.daidisensor.com/products/proximity-sensor/m8-m12-capacitive-proximity-switch-with-connector/ M8/M12 capacitive proximity switch with M8 3-pin or M12 4-pin aviation connector, 10-30VDC, NPN/PNP NO/NC, sensing 1mm to 1-6mm adjustable, IP65/IP67. - The M8 capacitive proximity switch (M8 connector version) offers a 1mm±10% sensing distance in flush mounting and 2mm±10% in non-flush mounting. - The M12 capacitive proximity switch (M12 connector version) has a potentiometer-adjustable sensing distance of 1-2mm, 1-3mm, 1-4mm, or 1-6mm depending on model. - The M8 series uses an M8 3-pin plug-in connector; the M12 series uses an M12 4-pin plug-in connector. - The M8 housing is stainless steel (M8x1 thread, 60mm body length); the M12 housing is nickel-plated brass (M12x1 thread, 69mm body length). ### M8/M12/M18/M30 DC 2-Wire Inductive Proximity Sensors URL: https://www.daidisensor.com/products/proximity-sensor/m8-m12-m18-m30-dc-2-wire-inductive-proximity-sensors/ M8/M12/M18/M30 2-wire DC inductive proximity sensors: 10-30VDC, IP67, 1-25mm sensing distance, flush/non-flush mount, NO/NC output, -25C to +70C. - This inductive proximity sensor series is available in four barrel sizes — M8, M12, M18, and M30 — each offered in flush and non-flush mount versions. - The DC 2-wire versions in this series operate on 10-30VDC and carry an IP67 protection rating. - Sensing distance across the series ranges from 1mm (M8, flush mount) to 25mm (M30, non-flush mount). - Each model is available with either normally-open (D1) or normally-closed (D2) output. ### Q08 Series Square Inductive Proximity Sensor (Q082.5T / Q082.5F) URL: https://www.daidisensor.com/products/proximity-sensor/q08-series-square-inductive-proximity-sensor/ Q08 series square inductive proximity sensor (Q082.5T/Q082.5F): 8x8mm body, 2.5mm sensing distance, NPN/PNP NO/NC DC 3-wire output for tight machine spaces. - The Q08 series square inductive proximity sensor has a body cross-section of 8mm x 8mm. - The Q082.5T variant uses side-sensing (detection from the side face) with a body length of 23mm. - The Q082.5F variant uses top-sensing (detection from the top face) with a body length of 25mm. - Both Q082.5T and Q082.5F are rated at a 2.5mm sensing distance. ### Q10 Series Square Inductive Proximity Switch (Q102.5 / Q104) URL: https://www.daidisensor.com/products/proximity-sensor/q10-series-square-inductive-proximity-switch/ Q10 series (Q102.5/Q104) square inductive proximity switches: 2.5mm or 4mm side-face sensing, NPN/PNP NO/NC output, 10-30VDC, IP67, -25 to +70 C. - The Q102.5 inductive proximity switch has a rated sensing distance of 2.5mm; the Q104 variant has a rated sensing distance of 4mm. - Both Q102.5 and Q104 use a side-face (lateral) sensing element rather than a front-facing sensing tip. - The Q10 series body measures approximately 10mm wide by 27-30mm long, with a thickness of 6mm (Q102.5, ABS housing) or 6.5mm (Q104, PBT housing). - The Q10 series is a 3-wire DC inductive proximity switch operating on 10-30VDC, available in NPN or PNP output with normally open (NO) or normally closed (NC) logic. ### Q17 / Q18C Square Inductive Proximity Sensor URL: https://www.daidisensor.com/products/proximity-sensor/q17-q18c-square-inductive-proximity-sensor/ Q17/Q18C square inductive proximity sensors: 5mm or 8mm sensing distance, NPN/PNP output, NO/NC logic, 3-wire DC, PBT housing for metal target detection. - The Q17 and Q18C are square-body inductive proximity switches offered with 5mm or 8mm sensing distance. - Both Q17 and Q18C series provide NPN and PNP output types with NO (normally open) and NC (normally closed) switching logic, selectable via the model code. - The Q17 housing measures 17 x 17 x 28 mm and includes a front-mounted LED status indicator. - Q17 and Q18C use a PBT plastic housing per the manufacturer's selection chart. ### Q20 Square Capacitive Proximity Switch URL: https://www.daidisensor.com/products/proximity-sensor/q20-square-capacitive-proximity-switch/ Q20 square capacitive proximity switch: 10mm sensing distance, NPN/PNP output, NO/NC logic, flush or non-flush mounting, for non-metal target detection. - The Q20 capacitive proximity switch has a fixed sensing distance of 10 mm. - The Q20 series is available in NPN and PNP output types, each with normally-open (NO) and normally-closed (NC) contact logic. - The Q20 uses a square housing and a 3-wire DC connection. - The Q2010N1 and Q2010P1 models are flush-mountable, while the Q2010N2T and Q2010P2T models use a non-flush mounting design. ### Q25 / Q30 / Q40 Square Inductive Proximity Sensors URL: https://www.daidisensor.com/products/proximity-sensor/q25-q30-q40-square-inductive-proximity-sensors/ Q25, Q30 and Q40 square inductive proximity sensors: 10-20mm sensing distance, 10-30VDC 3-wire NPN/PNP NO/NC output, IP67 PC housing, up to 500Hz switching. - The Q25, Q30 and Q40 are square-body inductive proximity sensors with sensing distances of 10-15mm (Q25/Q30) and 15-20mm (Q40). - Each Q25/Q30/Q40 model is available with NPN or PNP output, in normally-open (N1/P1) or normally-closed (N2/P2) configuration. - The sensors are powered by 10-30VDC via a 3-wire DC connection and are rated IP67. - Housing dimensions are 25x25x35mm (Q25), 30x30x38mm (Q30), and 40x40x53mm (Q40), with a PC plastic housing. ### RS Series M12/M18/M30 Capacitive Proximity Sensor (ABS Plastic Housing) URL: https://www.daidisensor.com/products/proximity-sensor/rs-series-m12-m18-m30-capacitive-proximity-sensor/ RS series capacitive proximity sensor: M12/M18/M30 threads, ABS plastic housing, NPN/PNP output, NO/NC logic, flush and non-flush mount, 3-wire DC. - The RS series capacitive proximity sensor is available in three threaded sizes — M12, M18, and M30 — with an ABS plastic housing. - Each RS series thread size offers NPN and PNP output, each in normally-open (NO) and normally-closed (NC) switching logic. - The RS series is offered in flush-mount (standard) and non-flush-mount (T-suffix) body styles. - The RS series is wired as a 3-wire DC sensor. ### SN04 / TL-W5E1 Series Square Inductive Proximity Switch URL: https://www.daidisensor.com/products/proximity-sensor/sn04-tl-w5e1-series-square-inductive-proximity-switch/ SN04 and TL-W5E1 series square inductive proximity switches: 4-7mm sensing distance, NPN/PNP output, NO/NC logic, DC12-24V supply for PLC panels. - The SN04 inductive proximity switch has an 18x18x34mm square body and a rated sensing distance of 4mm. - The TL-W5 series offers two sensing distances in the same body style: 5mm (E suffix) and 7mm (F suffix). - TL-W5E1 measures 42x25x10mm with two Phi3.5mm mounting holes and a 50mm output cable. - The SN04/TL-W5 family is available in both NPN and PNP output types, with suffix '1' for normally-open (NO) and suffix '2' for normally-closed (NC) logic. ## safety-relay Category URL: https://www.daidisensor.com/products/safety-relay/ ### Safety Relay Modules for E-Stop, Light Curtain and Door Circuits A **safety relay module** evaluates a dual-channel signal from an emergency-stop device, safety light curtain, safety door interlock or two-hand control and uses forcibly guided contacts to interrupt hazardous machine functions. It is the evaluation stage between the field safety device and the machine contactors — not the sensor, PLC or contactor itself. DAIDISIKE lists two modules here. The [DA31 e-stop safety relay](/products/safety-relay/da31-emergency-stop-safety-relay-module/) is the 22.6 mm ultra-slim option with dual-channel PNP/NPN input and a separate transistor status output for a PLC. The current [DQSRN safety relay module](/products/safety-relay/dqsrn-safety-relay-module/) page lists a 45 mm DIN-rail housing, but source documents conflict on its dimensions, so confirm the exact shipped variant. ### DA31 vs DQSRN Safety Relay Module Both pages publish four DIP-switch selectable input modes: emergency stop, safety light curtain OSSD, safety door interlock and two-hand control. Both publish 24 VDC operation, sub-30 ms response and 3 N.O. + 1 N.C. forcibly guided contact arrangements. The selection is therefore about the documented housing, input compatibility and auxiliary signal requirement rather than a claim that one is universally ‘more safe’. Published attribute | DA31 | DQSRN Housing width | 22.6 mm | 45 mm listed; source documents conflict, confirm variant Dual-channel input | PNP or NPN | see product input-mode specification Input modes | e-stop / OSSD / door / two-hand | e-stop / OSSD / door / two-hand Relay contacts | 3 N.O. + 1 N.C. forcibly guided | 3 N.O. + 1 N.C. forcibly guided Separate PLC status output | transistor signaling output <500 mA / 24 VDC | not listed as a separate transistor output Response | <30 ms | <30 ms ### Select by Input Device and OSSD Compatibility For an e-stop circuit, confirm that the device channels and selected relay input mode form the required safety function; the [DA31 e-stop safety relay](/products/safety-relay/da31-emergency-stop-safety-relay-module/) page contains its exact input and output selection. For an OSSD light curtain, choose the published OSSD input mode and verify output polarity and test-pulse compatibility from the exact device documents. For a guard switch, verify whether the field device outputs mechanical contacts, NPN or PNP transistor channels. DA31 is also the catalogue option for a safety relay module with PLC status output: its separate transistor signaling output can report machine run/stop status to a PLC without consuming a safety contact. This is status reporting, not programmable safety logic. The [DQSRN safety relay module](/products/safety-relay/dqsrn-safety-relay-module/) is the alternative when its documented housing and terminal arrangement fit the panel. ### What a Safety Relay Does — and Does Not Do The relay evaluates the selected safety input and switches its safety contacts. It does not sense a person, read a door mechanically, or replace the output contactors. It also does not make the whole circuit Category 4 / PL e / SIL 3 by itself: the achieved level belongs to the complete safety function, including the input device, logic, output elements, architecture and validation. Neither DA31 nor DQSRN is presented here as a programmable safety relay or safety PLC. If the application needs several independent zones, configurable logic or networked diagnostics, do not force a single-function relay into that role. ### Category FAQ Q: What does a safety relay module do? A: It evaluates a safety input and changes forcibly guided output contacts so downstream contactors can remove power from hazardous machine functions. Q: Which safety relay is suitable for a light curtain OSSD output? A: DA31 and DQSRN both list an OSSD input mode. Confirm the exact light-curtain output polarity, test pulses and circuit documentation before final wiring. Q: Can DA31 send status to a PLC? A: Yes. Its published specification includes a separate transistor signaling output below 500 mA / 24 VDC for status reporting. Q: Can DA31 execute configurable safety logic? A: No. It uses DIP switches to select one of four published input modes; it is not presented as a programmable logic controller. Q: Do DA31 or DQSRN include manual reset, automatic reset or EDM? A: The current product data does not publish those functions. Do not assume they are present; confirm the exact circuit documentation and use a controller architecture that explicitly provides any required reset or external-device monitoring function. Q: Does a Cat.4 / PL e safety relay make the complete machine circuit PL e? A: Not automatically. The complete safety function must be designed and validated to the required level, and its result is limited by the architecture and every component in the chain. Q: What is the main selection difference between DA31 and DQSRN? A: DA31 is 22.6 mm wide and lists PNP/NPN dual-channel input plus a separate PLC status output. DQSRN's current page lists 45 mm, but its source dimensions conflict; confirm the exact shipped variant and compare the terminal arrangement. ### DA31 Emergency-Stop Safety Relay Module URL: https://www.daidisensor.com/products/safety-relay/da31-emergency-stop-safety-relay-module/ DA31 emergency-stop safety relay module: ultra-slim 22.6 mm width, Category 4/PL e/SIL 3, PNP/NPN dual input, <30 ms response, AC-1 6A/250VAC contacts. - The DA31 emergency-stop safety relay module measures 112 × 99.5 × 22.6 mm, with a housing width of 22.6 mm. - DA31 provides dual-channel safety input compatible with both PNP and NPN signal types. - DA31's output stage combines 3 normally-open and 1 normally-closed forcibly guided relay contacts with a separate solid-state signaling output rated below 500 mA / 24 VDC. - DA31 offers four DIP-switch selectable safety input modes: emergency stop, safety light curtain OSSD, safety door interlock, and two-hand control. ### How DA31 Fits Between the Safety Device and PLC The field device—an e-stop, OSSD light curtain, guard interlock or two-hand control—provides the dual-channel input. DA31 evaluates the selected input mode and switches its forcibly guided relay contacts for the machine contactor circuit. A separate transistor signaling output can report status to a standard PLC input without consuming one of the safety contacts. That PLC connection is status reporting only. DA31 is a DIP-switch-selected **safety relay module with PLC status output**; it is not a programmable safety relay and the PLC does not replace the module's safety evaluation. ### Select the DA31 Input Mode by Field Device Published DA31 mode | Field device | What to confirm Emergency stop | dual-channel e-stop device | channel/contact arrangement and complete stop circuit Safety light curtain OSSD | OSSD-output safety light curtain | PNP/NPN signal type and device documentation Safety door interlock | dual-channel guard switch | mechanical contact or transistor signal compatibility Two-hand control | two-hand operating device | device timing and full safety-function validation Only one published input mode is selected for the module's safety function. If the machine needs several independent zones or programmable logic, use an architecture designed for that job instead of treating DA31 as a safety PLC. Compare both catalogue modules on the [safety relay category page](/products/safety-relay/). ### DQSRN Safety Relay Module URL: https://www.daidisensor.com/products/safety-relay/dqsrn-safety-relay-module/ DQSRN safety relay module: DIP-switch selectable E-stop, light curtain OSSD, door interlock and two-hand control inputs, Cat.4/PLe/SIL3, 3NO+1NC contacts. - DQSRN is a DIN-rail safety relay module offering four DIP-switch selectable input modes: E-stop button, safety light curtain OSSD (single/dual-channel PNP), safety door interlock, and two-hand control device. - DQSRN is rated Category 4 / Performance Level e per EN ISO 13849-1 and SIL 3 per IEC 61508. - DQSRN's output stage provides 3 normally-open safety contacts and 1 normally-closed auxiliary contact, using a forcibly guided (positively driven) contact design. - DQSRN's contacts use AgSnO2 material with 0.2 µm gold plating, rated down to a minimum load of 10 mA/5 V and up to AC-1 6A/250VAC, AC-15 4A/240VAC, DC-1 6A/24VDC, max 12A. ## safety-light-curtain Category URL: https://www.daidisensor.com/products/safety-light-curtain/ ### 17 Series, One Decision Path A **safety light curtain** is a pair of profiles that project a fence of infrared beams across a machine opening; break any beam and the curtain's outputs drop, stopping the hazardous motion before a hand reaches it. That one sentence covers all seventeen series below — what separates them is *which* opening, *which* body part, and *which* environment they are built for. You do not need to read seventeen datasheets. Five questions eliminate series until one family remains: **environment** first (washdown? explosive atmosphere? outdoors?), then **resolution** (finger, hand or body detection), then **protected height**, then **span and layout**, and finally **budget and housing space**. The map below walks that exact path, and every stop on it links to a series card further down this page. ### Pick by Resolution: 7.5 mm Finger Grade to 200 mm Perimeter Resolution — the beam pitch — decides what the curtain can detect, which in turn decides how close to the danger point it may be mounted. The fine end of our range is the DQT4 family's 7.5 mm pitch (14 mm object detection, protective heights 90–5970 mm); the everyday workhorses are the DQC and DQA with eight pitches from 10 to 200 mm; the JER and MK economy lines cover 10–40 mm duties where the budget leads the specification. The ladder below matches each pitch band to the body part it protects and the series that build it. As a rule of thumb: the finer the pitch, the closer the curtain may sit to the tooling — which is often the difference between a machine an operator can actually work at and one they have to reach around. Pitch | Detects | Series coverage | Typical placement 7.5 mm | finger (14 mm object) | DQT4 fine grade | closest to the tooling 10–14 mm | finger | DQC · DQA · DQE · MQ · JER · MK | press feed openings 20–30 mm | hand | DQC · DQA · DQT4 · DQZ · DQB · MQ | standard guarding distance 40 mm | arm / wrist | DQC · DQA · MQ · JER · MK | wider access openings 80 mm | body segment | DQC · DQA · DQSA | access ways, perimeters 200 mm | whole body | DQC · DQA long-range | multi-beam perimeter posts ### Pick by Housing: Ultra-Thin, Mini, and Zero Blind Zone On retrofits, the mounting slot often chooses the series before any optical spec gets a vote. The DQB and its optically-synchronised twin DQBT run a 15 × 30 mm side-emitting profile that drops into an 18 mm gap between guide rails; the DQZ does the same trick front-emitting at 17.2 × 30 mm; the MK squeezes a full **light curtain sensor** into 25 × 23 mm for bench-top machines; the new [MQ Essence Edition](/products/safety-light-curtain/mq-essence-safety-light-curtain/) packs optical synchronisation — no wire at all between transmitter and receiver — into a 29 × 30 mm body with M12 plug-and-play cables. The DQO's speciality is its ends: first and last beams sit just 6.75 mm from the housing tips, so the protected field can start almost flush against a machine shoulder — the answer when a standard curtain's end blind zone would leave a reachable gap. The cross-sections below are drawn to a common scale. If your slot is the constraint, start here and let the profile pick the family; the optical specs inside each family then follow the resolution logic above. ### Pick by Span and Coverage: 3 m Standard to 40 m, and Mirror-Folded Perimeters Standard optical ranges run 0.3–3 m or 0.3–6 m, which covers most feed openings. Long beds and transfer lines step up to the DQA and DQT long-range grades, whose detection-distance classes reach 0.3–40 m; the DQT additionally scales to 72 beams for tall access ways. Perimeter work changes the geometry rather than the range: the DQSA area-protection system takes one transmitter/receiver pair plus one to three corner mirrors and folds the beams around two, three or four sides of a robot cell — protective heights to 3920 mm at 40 or 80 mm pitch, with one wiring point instead of four. For an **industrial safety light curtain** layout around a full cell, that mirror trick is routinely the difference between a tidy installation and a cable-tray project. ### Harsh Environments: Waterproof and Explosion-Proof Washdown lines take the DQR, whose 36 × 36 mm housing is IP65 as standard, with the DQRF special-order variant sealed to IP68 for lines that are hosed rather than wiped. For classified atmospheres, the FB explosion-proof series repackages our curtain optics in Ex-rated enclosures as an engineered-to-order build — describe the zone and the gas/dust group in the inquiry and the factory returns the matching construction rather than a catalogue guess. ### Outputs and Getting Into the Stop Circuit Electrically, the transistor-output families follow one discipline: NPN or PNP, 500 mA switching capacity, residual voltage under 1.5 V, with polarity, short-circuit and overload protection built in. Relay-output versions (and the controller-based systems) take AC 110–220 V supply and hand you dry contacts instead. The DQO and DQT4 families carry dual OSSD safety outputs for two-channel evaluation. The chain downstream is always the same shape: curtain outputs feed a safety relay or safety controller, whose force-guided contacts drive the machine contactors. Our [DA31 and DQSRN safety relay modules](/products/safety-relay/) are the catalogue-matched evaluation stage. If NPN-versus-PNP is the open question in your panel, the [output polarity guide](/guides/npn-vs-pnp-outputs-explained/) settles it in five minutes. Full wiring diagrams for every output type — including channel-by-channel drawings and reset options — are maintained in the DAIDISIKE engineering library on [fsddsk.com](https://www.fsddsk.com/safety-light-barrier-wiring-diagram); this page deliberately stays above pin level. ### Type Ratings, Stated Honestly Across this category the design baseline is the Type 4 architecture of IEC 61496 — dual-channel outputs and continuous self-monitoring on the families that carry it, stated on each series page in exactly those words. We write "designed to the Type 4 architecture" rather than waving certificates on a category page, because the certificate that matters is the one matched to the exact configuration you order, and those documents are supplied with the order paperwork. The JER and MK economy lines describe their levels in their own words on their own pages; the DD diffuse-reflection curtains are detection devices, not personnel protection, and say so prominently. If you are deciding how much Type you actually need to buy — where a Type 2 device is legitimately sufficient and where Type 4 is the only defensible choice — the guide [Type 2 vs Type 4 Safety Light Curtains](/guides/type-2-vs-type-4-safety-light-curtains/) covers the fault-behaviour difference, the PL mapping and the decision path in full. ### Safety, Measuring, or Press-Brake? Don't Buy the Wrong Family Three product families on this site share the light-curtain silhouette and share nothing else. This page is personnel protection. If the job is dimensioning, counting or profiling — data, not stopping machines — you want the [measuring light curtains](/products/measuring-light-curtain/), which carry no safety rating on purpose. And if the machine is a hand-fed press brake, a fixed curtain is the wrong physics entirely: the [press & press brake protection systems](/products/press-brake-protection/) move the guard with the ram. Thirty seconds spent here saves the classic wrong-family purchase. ### Category FAQ Q: What is a safety light curtain and how does it work? A: It is a transmitter/receiver pair projecting parallel infrared beams across a machine opening. Interrupting any beam switches the safety outputs off within milliseconds, and the downstream safety relay stops the hazardous motion. The device class is called an ESPE (electro-sensitive protective equipment) under IEC 61496. Q: What is the difference between a light curtain sensor and a safety light curtain? A: Construction is similar; duty is not. Detection and measuring grids report data and carry no safety rating — ours live in the [measuring light curtain category](/products/measuring-light-curtain/). A safety light curtain is engineered for personnel protection with self-monitored safety outputs and is the only kind that belongs in a protective stop circuit. Q: How is the price of a safety light curtain determined? A: By beam count and pitch (that is, protective height and resolution), detection-distance class, output form (transistor, relay, or controller system) and ingress rating. Two curtains with the same height can differ several-fold in price at different pitches, which is why we quote from your opening size and resolution need rather than publishing a flat price list. Q: What HS code do safety light curtains ship under? A: Tariff classification varies with the destination country's schedule, so we do not print a single code here. The commercial invoice and packing documents we issue carry the classification our export declarations use, and we can provide it before you order so your broker can pre-confirm the import side. Q: Which series should I look at first? A: General feed openings: [DQC](/products/safety-light-curtain/dqc-general-safety-light-curtain/), or the [MQ Essence Edition](/products/safety-light-curtain/mq-essence-safety-light-curtain/) when wiring simplicity matters (optical sync, M12 plug-and-play). Finest finger protection: the DQT4 7.5 mm grade. Narrow slots: DQB or DQZ. Long spans: DQA or DQT. Cell perimeters: DQSA with mirrors. Washdown: DQR/DQRF. Budget-led duties: JER or MK. Every series card above opens the full model table. ### DCE Automation Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dce-automation-safety-light-curtain/ DCE safety light curtain: 30x30 mm housing, 10/20/30/40 mm pitch, up to 72 beams, protected height to 2840 mm, 0.3-6 m range, NPN/PNP, IP65. Type 4 / Cat. 4 design. - The DCE is a through-beam (transmitter/receiver) safety light curtain designed to the Type 4 architecture of IEC 61496-1/-3 and Category 4 (PLd) of ISO 13849-1, per the DAIDISIKE catalog, which also cites TUV and UL testing and EN 61496-3:2019 Type 4, EN 13849-1:2015 Cat4 PLd. Certification documents are available on request. - DCE offers four beam pitches -- 10, 20, 30 and 40 mm. Detection accuracy (minimum detectable object) is printed in the catalog as 18, 28 and 48 mm for the 10/20/40 mm pitches respectively (pitch + 8 mm); the 30 mm pitch's detection-accuracy figure is not printed in the catalog's parameter table. - DCE response time is 15 ms or less, and it rejects ambient light up to 10,000 lux at an incidence angle of 5 degrees or more; the catalog separately lists 3,000 lux (incandescent) and 10,000 lux (sunlight) tolerance measured at the receiver face. - DCE sensing distance is 0.3-3 m (model-code letter A) or 0.3-6 m (letter B). The housing cross-section is 30 x 30 mm, smaller than the 51 x 35 mm housing of the DQA/DQC series. ### DD / DDOF Single-Sided Area Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dd-diffuse-reflection-area-light-curtain/ Buy the right single-sided area light curtain: DD diffuse models (DD0440-DD5040, to 2000 mm) or DDOF time-of-flight models (DDOF0440-DDOF5040, to 4000 mm, no dead zone, colour-independent). 40 mm pitch, NPN+PNP fitted, factory direct. - Order code is the whole decision: the DDOF prefix buys per-beam time-of-flight ranging (4000 mm, no dead zone, distance window taught with one key), the DD prefix buys diffuse energy sensing (2000 mm, dead zone possible, steps 1-9) - everything mechanical is shared between them. - 48 standard models in total: DDOF0440 through DDOF5040 and DD0440 through DD5040, each series in 24 even-beam tiers from 4 to 50 beams at the fixed 40 mm pitch. - Height mathematics printed on the 2026-08 factory sheet: detection height H = beam count x 40 mm (160-2000 mm), overall housing length L = H + 49 mm (209-2049 mm) - the 49 mm being two 12 mm end caps plus the mounting allowance. - The DDOF's background suppression is geometric, not optical trickery: each beam measures the distance to whatever reflects it, and anything outside the taught window - including the wall behind the line - is simply not reported. ### DQA Long-distance Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqa-long-distance-safety-light-curtain/ DQA long-range through-beam safety light curtain: 10-200 mm pitch, 4-32 beams, 0.3-40 m range, response <=15 ms, IP65, NPN/PNP/relay. Type 4 / Cat. 4 design. - The DQA is designed to the Type 4 architecture of IEC 61496-1/-3 and to Category 4 of ISO 13849-1, as stated in the DAIDISIKE light-curtain catalog. Certification documents are available on request. - The DQA is covered by TÜV SÜD Attestation of Conformity No. E8A 104143 0001 for electromagnetic compatibility (EU EMC Directive 2014/30/EU), tested to EN 61000-6-2:2005 and EN 61000-6-4:2007/A1:2011. - The DQA sensing distance is selectable by model code across eight steps — 0.3-3 m, 0.3-6 m, 0.3-10 m, 0.3-15 m, 0.3-20 m, 0.3-25 m, 0.3-30 m and 0.3-40 m (codes A to H). - The DQA offers eight beam pitches — 10, 14, 20, 25, 30, 40, 80 and 200 mm — with a corresponding detection accuracy (minimum detectable object) of 18, 22, 28, 33, 38, 48, 88 and 208 mm respectively (pitch + 8 mm). ### DQB Ultra-thin (Side-emitting) Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqb-ultra-thin-safety-light-curtain/ DQB ultra-thin, side-emitting safety light curtain: 15 x 30 mm cross-section, 20/40 mm pitch, protective height 100-1240 mm, NPN/PNP transistor output. - The DQB safety light curtain has a 30 x 15 mm housing cross-section (x L, the transmitter/receiver length), with the light axes emitting from the 15 mm side face of the housing rather than the front - a side-emitting, ultra-thin design. - DQB's model-code legend and technical parameter table list three light-axis pitches - 10, 20 and 40 mm - with detection accuracy (minimum detectable object) of 18, 28 and 48 mm respectively (pitch + 8 mm); the catalog's populated model list, however, only provides specific model numbers for the 20 mm and 40 mm pitches. - The 20 mm pitch DQB models range from 6 to 32 light axes (protective height 100-620 mm); the 40 mm pitch models range from 4 to 32 light axes (protective height 120-1240 mm), each in steps of 2, with protective height = light axis pitch x (axis count - 1). - DQB uses transistor output - NPN or PNP, normally open or normally closed, selectable by model-code letter (A = NPN NC, B = PNP NC, C = NPN NO, D = PNP NO, default A) - wired via a circular aviation connector with a dedicated cable: 4-core on the transmitter, 5-core on the receiver. ### DQBT Ultra-thin Optical-sync Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqbt-ultra-thin-optical-sync-safety-light-curtain/ DQBT ultra-thin safety light curtain with optical sync — no sync cable between emitter and receiver. 10/20/40 mm pitch, <=15 ms response, 0.3-3 m, NPN/PNP output. - DQBT's emitter and receiver synchronize via an optical signal instead of a wired sync cable — the catalog's feature list states "采用光同步技术" (optical synchronization technology), and the DQBT wiring diagram shows only local power/output wiring on each side, with no sync wire running between the two towers. - DQBT is offered in three beam pitches per the catalog's own DQBT spec tables: 10 mm, 20 mm and 40 mm. - At 10 mm pitch, DQBT's spec table runs cleanly from an 8-beam unit (DQBT08/10-70, 70 mm protected height) to a 100-beam unit (DQBT100/10-990, 990 mm protected height), in steps of 2 beams. - At 20 mm pitch, the table runs from 6 beams (DQBT06/20-100) up through 198 beams (DQBT198/20-3940); a further row lists 3980 mm protected height (i.e., 200 beams by the series' own H = pitch x (beams-1) formula) but its printed model number reads "DQBT100/20-3980" rather than the expected DQBT200 — the exact top-end model number needs confirming. ### DQC General Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqc-general-safety-light-curtain/ DQC general-purpose through-beam safety light curtain: 10-200 mm pitch, 4-32 beams, 0.3-6 m range, <=15 ms, IP65, 30x30 mm housing. Type 4 / Cat. 4 design. - The DQC is designed to the Type 4 architecture of IEC 61496-1/-3 and to Category 4 of ISO 13849-1, as stated in the DAIDISIKE light-curtain catalog. Certification documents are available on request. - The DQC is covered by TÜV SÜD Attestation of Conformity No. E8A 104143 0001 for electromagnetic compatibility (EU EMC Directive 2014/30/EU), tested to EN 61000-6-2:2005 and EN 61000-6-4:2007/A1:2011. - The DQC standard sensing distance is 0.3-3 m (model code A) or 0.3-6 m (model code B); for longer spans the DAIDISIKE DQA long-range curtain covers 0.3-40 m on the same platform. - The DQC offers eight beam pitches — 10, 14, 20, 25, 30, 40, 80 and 200 mm — with a corresponding detection accuracy (minimum detectable object) of 18, 22, 28, 33, 38, 48, 88 and 208 mm (pitch + 8 mm). ### DQE Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqe-safety-light-curtain/ DQE economical through-beam safety light curtain: 10-200 mm pitch, 4-72 beams, heights to 3800 mm, 0.3-3 m range, <=15 ms, NPN/PNP. Type 4 / Cat. 4 design. - The DQE is designed to the Type 4 architecture of IEC 61496-1/-3 and to Category 4 of ISO 13849-1, as stated in the DAIDISIKE light-curtain catalog. Certification documents are available on request. - The DQE is covered by TÜV SÜD Attestation of Conformity No. E8A 104143 0001 for electromagnetic compatibility (EU EMC Directive 2014/30/EU), tested to EN 61000-6-2:2005 and EN 61000-6-4:2007/A1:2011. - The DQE offers five beam pitches — 10, 20, 40, 80 and 200 mm — with a corresponding detection accuracy (minimum detectable object) of 18, 28, 48, 88 and 208 mm (pitch + 8 mm). - The DQE standard sensing distance is 0.3-3 m; 0.3-6 m is available as model code B, and longer distances are made to order. ### DQO Zero Blind-zone Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqo-zero-blind-zone-safety-light-curtain/ DQO zero blind-zone safety light curtain: first beam just 6.75 mm from the housing end, 10/20/30 mm pitch, height 90-2130 mm, <=15 ms, IP65, dual NPN/PNP OSSD. - Per the DAIDISIKE catalog's dimension drawing, DQO's first and last active beam positions are offset only 6.75mm (dimensions P and J) from the physical ends of the transmitter/receiver housing, for all three pitch options (10/20/30mm) — the catalog markets this as its “zero blind-zone” (无盲区) design, paired with a per-beam segment indicator LED on the receiver. - DQO is offered in 10mm, 20mm and 30mm beam pitch, with a detection accuracy (minimum detectable object) of 18mm, 28mm and 38mm respectively (pitch + 8mm). - DQO beam count runs from 12 to 70 axes at 10mm pitch, 6 to 72 axes at 20mm pitch, and 4 to 72 axes at 30mm pitch, giving protected heights from 90mm to 2130mm (protected height = pitch x (beam count - 1)). - DQO's response time is <=15ms and the housing is rated IP65, with a 30x28mm transmitter/receiver cross-section. ### DQR / DQRF Waterproof Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqr-dqrf-waterproof-safety-light-curtain/ DQR/DQRF waterproof safety light curtain: IP65 standard, IP68 enclosure on request, 10-80 mm pitch, height 50-2480 mm, <=15 ms, NPN/PNP. Type 4 / Cat. 4 design. - DQR is rated IP65 as standard; adding the F suffix (DQRF) fits an additional waterproof outer enclosure that the catalog markets as "超强IP68级防水特殊定制" (super-strong IP68-grade waterproof, special customization), raising the rating to IP68 -- this is presented as a special-order upgrade, not a standard off-the-shelf spec. - The DQR is covered by TÜV SÜD Attestation of Conformity No. E8A 104143 0001 for electromagnetic compatibility (EU EMC Directive 2014/30/EU), tested to EN 61000-6-2:2005 and EN 61000-6-4:2007/A1:2011. - The DQR(F) series offers seven beam-pitch options -- 10, 14, 20, 25, 30, 40 and 80 mm -- covering 4 to 32 beams depending on pitch, with protected height spanning 50 mm to 2480 mm across the catalog's full model list. - Detection accuracy (minimum detectable object) is explicitly published for six of the seven pitches: 18 / 22 / 28 / 33 / 38 / 48 mm for the 10 / 14 / 20 / 25 / 30 / 40 mm pitches respectively; the catalog's base parameter table does not state a figure for the 80 mm pitch. ### DQSA Area Protection Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqsa-area-protection-light-curtain/ DQSA area-protection light curtain: mirror-folded beam guards 2-4 sides of a zone, up to 40 m single-face, 40/80 mm spacing, <=15 ms. Type 4 / Cat. 4 design basis. - DQSA is an area-protection light curtain that uses passive deflection mirrors to fold a single emitter/receiver pair's beam path around 2, 3, or 4 sides of a guarded zone, per the DAIDISIKE catalog. - DQSA's maximum protected distance is capped by face count: up to 40 m for a single face (no mirrors), 20 m for two faces, 15 m for three faces, and 12 m for four faces. - DQSA is available in 40 mm or 80 mm beam spacing, with beam counts from 4 to 72 (40 mm pitch, up to DQSA72/40-2840, a 2840 mm protection height) or 4 to 50 (80 mm pitch, up to DQSA50/80-3920, a 3920 mm protection height). - DQSA's response time is under 15 ms including the controller, and the catalog states its design basis as IEC 61496-1/2, EN 61496-3:2019 Type 4, and EN ISO 13849-1:2015 Category 4 PLd -- design/test basis only; certification documents are available on request. ### DQT Long-distance Safety Light Curtain (Large Beam Count) URL: https://www.daidisensor.com/products/safety-light-curtain/dqt-long-distance-safety-light-curtain/ DQT long-distance safety light curtain: 10/20/40/80 mm pitch, up to 72 beams, height to 2900 mm, 0.3-40 m range, <=15 ms, IP65. Type 4 / Cat. 4 design. - The DQT is designed to the Type 4 architecture of IEC 61496-1/-3 and to Category 4 of ISO 13849-1, as stated in the DAIDISIKE light-curtain catalog. Certification documents are available on request. - The DQT is covered by TÜV SÜD Attestation of Conformity No. E8A 104143 0001 for electromagnetic compatibility (EU EMC Directive 2014/30/EU), tested to EN 61000-6-2:2005 and EN 61000-6-4:2007/A1:2011. - The DQT scales to 72 beam axes — more than double the DQA's 32 — giving protected heights up to about 2840 mm (for example DQT72/40-2840 = 72 beams, 40 mm pitch, 2840 mm protected height). - The DQT offers four beam pitches — 10, 20, 40 and 80 mm — with a corresponding detection accuracy (minimum detectable object) of 18, 28, 48 and 88 mm (pitch + 8 mm). ### DQT4 Type-4 Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqt4-type-4-safety-light-curtain/ DQT4 safety light curtain designed to Type 4 / Cat. 4 / PLe: 7.5/15/30 mm pitch (14/21/36 mm detection), up to 319 beams, 90-5970 mm protective height, IP65. - DQT4 offers three beam-pitch options — 7.5, 15, and 30 mm — with a corresponding detection accuracy (minimum detectable object) of 14 mm, 21 mm, and 36 mm respectively, per the DAIDISIKE catalogue's product parameter table. - At its finest 7.5 mm beam pitch, DQT4's catalogue-stated detection accuracy is 14 mm (described as finger-level protection), not the 7.5 mm pitch figure itself; the 15 mm pitch gives 21 mm accuracy (hand-level) and the 30 mm pitch gives 36 mm accuracy (arm/body-level). - DQT4 model numbers run from 15 to 319 beams at 7.5 mm pitch (step 8), 8 to 200 beams at 15 mm pitch (step 4), and a standalone 4-beam model plus 8 to 200 beams at 30 mm pitch (step 4) — giving protective heights from 90 mm up to 5970 mm. - The catalogue states DQT4's design basis as PLe and Category 4 per ISO 13849-1 (EN ISO 13849), SIL3, and Type 4 per EN/IEC 61496-1/-2 and GB/T 19436-1/-2. Certification documents are available on request. ### DQZ Ultra-thin (Front-emitting) Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/dqz-ultra-thin-safety-light-curtain/ DQZ ultra-thin front-emitting safety light curtain: 17.2 x 30 mm cross-section, 10-80 mm pitch, height 50-2480 mm, 0.3-3 m, <=15 ms, IP65. Type 4 / Cat. 4 design. - The DQZ housing is 17.2 x 30 mm in cross-section with the optical window on the narrow 17.2 mm front face -- the catalog's ultra-thin front-emitting design, intended for mounting depths too shallow for standard-body light curtains. - The DQZ is covered by TÜV SÜD Attestation of Conformity No. E8A 104143 0001 for electromagnetic compatibility (EU EMC Directive 2014/30/EU), tested to EN 61000-6-2:2005 and EN 61000-6-4:2007/A1:2011. - DQZ is offered in seven beam pitches -- 10, 14, 20, 25, 30, 40 and 80 mm -- which the catalog groups into finger (10/14 mm), palm (20/25 mm) and arm-or-body (30/40/80 mm) protection. - Detection accuracy (minimum detectable object) is beam pitch + 8 mm for the 10-40 mm pitches -- 18, 22, 28, 33, 38 and 48 mm respectively, per the catalog's technical-parameter table. The catalog's parameter table does not separately tabulate this figure for the 80 mm pitch. ### Explosion-proof Safety Light Curtain (Custom / FB Series) URL: https://www.daidisensor.com/products/safety-light-curtain/explosion-proof-safety-light-curtain-custom/ DAIDISIKE FB-series explosion-proof light curtains: GB3836-2010 enclosure, Ex nR IIC T6 Gc, Ex tb IIIC T80°C, custom-built to your on-site curtain model. - Enclosure engineered to GB3836-2010, marked Ex nR IIC T6 Gc, Ex tb IIIC T80°C. - Explosion-proof housing cross-section: 80mm x 80mm, drilling position tolerance ±0.5mm. - Cable entry: G1/2 / NPT1/2 (DN15, 4-fen) gland, accepts cable OD 7-10mm; ships with a 2m explosion-proof flexible conduit. - Sealing rubber: oil-resistant, corrosion-resistant national-standard RTY-III type. ### JER Economical Safety Light Curtain (Optical Synchronization) URL: https://www.daidisensor.com/products/safety-light-curtain/jer-economical-safety-light-curtain/ JER economical safety light curtain with optical sync (no sync cable): 10/14/20/40 mm pitch, up to 200 beams, height to 7960 mm, <=15 ms, IP65, NPN/PNP output. - The JER series synchronizes optically between transmitter and receiver (光同步技术) — there is no interconnecting sync cable to run between the two bars, which the catalog says simplifies wiring and cuts installation time. - JER's beam pitch comes in four steps — 10, 14, 20 and 40 mm — each with a corresponding detection accuracy (minimum detectable object) of 18, 22, 28 and 48 mm respectively (pitch + 8 mm). - JER's protected height equals beam pitch x (number of beams - 1); the catalog's model list runs from 70 mm (10 mm pitch, 8 beams) up to 7960 mm (40 mm pitch, 200 beams), with the footnote that beam count can be special-ordered up to 200 on any pitch. - JER's response time is <=15 ms, it rejects ambient light up to 10,000 lux at an incidence angle of >=5 degrees, and the catalog states it shields about 99% of interference signals (electromagnetic noise, strobe lighting, welding arc light). ### MK Mini Economical Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/mk-mini-economical-safety-light-curtain/ MK Mini economical safety light curtain: 25 x 23 mm housing, 10-40 mm pitch, 18-48 mm detection accuracy, up to 200 beams, height to 7960 mm, <=15 ms, NPN/PNP. - The MK Mini Economical Safety Light Curtain has a housing cross-section of 25 x 23 mm (transmitter/receiver), per the catalog's outline-dimension drawing and technical parameter table. - MK offers four beam pitches -- 10, 14, 20 and 40 mm -- with a corresponding detection accuracy (minimum detectable object) of 18, 22, 28 and 48 mm respectively (pitch + 8 mm). - MK's default sensing distance is 0.3-3 m (30-3000 mm); 0.3-6 m (30-6000 mm) is listed in the technical parameter table but, per the catalog's own footnote, requires a special order confirmed with customer service. - MK response time is <=15 ms, and it tolerates ambient light up to 10,000 lux at an incidence angle of 5 degrees or more (3,000 lux incandescent / 10,000 lux sunlight measured at the receiver face). ### MQ Essence Edition Safety Light Curtain URL: https://www.daidisensor.com/products/safety-light-curtain/mq-essence-safety-light-curtain/ MQ Essence Edition safety light curtain: 29×30 mm profile, ≤10 ms response, 10/20/40 mm pitch, 4–256 beams, 0.2–7 m range, optical sync with no sync wire, IP65, TUV/CE. - TUV / CE certified — certification covers product design and manufacturing process (per the series manual; ask for the certificate scope for your conformity file) - Response time ≤ 10 ms from beam interruption to output state change - 29 × 30 mm extruded-aluminium cross-section — one of the slimmest formats in its class - Beam pitch 10 / 20 / 40 mm → minimum detectable object Φ15 / Φ25 / Φ45 mm ## slot-sensor ### DD-303N / DD-403N Wide-slot Photoelectric Sensor URL: https://www.daidisensor.com/products/slot-sensor/dd-303n-dd-403n-wide-slot-photoelectric-sensor/ DD-303N / DD-403N wide-slot photoelectric sensors: 13 mm through-beam gap, 2.2×0.5 mm min. detectable object, 0.05 mm hysteresis, NPN output, DC5-24V. - The DD-303N / DD-403N series is a through-beam slot photoelectric sensor with a 13 mm detection gap. - Minimum detectable object size is 2.2×0.5 mm. - Hysteresis (differential travel) is 0.05 mm maximum. - The emitter is a 940 nm GaAs infrared LED. ### DD-670 Series Slot Photoelectric Sensor (Pin/Plug-in Connector Type) URL: https://www.daidisensor.com/products/slot-sensor/dd-670-series-slot-photoelectric-sensor/ DD-670 series plug-in connector slot photoelectric sensor: 5 mm slot (7 mm width), 20 models across 5 housing styles and 4 NPN/PNP output versions. - The DD-670 series is a plug-in connector slot photoelectric sensor with a 5 mm detection slot (7 mm slot width). - DD-670 series output versions are designated N (NPN, Light-ON indicator), P (PNP, Light-ON indicator), NA (NPN, Dark-ON indicator), and R (PNP, Dark-ON indicator). - The DD-670 series operation logic can be set via the connector's (L) terminal: open for Dark-ON, shorted to V+ for Light-ON. - The DD-670 series is available in five housing styles - standard (DD-670), L-type (DD-671), T-type (DD-672), and two close-mounting types (DD-673, DD-674) - for a total of 20 catalog part numbers across four output/indicator versions. ### DD-L25/45 Series Micro-slot (Micro U-shaped) Photoelectric Sensor URL: https://www.daidisensor.com/products/slot-sensor/dd-l25-45-series-micro-slot-photoelectric-sensor/ DD-L25/45 series micro-slot photoelectric sensor: 5 mm detection groove, 0.01 mm repeatability, 0.025 mm hysteresis, IP65, NPN/PNP, 20 models, 10 shapes. - The DD-L25/45 series micro-slot photoelectric sensor has a repeatability within 0.01 mm and hysteresis of 0.025 mm or less. - The DD-L25/45 series detects objects as small as 2 x 0.8 mm through a 5 mm detection groove. - The DD-L25/45 series is available in NPN and PNP outputs, each with selectable NO/NC (Light-ON/Dark-ON) operation, across 5 mounting shapes and 2 body sizes (25 mm and 45 mm), totaling 20 part numbers. - The DD-L25/45 series operates at DC5-24V +/-10% with current consumption under 15 mA and ships as a pre-wired type with a 1 m standard cable. ### EE-SX67 Series Slot-type Photoelectric Sensor (Photomicrosensor) URL: https://www.daidisensor.com/products/slot-sensor/ee-sx67-series-slot-type-photoelectric-sensor/ EE-SX67 series slot-type photoelectric sensor: 8 housing shapes (EE-SX670-EE-SX677), full NPN/PNP output, NO/NC wiring-selectable, 1m/2m/3m pre-wired cable. - The EE-SX67 series slot-type photoelectric sensor integrates a pre-aligned emitter and receiver in a single U-shaped housing, requiring no field beam alignment. - The EE-SX67 series is available in 8 distinct housing shapes (EE-SX670 through EE-SX677), each offered in both NPN and PNP output. - EE-SX67 sensors switch between normally-open and normally-closed operation by wiring: black wire for NO (Light-ON), white wire connected to brown wire for NC (Dark-ON). - Cable length on the EE-SX67 series is specified by suffix: D1 = 1 m, D2 = 2 m, D3 = 3 m. ### FS-KNS Slot Photoelectric Sensor (Plug-in Type) URL: https://www.daidisensor.com/products/slot-sensor/fs-kns-slot-photoelectric-sensor/ FS-KNS slot photoelectric sensor: 5 mm slot, 1 mm min. detectable object, 0.3 ms response, simultaneous NO+NC outputs, 5-24VDC, IP64 ABS housing. - The FS-KNS slot photoelectric sensor has a fixed 5 mm slot width and detects opaque objects down to 1 mm in diameter. - The FS-KNS outputs complementary NO and NC signals simultaneously on separate wires (white = NO, black = NC), without requiring output-mode selection. - The FS-KNS has a maximum response time of 0.3 ms and a maximum switching capacity of 100 mA. - The FS-KNS operates on a wide 5-24 VDC (±10%) supply range, compatible with both 5 V logic and 24 V industrial control circuits. ## laser-distance-sensor ### DDA-Y & DDB-Y Industrial Laser Distance Sensor (Phase-Shift) URL: https://www.daidisensor.com/products/laser-distance-sensor/dda-y-and-ddb-y-industrial-laser-distance-sensor/ DDA-Y & DDB-Y phase-shift laser distance sensors measure 0.2-100 m at ±(2mm+0.01% of distance), network up to 64 units via RS-485 Modbus RTU, IP67 housing. - The DDA-Y and DDB-Y series measure distance using the phase-shift principle, with a measurement error of ±(2 mm + d × 1/10000) at speed level 1 and 1 mm resolution. - Five range variants are available per series — DDA-Y10/20/30/50/100 and DDB-Y10/20/30/50/100 — all measuring from 0.2 m up to their rated maximum of 10, 20, 30, 50, or 100 m. - Up to 64 DDA-Y/DDB-Y units can be networked on a single RS-485 bus using Modbus RTU protocol, with station addresses 1 to 64. - The DDB-Y series analog output is field-configurable to 0-5 V, 0-10 V, 4-20 mA, 0-20 mA, or 0-24 mA, with a stated accuracy of 0.2%+0.5 mV for voltage and 0.2%+0.005 mA for current. ### DDK-F Long-range Laser Distance Sensor URL: https://www.daidisensor.com/products/laser-distance-sensor/ddk-f-long-range-laser-distance-sensor/ DDK-F long-range laser distance sensor: pulsed TOF ranging up to 200 m, ±3 cm accuracy, IP67, -30 to +60°C, 4-20mA/RS485 Modbus, 4 alarm outputs. - The DDK-F laser distance sensor uses pulsed time-of-flight (TOF) measurement, with a standard version covering 1-150 m at 50 Hz and a high-rate version covering 1-200 m at 100 Hz. - Stated accuracy of the DDK-F is ±3 cm at 100 m in clear weather and ±10 cm in fog and snow conditions. - The DDK-F operates from -30 to +60°C with an IP67 ingress protection rating. - The DDK-F provides 4-20 mA analog, RS-485 Modbus RTU, and four independently configurable NPN/PNP discrete alarm outputs simultaneously. ### DSK-CG Long-range Laser Distance Sensor URL: https://www.daidisensor.com/products/laser-distance-sensor/dsk-cg-long-range-laser-distance-sensor/ DSK-CG long-range laser distance sensor: 56 models, 1 m to 80 m range, 1 mm resolution, 1.5 mm + 0.05% accuracy, analog, RS-485 or switching outputs. - The DSK-CG series offers 56 model variants across 7 measuring ranges from 1 m to 80 m and 4 output types. - Standard-speed DSK-CG models provide 1 mm resolution with accuracy of 1.5 mm + 0.05% of the measured distance. - The DSK-CG measures targets within 30 m using diffuse reflection, without a reflector, regardless of target color, material or surface sheen. - High-speed DSK-CG models (100 Hz) specify 3 cm absolute accuracy, extending to 5 cm on low-reflectance targets and 7 cm on very-low-reflectance targets. ## outdoor-security-sensor ### DDSK-J Outdoor Laser Beam Detector URL: https://www.daidisensor.com/products/outdoor-security-sensor/ddsk-j-outdoor-laser-beam-detector/ DDSK-J outdoor laser beam detector covers up to 500 m per pair, with 100/200/300/500 m ranges, IP67 rating, and 660/980 nm laser wavelength options. - The DDSK-J1001 outdoor laser beam detector offers a selectable detection range of 100, 200, 300 or 500 meters. - DDSK-J1001 provides a choice of 660 nm visible red laser or 980 nm invisible infrared laser, both Class 1 (eye-safe). - Response (beam interruption) time on the DDSK-J1001 is selectable in four steps: 50, 100, 300 or 700 milliseconds. - The DDSK-J1001 has an IP67 ingress protection rating and accepts DC 9-30 V or AC 9-20 V power input. ## laser-switch-sensor ### DDSK Laser Diffuse Reflective Sensor M12 / DK Laser Diffuse Reflective Sensor M18 URL: https://www.daidisensor.com/products/laser-switch-sensor/ddsk-laser-diffuse-reflective-sensor-m12-dk-laser/ DDSK M12 / DK M18 laser diffuse reflective sensors: 650nm visible red laser, 20-500mm detection range, NPN/PNP, NO or NO+NC output, 10-30VDC, IP65. - The DDSK (M12) and DK (M18) laser diffuse reflective sensors use a 650nm visible red laser as the light source. - The DDSK M12 diffuse reflective sensor is available with a 20-200mm or 20-300mm detection distance. - The DK M18 diffuse reflective sensor is available with a 50-300mm or 70-500mm detection distance. - Both series operate on a 10-30VDC supply and carry an IP65 protection rating. ### DDSK Ultra-Miniature Laser Diffuse Reflective Sensor (M3/M4/M5/M6/M8) URL: https://www.daidisensor.com/products/laser-switch-sensor/ddsk-ultra-miniature-laser-diffuse-reflective-sensor/ DDSK ultra-miniature laser diffuse reflective sensor: M3/M4/M5/M6/M8 threaded barrels, 650nm laser, no reflector needed, 10-30VDC, IP65, NPN/PNP NO/NC. - The DDSK M3-M8 series is an ultra-miniature laser diffuse reflective photoelectric sensor using a 650nm red laser diode, available in M3, M4, M5, M6, and M8 threaded barrels. - Each thread size in the DDSK series offers two selectable detection-range variants, from 5-30mm (M3, short range) up to 20-200mm (M6/M8, long range). - The DDSK series operates on a 10-30VDC supply and is rated IP65 for dust and water-jet protection. - Output configuration is selectable between NPN and PNP, with normally-open (NO) or normally-closed (NC) switching logic, giving four output variants per detection-range option. ### DS Laser Through-Beam Sensor M12/M18 (50m) URL: https://www.daidisensor.com/products/laser-switch-sensor/ds-laser-through-beam-sensor-m12-m18/ DS Series M12/M18 laser through-beam sensors reach 50m detection range with a 650nm red laser, NPN/PNP output, NO or NO+NC switching, and IP65 protection. - The DS Series M12 and M18 laser through-beam sensors are both rated for a 50-meter detection distance between transmitter and receiver. - This sensor pair uses a 650nm red laser light source, operates on 10-30VDC, and carries an IP65 ingress protection rating. - Output configurations include NPN or PNP polarity, in either a 3-wire single normally-open (NO) output or a 4-wire output providing both NO and NC signals. - The M12 and M18 housings are threaded metal enclosures sized for standard nut-and-panel mounting. ### DS Miniature Laser Through-Beam Sensor (M3/M4/M5/M6/M8) URL: https://www.daidisensor.com/products/laser-switch-sensor/ds-miniature-laser-through-beam-sensor/ DS Miniature Laser Through-Beam Sensor: M3-M8 threaded housings, ~1.5mm laser spot, up to 20-30m range, NPN/PNP NO/NC output, 10-30VDC, IP65 rated. - The DS miniature laser through-beam sensor is available in M3, M4, M5, M6 and M8 threaded housings, with the M3-M6 versions rated up to 20m detection distance and the M8 version rated up to 30m. - Standard laser spot size on the M3/M4/M5 through-beam sensor is approximately 1.5mm, according to the manufacturer's selection table. - Each thread size is offered in both NPN and PNP transistor output, each available as normally-open (NO) or normally-closed (NC), giving four output variants per size. - The sensor operates on a 10-30VDC supply and is rated IP65 for dust and splash protection. ### DS Right-Angle (90°) Laser Through-Beam Switch M4 / M6 URL: https://www.daidisensor.com/products/laser-switch-sensor/ds-right-angle-laser-through-beam-switch-m4-m6/ DS M4/M6 90° right-angle laser through-beam switch: 650nm laser, 1.5-2mm spot, 20m detection range, 5ms response, IP65 stainless housing, NPN/PNP NO/NC. - The DS M4 and M6 right-angle laser through-beam switches both provide a 20m detection range against a standard 100x100mm white paper target. - The M4 version uses an M4x0.5mm thread with an 18.0mm overall body length; the M6 version uses an M6x0.75mm thread with a 20.0mm overall body length. - Standard laser spot size is approximately 1.5mm for the M4 model and approximately 2mm for the M6 model, both available with custom 0.5mm-1.0mm small-spot options. - Both models operate on 10-30VDC, offer NPN or PNP output with NO or NC selectable logic, and carry an IP65 protection rating in a stainless steel housing. ### F31 Square Laser Photoelectric Switch (Diffuse-Reflective & Through-Beam) URL: https://www.daidisensor.com/products/laser-switch-sensor/f31-square-laser-photoelectric-switch/ F31 square 650nm laser photoelectric switch: diffuse-reflective F31300 (50-300mm) or through-beam F3150M (up to 50m), 10-30VDC, IP65, NPN/PNP NO/NC output. - The F31 series is a 650nm visible red laser photoelectric switch available in diffuse-reflective (F31300, 50-300mm) and through-beam (F3150M, up to 50m) configurations. - F31 sensors operate on a 10-30VDC supply and are rated IP65. - Output is field-selectable between NPN and PNP, with normally-open (suffix 1) or normally-closed (suffix 2) switching action. - The F3150M through-beam variant is supplied as a matched transmitter-receiver pair, with the transmitter identified by a green indicator LED and the receiver by a yellow indicator LED. ### JNS Right-Angle (90°) Laser Diffuse Reflective Sensor — M4 / M6 URL: https://www.daidisensor.com/products/laser-switch-sensor/jns-right-angle-laser-diffuse-reflective-sensor-m4-m6/ JNS 90-degree right-angle laser diffuse sensor: M4 (10-50mm range) or M6 (15-100mm range), 650nm laser, NPN/PNP NO/NC output, 10-30VDC, IP65 rated. - The JNS M4 laser diffuse sensor has a rated detection range of 10-50mm. - The JNS M6 laser diffuse sensor has a rated detection range of 15-100mm. - The JNS 90° laser diffuse sensor uses a 650nm red laser light source. - The JNS series is available with NPN or PNP output, in normally-open (NO) or normally-closed (NC) configuration. ## laser-displacement-sensor ### DK-G Series Laser Displacement Sensor URL: https://www.daidisensor.com/products/laser-displacement-sensor/dk-g-series-laser-displacement-sensor/ DK-G series laser triangulation sensor: 30-400 mm reference distances, repeatability from 10 micron, switching, analog, or RS485 Modbus RTU output. - The DK-G series laser displacement sensor uses laser triangulation with a Class 2, 655 nm red semiconductor laser (max. output 1 mW). - DK-G offers five reference distances from 30 mm to 400 mm, with measuring ranges from ±5 mm to ±200 mm. - Repeatability starts at 10 μm at the 30 mm reference distance. - Response time is switchable at 1.5 ms, 5 ms, or 10 ms. ### DDK-G Laser Displacement Sensor 30-250 mm URL: https://www.daidisensor.com/products/laser-displacement-sensor/gdk-series-laser-displacement-sensor/ DDK-G laser displacement sensor (formerly GDK): 20 models across 30/50/85/120/250 mm reference distances, 2-75 um resolution, +/-0.1% F.S. linearity, IP64, 655 nm Class 2 laser. Full 2026 datasheet specs and English PDF download. - DDK-G is the current factory model code; GDK was the former catalogue listing of the same series - order codes on new paperwork read DDK-G30NM through DDK-G250P-485. - Twenty standard models: five reference distances (30/50/85/120/250 mm) x two polarities (N = NPN, P = PNP) x two interfaces (M = analog current or voltage, -485 = RS485). - Resolution follows the grade: 2 / 5 / 10 / 30 / 75 um in high-resolution mode, coarsening to 4-150 um in fast mode - the nearer the reference distance, the finer the reading. - Full-scale linearity holds +/-0.1% through the four nearer grades and relaxes to +/-0.3% on the 250 mm grade - for the G30 that bounds deviation within roughly 8 um over its 8 mm span. ### LK-F Series CMOS Laser Displacement Sensor URL: https://www.daidisensor.com/products/laser-displacement-sensor/lk-f-series-cmos-laser-displacement-sensor/ LK-F series CMOS laser displacement sensor: 16 models, 30-400mm reference distance, up to 10μm repeatability, switching + 0-5V/4-20mA analog output, IP67. - The LK-F series offers 16 model variants across five reference distances (30, 50, 100, 200 and 400 mm), each available in NPN and PNP output logic. - M-type LK-F sensors provide both a discrete switching output and an analog output (0-5 V or 4-20 mA, field-selectable in PRO mode) from a single unit. - At its 30 mm reference distance, the LK-F sensor achieves a measuring range of ±5 mm with 10 μm repeatability. - At its 400 mm reference distance, the LK-F sensor covers a measuring range of ±200 mm, with repeatability of 400 μm over 200-400 mm and 800 μm over 400-600 mm. ## hot-metal-detector ### DK-SCZ-II Hot & Cold Metal Detector (Laser Distance Type) URL: https://www.daidisensor.com/products/hot-metal-detector/dk-scz-ii-hot-and-cold-metal-detector/ DK-SCZ-II active laser hot & cold metal detector: 1mm accuracy, 0.1-3/5/10/20m ranges, switching + 4-20mA + RS232 outputs, IP65 water/air-cooled housing. - The DK-SCZ-II is an active laser-based sensor, so it detects both cold and hot metal targets, unlike passive infrared hot metal detectors, which only respond to a target's own thermal radiation. - The DK-SCZ-II delivers 1 mm accuracy, 0.1 mm resolution, and 0.5 mm repeatability at a 10 Hz measuring rate. - The DK-SCZ-II is available in four selectable measuring ranges: 0.1-3 m, 5 m, 10 m, and 20 m. - The DK-SCZ-II provides three output interfaces on one unit: a programmable discrete switching output, a scalable 4-20 mA analog output, and an RS232 serial data interface (RS422 on request). ## press-brake-protection Category URL: https://www.daidisensor.com/products/press-brake-protection/ ### Press Brake vs Punch Press: Two Different Guarding Problems The question we hear most is why a press brake cannot simply take the same **press brake light curtain** that already guards the punch press next to it. The answer is in how the operator works. On a punch press or hydraulic press, the feed opening is fixed: nobody's hands belong inside it while the ram cycles, so a stationary curtain of infrared beams across that opening is exactly right. On a press brake, the operator is *part of the bending cycle* — they hold the sheet, follow it up as the material folds, and their fingers travel with the workpiece toward the tooling on every single part. Put a fixed curtain in front of a press brake and one of two things happens: it trips on every legitimate hand movement until someone bypasses it, or it gets mounted so far away that it protects nothing. Neither outcome survives an audit. The bending machine needs protection that moves with the punch instead of standing in front of the operator — which is what a ram-tracking laser system does. That single distinction sorts this whole category. Hand-fed bending: the [DKE-L3 laser protection system](/products/press-brake-protection/dke-l3-press-brake-laser-protection/). Fixed openings on power presses, shears and hydraulic presses: the DQS photoelectric guard with its dedicated controller. Machines with both a front and a rear opening: the DQV dual-zone system, one controller supervising two independent curtains. ### Which of the Three Systems Fits Your Machine? The three systems in this category do not compete with each other — each one exists for a machine geometry the other two handle badly. The table compares the published figures side by side. Attribute | DKE-L3 (press brake) | DQS (press / hydraulic) | DQV (dual zone) Guarding principle | 3-beam laser band that travels with the ram | fixed curtain + dedicated controller | two independent curtains, one controller Response time | 5 ms | ≤ 10 ms | ≤ 10 ms Resolution | 10 mm | 7 pitches: 10 / 14 / 20 / 25 / 30 / 40 / 80 mm | 10 / 20 / 40 / 80 mm per side Coverage | spans up to 15 m between brackets | protective height 50–2480 mm (4–32 beams) | up to 72 beams / 5680 mm combined Safety output | dual OSSD + FA fast-approach enable | relay contacts AC250V / 5A from the controller | dual relay or dual transistor Supply | 12–24 VDC | sensors DC 12/24 V; controller AC 110–220 V | controller AC 110–220 V Ingress protection | IP65 | IP65 | IP65 ### Press Brake Laser Protection: How Ram-Tracking Guarding Works The DKE-L3 mounts a transmitter and receiver on brackets bolted to the ram. Three parallel laser beams — E1, E2 and E3 — form a flat protective band directly beneath the punch, with E1 sitting just 3 mm below the tip. Because the brackets ride on the ram, that band keeps its 3 mm relationship to the punch through the entire stroke: the protection is always exactly where the pinch point is about to be, and nowhere else. Beam height is 4.5 mm, adjustable inside a 15 mm window, so the band can be tuned to the tooling actually installed. The **press brake safety laser** logic includes an FA (fast-approach) enable: while the field below the punch is clear, the ram is allowed to close at high speed; the moment any beam is interrupted during the approach, the dual OSSD outputs drop and the ram stops within the system's 5 ms response plus the machine's own stopping time. Class-1 infrared operation around 780 nm means no special eyewear anywhere in the cell. Alignment across long beds is the practical worry, and it is why the system spans up to 15 m with bracket geometry designed for repeatable re-mounting after tool changes. ### Guarding Power Presses and Hydraulic Presses with the DQS System For fixed openings, the DQS pairs a Type-4-architecture curtain with its own controller, which is what makes it a complete **hydraulic press guarding** package rather than a bare sensor: the controller's force-guided relay contacts (AC250V / 5A) wire straight into the press control circuit, and selected controller versions add EDM monitoring of the machine contactors. The controller family covers both retrofit and OEM builds. DQSW and DQSS are stand-alone boxes for adding protection to presses already on the floor; DQSN and DQSP are panel-mount versions for building into new machine cabinets. Output configuration is ordered by code — OC (1 NO + 1 NC), 2C (two NC) or 2O (two NO) — and detection distance is coded from class A (0.3–3 m) up to class H (0.3–40 m), so one series covers a bench press and a forty-meter transfer line alike. Resolution and protective height come from the pitch-and-beam-count matrix below: seven pitches from 10 to 80 mm, four to thirty-two beams, protective heights from 50 mm to 2480 mm. ### The Mounting Distance Comes From Your Machine's Stopping Time No guarding system on this page has a fixed "correct" mounting distance, because the minimum distance is a property of *your machine*, not of the sensor: it grows with the total time the press takes to actually stop after the output drops. A press with a tired brake needs the curtain further out than an identical press with a fresh one. That is why every serious **press brake safety** installation starts with a measured stopping time, and why we ask for that number in the inquiry rather than publishing a one-size answer. The practical sequence is short: measure the stopping time at the working stroke, add the guard's response (5 ms for DKE-L3, ≤ 10 ms for DQS/DQV), and derive the distance from the approach-speed formula in the machine-safety standards. Our [factory news article on press and press brake guarding](/news/press-brake-punch-press-light-curtain-guarding/) walks through a real installation with the arithmetic laid out. For pin-level output wiring — OSSD polarity, relay loop details, reset circuits — the DAIDISIKE engineering library on [fsddsk.com](https://www.fsddsk.com/safety-light-barrier-wiring-diagram) maintains the full diagram set for every output type we ship. ### What We Publish — and What to Ask the Factory For Every number above comes from the published series data, and the model tables on the three product pages list the ordering codes in full. Two things we deliberately do not print here: performance-level certificates (PL / functional-safety documentation is supplied per order, with the paperwork matched to the exact configuration shipped) and stopping-time-dependent mounting distances, which are meaningless without your measurement. If a spec you need is missing from a product page, that is a data gap we flag honestly rather than a number we invent — ask, and the factory answers with documents. ### Category FAQ Q: Can I use a standard safety light curtain on a press brake? A: Usually not. The operator must hold the sheet and follow it toward the tooling on every part, so a fixed curtain across the front either trips constantly or is mounted too far away to protect anything. Hand-fed press brakes take the ram-tracking DKE-L3 laser system; fixed-opening presses and shears take the [DQS or DQV curtain systems](/products/press-brake-protection/). Q: What is the difference between a press brake laser guard and a press light curtain? A: The laser guard travels with the ram — three beams, the first one 3 mm under the punch tip, 5 ms response, 10 mm resolution. A press light curtain covers a fixed opening — pitches from 10 to 80 mm, protective heights to 2480 mm, and a dedicated controller whose relay contacts wire into the press circuit. Q: Do these systems include the safety relay? A: DQS and DQV ship with their controller, so the safety-rated switching is built in. DKE-L3 outputs dual OSSD signals and is evaluated by a safety relay module — the [DA31 or DQSRN](/products/safety-relay/) are the matching parts from our own catalogue. Q: How do I choose between DQSW, DQSS, DQSN and DQSP controllers? A: W and S versions are stand-alone boxes for retrofitting presses already in service; N and P versions are panel-mount for OEM cabinets. Output codes: OC = 1 NO + 1 NC, 2C = two NC, 2O = two NO contacts. Q: What should I send to get an accurate quote? A: Machine type (press brake, punch press, shear or hydraulic press), bed length or opening width × height, the resolution class you need, and the measured stopping time. The stopping time decides the mounting distance and often the model — it is the one number no catalogue can supply for you. ### DKE-L3 Press Brake Laser Protection URL: https://www.daidisensor.com/products/press-brake-protection/dke-l3-press-brake-laser-protection/ DKE-L3 press brake laser guarding system: 3 beams (E1/E2/E3), 5ms response, 10mm resolution, 15m range, dual OSSD outputs, FA fast approach, IP65, 12-24VDC. - DKE-L3 uses three laser beams (E1/E2/E3) mounted beside the ram, with beam E1 set 3 mm below the punch tip, to guard the point of operation as the ram descends. - The system's dedicated FA (fast approach enable) output on receiver pin 7 permits high-speed ram closing while the protective field is clear. - DKE-L3 provides dual OSSD safety outputs (OSSD1 on pin 9, OSSD2 on pin 8) for interfacing with a press brake's CNC or hydraulic safety circuit. - Response time is 5 ms with 10 mm resolution. ### DQS Press Photoelectric Safety Guard URL: https://www.daidisensor.com/products/press-brake-protection/dqs-press-photoelectric-safety-guard/ DQS Type 4 press photoelectric safety guard: dual relay controller output, ≤10ms response, 4-32 beams, 10-80mm pitch, 50-2480mm protective height, IP65. - DQS is a Type 4 photoelectric safety light curtain system for point-of-operation guarding on power presses, combining a light curtain with a dedicated safety controller that outputs dual relay dry contacts. - DQS has a response time of ≤10 ms. - DQS is available in seven beam-pitch options — 10, 14, 20, 25, 30, 40, and 80 mm — with 4 to 32 beams, giving protective heights from 50 mm to 2480 mm. - DQS controllers are available in external stand-alone form (DQSW, DQSS) for retrofit installations and built-in panel-mount form (DQSN, DQSP) for OEM integration. ### DQV Double-sided Photoelectric Safety Protection Device URL: https://www.daidisensor.com/products/press-brake-protection/dqv-double-sided-photoelectric-safety-protection-device/ DQV double-sided photoelectric safety device runs two independent light-curtain sets, up to 72 beams, 5680mm height, IP65, dual relay output, ≤10ms response. - The DQV double-sided photoelectric safety protection device runs two independent light-curtain sets from a single controller, each with its own output circuit. - DQV supports beam pitch options of 10, 20, 40, and 80 mm, selectable independently per protected side. - At 80 mm pitch, a single DQV light-curtain side can reach up to 72 beams and a 5680 mm protective height. - The DQV controller outputs dual relay dry contacts or dual transistor signals per side, with a response time of ≤10 ms. ## lidar ### DLD-100D Single-Line TOF Scanning LiDAR URL: https://www.daidisensor.com/products/lidar/dld-100d-single-line-tof-scanning-lidar/ DLD-100D single-line TOF scanning LiDAR: up to 100 m range, 905 nm Class 1 laser, 280°/360° scan angle, IP67 housing, Ethernet output for AGV and robot use. - The DLD-100D single-line TOF LiDAR detects targets up to 100 m away at 90% reflectivity and 40 m away at 10% reflectivity, with a ranging accuracy of ±20 mm (±10 mm within 0.1-15 m). - DLD-100D uses a 905 nm Class 1 laser source, drawing a maximum of 3 W from a 9-36 V DC supply. - The DLD-100DC variant scans a full 360°, while DLD-100DH and DLD-100DP scan 280°; DLD-100DH and DLD-100DC support selectable 0.08°/0.16°/0.32° angular resolution at 50/25 Hz, while DLD-100DP runs at a fixed 100 Hz with 0.32° resolution. - DLD-100D is rated IP67, measures 60 x 60 x 80 mm, weighs 250 g excluding cable, and outputs data over a standard Ethernet 100BASE-TX interface. ### DLD-50D 2D TOF LiDAR for Navigation & Mapping (50 m) URL: https://www.daidisensor.com/products/lidar/dld-50d-2d-tof-lidar-for-navigation-and-mapping/ DLD-50D 2D TOF LiDAR: 50 m range (90% remission), ±20 mm repeatability, 280° FoV, IP67, 250 g, 2.5 W, Ethernet output for AGV/AMR navigation & mapping. - The DLD-50D 2D TOF LiDAR delivers ±20 mm repeatability across a 280° field of view, with an 80° blind sector at 320°–0°–40°. - The DLD-50D is rated for a 50 m detection range at 90% target remission, and a guaranteed 20 m at 10% remission. - The DLD-50DH model offers selectable 0.08°/0.16°/0.32° angular resolution at 50 Hz; the DLD-50DP model runs 0.32° resolution at 100 Hz. - The DLD-50D operates on a 225 kHz ranging sample rate and withstands ambient light above 100,000 lux. ### DLD-50G 2D Single-line LiDAR (Diffuse-remission Measuring Type) URL: https://www.daidisensor.com/products/lidar/dld-50g-2d-single-line-lidar/ DLD-50G is a 2D single-line laser scanning lidar built for diffuse-remission measurement on natural surfaces, no reflector or cooperative target required. - The DLD-50G is classified in DAIDISIKE's catalog as a 2D single-line laser scanning lidar of the diffuse-remission measuring type. - As a diffuse-remission measuring device, the DLD-50G is designed to read distance from the natural surface reflectivity of the target, without requiring an installed reflector or cooperative target. - The DLD-50G performs a single-line 2D scan, producing a distance profile across a cross-section on each rotation rather than a single fixed-point reading. ### DLD05A3 2D TOF Obstacle-avoidance LiDAR (5 m) URL: https://www.daidisensor.com/products/lidar/dld05a3-2d-tof-obstacle-avoidance-lidar/ DLD05A3 2D TOF Obstacle-avoidance LiDAR: 0.05-5 m range, 270° field, 3 NPN/PNP switching outputs, 16 zone sets, IP65, 50×50×76 mm, no protocol stack. - Outputs 3 discrete switching signals (NPN or PNP) plus 1 status signal, with no fieldbus or point-cloud output. - Detection range is 0.05–5 m across a 270° scanning angle, with ±30 mm detection accuracy. - Angular resolution is selectable at 0.1° or 0.3°, with scan frequencies of 15 Hz or 30 Hz. - Stores 16 zone sets, each defining 3 detection zones mapped to the sensor's 3 switching outputs. ### DLD20A5-5N / DLD20A5-5P 2D TOF Obstacle-avoidance LiDAR (20 m) URL: https://www.daidisensor.com/products/lidar/dld20a5-5n-dld20a5-5p-2d-tof-obstacle-avoidance-lidar/ DLD20A5-5N/-5P 2D TOF LiDAR: 0.05-20 m range, 270° scan, 3x NPN/PNP discrete outputs, 16 zone sets, ±30 mm accuracy, IP65, DC9-28V. No bus, no SDK, no code. - The DLD20A5 2D TOF LiDAR detects objects from 0.05 m to 20 m and outputs three NPN or PNP discrete switch signals plus one status signal, with no Ethernet or bus protocol involved. - The DLD20A5 scans a 270° field at a selectable 15 Hz or 30 Hz rate, with 0.1° or 0.3° selectable angular resolution and ±30 mm detection accuracy. - The DLD20A5 uses a 905 nm, Class 1 laser source and carries an IP65 ingress protection rating, operating on a DC9-28V supply. - The DLD20A5 stores 16 zone sets, each providing three nested detection fields mapped to its three discrete outputs, enabling staged warning/slow-down/stop responses. ### DLD30T-5N Single-line TOF Measuring 2D LiDAR (30 m) URL: https://www.daidisensor.com/products/lidar/dld30t-5n-single-line-tof-measuring-2d-lidar/ DLD30T-5N single-line TOF 2D LiDAR: 30 m/90% reflectivity range, 0.08° angular resolution, 270° scan, 100BASE-TX Ethernet point-cloud output, IP67, 148 g. - The DLD30T-5N single-line TOF LiDAR detects up to 30 m on 90% reflectivity targets and 10 m on 10% reflectivity targets. - The DLD30T-5N has an adjustable angular resolution down to 0.08°, across a 270° scan angle. - The DLD30T-5N outputs point-cloud measurement data over a 100BASE-TX Ethernet interface. - The DLD30T-5N scan frequency is adjustable from 10 Hz to 30 Hz. ### DLD50T8N / DLD50T8P — 50 m Measuring LiDAR with Discrete I/O + Ethernet URL: https://www.daidisensor.com/products/lidar/dld50t8n-dld50t8p-50-m-measuring-lidar-with-discrete-i-o-ethernet/ DLD50T8N/DLD50T8P 50 m TOF measuring lidar: 280 degree scan, +/-30 mm accuracy, NPN/PNP discrete I/O plus 100BASE-TX Ethernet output, IP67, 9-36 V DC supply. - The DLD50T8N/P is a 2D single-line TOF lidar rated for 50 m detection at 90% target remission and 20 m at 10% remission, with ±30 mm accuracy. - DLD50T8N provides NPN discrete output at 50 Hz scan frequency with selectable 0.08°/0.16°/0.32° angular resolution; DLD50T8P provides PNP discrete output at 100 Hz scan frequency with 0.32° angular resolution. - Both variants scan a 280° field of view and output data over 100BASE-TX Ethernet in addition to their discrete NPN/PNP output. - The sensor operates on 9-36 V DC, is IP67 rated, uses a Class 1 laser, and measures 60×60×80 mm at 250 g. ### DLDS2030A-5S Laser Scanning Radar URL: https://www.daidisensor.com/products/lidar/dlds2030a-5s-laser-scanning-radar/ DLDS2030A-5S laser scanning radar from DAIDISIKE: a 2D LiDAR-type sensor with its own catalogue page and a dedicated 6-piece accessory line, DLDS-1 to DLDS-6. - DLDS2030A-5S is a laser scanning radar model in DAIDISIKE's laser radar product line, given a dedicated page in the factory catalogue alongside the DLD-05D and DLD-20D series. - A dedicated factory accessory line, DLDS-1 to DLDS-6, is available for the DLDS2030A-5S scanner. - As of the current documentation review, the DLDS2030A-5S does not appear on either of DAIDISIKE's two prior company websites. ### SDLD-05A TOF Laser Radar (Obstacle-Avoidance Type) URL: https://www.daidisensor.com/products/lidar/sdld-05a-tof-laser-radar/ SDLD-05A TOF laser radar: 270° scan, 0.1-14m range, ±30mm accuracy, 16 switchable zone groups, Ethernet UDP + NPN I/O for AGV/RGV obstacle avoidance. - The SDLD-05A TOF laser radar scans a 270° field of view with a detection range of 0.1-14m at 90% target reflectivity (0.1-8m at 10% reflectivity) and ±30mm measurement accuracy. - Detection zones are organized as 16 switchable zone groups, each with 3 independently editable sub-zones in polygon (up to 15 vertices), fan, or rectangular shapes. - Zone group selection is controlled by a 4-bit digital input code (IN1-IN4), addressing 16 pre-configured zone groups (0-15) without reprogramming the sensor. - The unit combines an Ethernet (RJ45, UDP) interface with NPN digital I/O (up to 4 inputs, 4 outputs) and a USB Type-C configuration port. ### ST27 Series Safety Laser Scanner (Type 3 ESPE, 3 m / 5 m Protective · 20 m Warning · 60 m Measuring) URL: https://www.daidisensor.com/products/lidar/st27-safety-laser-scanner/ ST27 safety laser scanner: Type 3 ESPE (IEC 61496), SIL 2, Cat. 3 / PL d, 276° scan, 3 m or 5 m protective field, 100 ms response, IP65, PNP OSSD. Six models. - The ST27 series is rated Type 3 to IEC 61496-1, SIL 2 to IEC 61508, and Category 3 / Performance Level d to ISO 13849, as an AOPDDR-type electro-sensitive protective equipment under IEC 61496-3. - ST27 scans 276° at 30 Hz with 0.1° angular resolution, using a 905 nm Class 1 laser source to IEC 60825-1:2014. - The protective field is 3 m on ST27-03S / 03D / 03P and 5 m on ST27-05S / 05D / 05P, specified at 1.8% remission — the worst case, representing deep black clothing. - The ST27 warning field reaches 10 m (03x models) or 20 m (05x models) at 10% remission, and the measuring range reaches 40 m (03x) or 60 m (05x) at 70% remission. Neither is a safety function. ## measuring-light-curtain Category URL: https://www.daidisensor.com/products/measuring-light-curtain/ ### Measuring, Not Guarding — What These Light Curtains Are For A **measuring light curtain** looks exactly like its safety cousin — two aluminium profiles, a fence of infrared beams between them — but it answers a completely different question. A safety curtain asks *"is something in the opening?"* and stops a machine. A measuring curtain asks *"how tall, how wide, where, and how many?"* and reports the answer to your PLC as data. The DQL, DQM and DQLV series on this page carry no IEC 61496 Type rating and no ISO 13849 category, deliberately: they are measurement and detection instruments, and we say so plainly rather than dressing them in safety language. That makes this the right page if you searched for a **non safety light curtain**, a **light grid sensor**, or an infrared curtain for dimensioning, profiling, counting, hole detection or vehicle separation. If your application must protect people — stopping a press when a hand enters — leave this page now and specify from the [safety light curtain category](/products/safety-light-curtain/) instead; no measuring product belongs in a personnel-protection circuit. ### DQL vs DQM vs DQLV: Choose by Output, Not by Looks All three series share the same optical platform; what you are really ordering is an output philosophy. If your controller wants an analogue level or a serial telegram, that is the DQL. If you want plain switching outputs with no controller in between, that is the DQM. If the job is separating vehicles in a lane, the DQLV is a purpose-built variant with its own logic. Attribute | DQL | DQM | DQLV (vehicle) Output | 4–20 mA current, voltage output, or RS-485/232 | NPN or PNP switching, direct | vehicle-separation logic outputs Protocol | Modbus RTU (customised frames) | — | — Finest beam pitch | 1.25 mm | 2.5 mm | fixed 1 mm-resolution grid Max beams / height | 496 beams / 3990 mm | per model table | up to 1420 mm Response | per configuration | catalogue lists differing values — confirm at order | ≤ 15 ms Special ability | push frames every 100 ms or polled multi-drop | no controller needed at all | ignores anything under 150 mm by design Environment | IP65 (IP68 as DQLF) | IP65 (IP68 as DQMF) | IP67 + optional heater hood ### Resolution Is Set by Beam Pitch: 1.25 mm to 80 mm Detection resolution on a light grid is not a tuning parameter — it *is* the beam pitch you purchase. An object is registered when it fully interrupts at least one beam, so the pitch defines the smallest object the curtain can guarantee to see. The DQL's finest grade runs a 1.25 mm pitch (64 to 448 beams, with the special constraint that this grade works across 0.2–1 m ranges), resolving wire-thin edges; the DQM starts at 2.5 mm; and the ladder climbs through 5, 10, 20 and 40 mm up to 80 mm for pallet-scale profiling. Protected heights follow the same matrix — from about 60 mm up to 3990 mm depending on pitch and beam count — so the practical selection sequence is: smallest object first (that fixes the pitch), measured span second (that fixes beam count and height), output philosophy last (that picks the series). We publish the pitch, beam count and height for every model on the three product pages; what we do not publish is any extra "precision factor" beyond the pitch, because optically there isn't one. ### Analog 4–20 mA and Modbus RTU Integration On the serial side, the DQL speaks Modbus RTU with two frame styles. Mode 1 transmits the complete beam bitmap — every beam's clear/blocked state, every cycle — which is the format for profiling and hole-detection work where the *shape* matters. Mode 2 compresses each scan to three numbers: highest blocked beam, lowest blocked beam, and total blocked count — one compact frame that yields object height, vertical position and a presence count, which covers most dimensioning and sorting jobs at a fraction of the bus load. Delivery is either active push (the curtain transmits on its own clock, 100 ms by default) or passive polling, which lets several curtains share one RS-485 trunk and answer by address. Baud rates run 4800 to 38400. On the analogue side, 4–20 mA current output is the standard configuration; for voltage output the catalogue currently prints more than one range on different pages (1–10 V, 0–10 V and 1–5 V appear), so treat the voltage option as configure-at-order and have the factory confirm the range in writing — we would rather flag our own catalogue's inconsistency than let it surprise you at commissioning. If the receiving end is one of our own I/O modules rather than a PLC, the [relay & timer module category](/products/relay-module/) includes RS-485 I/O units that pair naturally with the DQL on the same bus. Bus wiring, termination and sensor-output reference material beyond this page lives in the DAIDISIKE engineering library on [fsddsk.com](https://www.fsddsk.com/installation-wiring) — this page stays at the integration level. ### Vehicle Separation Lanes: Ignoring Everything Under 150 mm Is the Feature The DQLV inverts the usual instinct that more sensitivity is better. In a toll, weigh-in-motion or access lane, the failure mode is *over*-detection: a bird crossing the grid, spray off a wheel, a dangling mudflap — any of them can split one vehicle into two transactions. So the DQLV is built to disregard objects under 150 mm outright while resolving the vehicle profile on a 1 mm grid, fast enough (≤ 15 ms) to catch the gap between a tractor and its trailer at lane speed and judge axle spacing and headway correctly. The environmental spec follows the duty: IP67 housings, sensor operation from -10 to +55 °C, and for climates where lens icing or fog is the real enemy, the DQLV-1.6 and DQLVF-1.8 heater hoods (200 W, 24 VDC) keep the optical faces clear through winter. For counting, classing and separation duty the grid replaces buried loops without cutting the roadway. ### When a Measuring Curtain Is the Wrong Device Three honest disqualifiers. If the point of the installation is protecting a person, this category is disqualified by definition — specify from the [safety light curtain range](/products/safety-light-curtain/) with its published Type-4 architecture instead. If your smallest object is finer than the finest pitch you can accommodate, a light grid is the wrong physics — look at the [laser displacement sensors](/products/laser-displacement-sensor/) for sub-millimetre work. And if the line gets high-pressure washdown, the standard IP65 housings are not the answer: the DQLF/DQMF IP68 variants exist as special orders, but describe the washdown regime to the factory before ordering rather than after the first CIP cycle. ### Category FAQ Q: Is a measuring light curtain a safety device? A: No. The DQL, DQM and DQLV publish no IEC 61496 Type rating and no ISO 13849 category, and must never be the device that stops a machine to protect a person. For personnel protection, specify from the [safety light curtain category](/products/safety-light-curtain/) — same optical idea, completely different engineering duty. Q: What is the difference between DQL and DQM? A: Output only, on a shared platform. DQL carries the analogue (4–20 mA / voltage) and RS-485/232 Modbus RTU options and reaches a 1.25 mm pitch; DQM outputs NPN or PNP switching signals directly with no controller in the loop, starting at a 2.5 mm pitch. Q: What data can I read over RS-485? A: Two frame formats: the full beam-state bitmap (Mode 1), or highest blocked beam + lowest blocked beam + blocked count (Mode 2). Frames arrive by active push — every 100 ms by default — or by passive polling, which allows several curtains on one bus, addressed individually. Baud 4800–38400. Q: What is the finest resolution available? A: 1.25 mm beam pitch on the DQL fine grade — 64 to 448 beams, protected heights 78.75 to 558.75 mm, with ranges limited to 0.2–1 m at this pitch. The DQM's finest is 2.5 mm. In every case detection resolution equals the pitch ordered. Q: Can the DQLV replace a buried loop for vehicle detection? A: For separation, counting, classing and headway judgement in a lane — yes, without cutting the road surface. The 150 mm detection floor means birds, spray and debris cannot trigger it, and the optional 200 W / 24 VDC heater hoods keep it running through icing weather. ### DQL Measuring Light Curtain (Analog/RS485) URL: https://www.daidisensor.com/products/measuring-light-curtain/dql-measuring-light-curtain/ DQL Measuring Light Curtain: analog voltage/4-20mA plus RS-485/RS-232 Modbus RTU output, 1.25-80mm beam spacing, up to 496 beams, heights to 3990mm. - DQL's analog output is 4-20 mA current, or a voltage output that the catalog labels inconsistently — 1-10 V in the model-code key, 0-10 V in the general spec-table header, and 1-5 V in the wiring diagram — so the exact voltage range should be confirmed with the factory before ordering. - DQL also offers RS-485/RS-232 serial communication on a customized Modbus RTU protocol: 4800/9600(default)/19200/38400 bps, 8 data bits, no parity, 1 stop bit, 16-bit CRC. - Two serial frame modes are selectable: Mode 1 uploads the full beam-status bitmap to the host; Mode 2 uploads only the highest blocked point, lowest blocked point, and total blocked-beam count. - Transmission is selectable as active (auto-push, default every 100 ms, interval adjustable) or passive (host polls; multiple curtains can share the bus, each with its own address code). ### DQLV Vehicle Separation Light Curtain URL: https://www.daidisensor.com/products/measuring-light-curtain/dqlv-vehicle-separation-light-curtain/ DQLV vehicle-separation light curtain: 150 mm minimum detectable object, 20/40/80 mm spacing, 4-72 beams, IP67, controller-free NPN/PNP/relay/RS-485 output. - The DQLV vehicle-separation light curtain detects objects 150 mm and larger only, by design, so birds, insects, and glare do not trigger a false vehicle-present signal, per the DAIDISIKE catalog. - DQLV beam spacing comes in 20, 40, or 80 mm, with beam counts from 4 to 72 (20 mm pitch, up to DQLV72/20-1420, a 1420 mm protected height), 4 to 36 (40 mm pitch, up to DQLV36/40-1400), or 4 to 18 (80 mm pitch, up to DQLV18/80-1360). - DQLV response time is 15 ms or less, and the catalog states it suppresses 99% of interference from electromagnetic sources, strobe lighting, welding arcs, and surrounding light sources. - In its dual-channel transistor output configuration, DQLV outputs two separate NPN or PNP signals: channel 1 reports vehicle detection, channel 2 reports a light-curtain fault alarm; wiring runs over a seven-core cable directly into the lane controller, with no external controller required. ### DQM Measuring Light Curtain (Switching Output) URL: https://www.daidisensor.com/products/measuring-light-curtain/dqm-measuring-light-curtain/ DQM Measuring Light Curtain (switching output): 6 beam-spacing options from 2.5-80mm, NPN/PNP output, direct 5-wire/7-wire connection, no external controller. - The DQM measuring light curtain switches its output on when any single beam across the full detection height is interrupted. - Switching output is selectable by order code: A = NPN normally-closed, B = PNP normally-closed, C = NPN normally-open, D = PNP normally-open. - The finest beam spacing offered in the DQM series is 2.5 mm, starting from model DQM32/2.5-77.5; DQM does not offer the 1.25 mm spacing available on the analog/RS-485 DQL series. - DQM is available in six beam-spacing options: 2.5, 5, 10, 20, 40, and 80 mm, with protection heights from 60 mm up to 3,990 mm across the published model list. ## safety-door-lock Category URL: https://www.daidisensor.com/products/safety-door-lock/ ### Choose a Safety Interlock Switch by Guard Function A **safety interlock switch** either monitors whether a machine guard is closed, or monitors and physically locks it. Use monitoring-only when opening the guard removes access before a hazard can remain; use a guard-locking switch when motion, pressure, heat or stored energy continues after the stop command and the door must stay closed until release is permitted. This category includes mechanical tongue switches, magnetic coded and RFID non-contact switches, solenoid guard locks, actuator keys and a mechanical safety-door bolt. The first decision is monitoring versus locking; the second is contact, magnetic or RFID actuation. ### Safety Door Switch and Guard Locking Range For mechanical position monitoring without locking, compare [DX-D2/DX-D3](/products/safety-door-lock/dx-d2-and-dx-d3-safety-door-switch/). For non-contact monitoring, [DX-C1](/products/safety-door-lock/dx-c1-magnetic-coded-safety-switch/) uses coded magnetic actuation and [DX-R1](/products/safety-door-lock/dx-r1-non-contact-safety-switch/) uses RFID coding with dual-channel transistor outputs. For mechanical-contact guard locking, compare DX-W2, DX-W3 and DX-W5 by contact arrangement and holding force. [DX-D6](/products/safety-door-lock/dx-d6-guard-locking-safety-door-switch/) combines RFID-coded actuation, guard locking, redundant dual NPN or PNP outputs and a compact 30 × 30 mm metal body. It is the model-owned page for a compact electronic guard locking safety switch. Need | Starting family | Published distinction mechanical door-position monitoring | DX-D2 / DX-D3 | NC/NO contacts, no locking function magnetic non-contact monitoring | DX-C1 | coded magnet, up to 17 mm published sensing distance RFID non-contact monitoring | DX-R1 | universal or uniquely coded, dual NPN/PNP output mechanical-contact guard locking | DX-W2 / W3 / W5 | solenoid lock options and 1300 N published holding force compact electronic guard locking | DX-D6 | RFID actuator, 2000 N, 30 × 30 mm body ### How the DX-D6 Guard Locking Sequence Works DX-D6 separates three facts that are often confused: the actuator is present at the switch, the locking mechanism is engaged, and the redundant output signals are available to the safety controller. The controller evaluates those signals; the switch does not directly remove power from the machine load. C-type is mechanical lock with solenoid release (power-to-release). D-type is solenoid lock with mechanical release (power-to-lock). The correct loss-of-power behaviour depends on whether the machine retains a hazard after power is removed, so that choice belongs to the risk assessment rather than a generic preference. ### Magnetic, RFID or Mechanical Safety Switch? Magnetic coded switches tolerate guard misalignment and have no tongue entering a head. RFID-coded switches add universal- or uniquely-coded actuator choices and are useful where defeat resistance and electronic outputs matter. Mechanical tongue switches remain practical where visible positive actuation, conventional contacts and familiar maintenance procedures lead the specification. No technology is automatically correct for every door. Record door type, alignment movement, need for locking, desired coding, output style, ingress requirement and the safety function's required performance before selecting a model. ### From Door Switch to Safety Relay A door switch supplies the guard state; a safety relay or safety controller evaluates the safety channels and controls downstream contactors. The [DA31 safety relay module](/products/safety-relay/da31-emergency-stop-safety-relay-module/) includes a selectable safety-door input mode and accepts dual-channel PNP or NPN signals. The [safety relay category](/products/safety-relay/) compares DA31 with DQSRN. For exact terminal wiring, validate the switch variant, relay input mode and complete machine safety circuit together. Category text is not a substitute for the model wiring document or the machine risk assessment. ### Category FAQ Q: What is the difference between a safety interlock switch and a guard locking switch? A: An interlock switch monitors whether the guard is closed. A guard locking switch also holds the door shut until release is permitted. Q: When does a machine safety door need guard locking? A: Use guard locking when a hazardous condition can remain after the stop command, such as coast-down, stored pressure, heat or residual motion, and the risk assessment requires access to be delayed. Q: What is a magnetic safety switch used for? A: A magnetic coded safety switch monitors a movable guard without mechanical contact and can tolerate more alignment variation than a tongue-operated switch. Q: What is the difference between universal and uniquely coded RFID actuators? A: A universal-coded switch accepts the matching actuator type; a uniquely coded version recognises its paired actuator, increasing resistance to simple substitution. Q: Does DX-D6 directly switch the machine motor? A: No. Its redundant transistor outputs are evaluated by a safety controller or safety relay; downstream safety contacts or contactors remove power from hazardous functions. Q: How do I choose power-to-release or power-to-lock? A: Choose from the risk assessment and the safe state on loss of power. Consider whether a hazard remains after power-off and whether emergency escape or process protection must be maintained. ### DX-C1 Magnetic Coded Safety Switch URL: https://www.daidisensor.com/products/safety-door-lock/dx-c1-magnetic-coded-safety-switch/ DX-C1 non-contact magnetic coded safety switch: up to 17 mm sensing range, 2NC/1NC1NO/2NO outputs, IP65, ISO 13849-1 PLe Cat.4 circuit design, 6 models. - DX-C1 is a non-contact coded-magnet safety switch with a sensing distance of up to 17 mm in both the Z and Y directions. - DX-C1 requires multiple magnetically sensitive elements to be triggered in a defined sequence before it will actuate, distinguishing it from a simple reed-type magnetic door sensor. - DX-C1 is offered in three contact output configurations: 2 NC, 1 NC + 1 NO, and 2 NO. - DX-C1 is CE marked and designed for use in safety circuits up to Performance Level e, Category 4 under ISO 13849-1. ### DX-D2 & DX-D3 Safety Door Switch URL: https://www.daidisensor.com/products/safety-door-lock/dx-d2-and-dx-d3-safety-door-switch/ DX-D2 & DX-D3 mechanical safety door switches: NC/NO contacts, IP67 resin head, 1,000,000 mechanical / 300,000 electrical life, per IEC/EN60947-5-1. - The DX-D2/DX-D3 safety door switch is a mechanical contact-type interlock switch (NC/NO contacts) with no locking function. - Four ordering codes cover the DX-D2/DX-D3 range: DX-D2-CO (1NC+1NO), DX-D2-2C (2NC), DX-D3-2CO (2NC+1NO), DX-D3-3C (3NC). - The switch head is rated IP67 and made of resin. - Rated mechanical life is 1,000,000 operations; rated electrical life is 300,000 operations. ### DX-D6 Guard Locking Safety-Door Switch URL: https://www.daidisensor.com/products/safety-door-lock/dx-d6-guard-locking-safety-door-switch/ DX-D6 guard locking safety-door switch: 2000 N holding force, redundant dual NPN/PNP outputs, RFID-coded actuators, 30x30 mm metal body, 32 model variants. - The DX-D6 guard locking safety-door switch combines mechanical/electromagnetic door locking with independent redundant monitoring outputs in a single device. - The DX-D6 is available in a mechanical-lock/solenoid-release (power-to-release) C-type and a solenoid-lock/mechanical-release (power-to-lock) D-type, to match different machine risk-assessment outcomes. - The DX-D6 provides a rated holding force of 2000 N. - The DX-D6's all-metal body has a 30 mm × 30 mm cross-section, sized for direct mounting on aluminum extrusion frames up to 30 mm. ### DX-D6 Guard Locking and Monitoring Sequence DX-D6 performs two related jobs: it holds the guard closed and reports redundant state signals to the safety controller. The RFID actuator identifies that the door has reached the switch; the locking mechanism secures it; the controller evaluates the switch outputs before permitting hazardous motion. On a stop request, the machine must reach the release condition before the lock is released. This is a functional overview, not a timing or terminal diagram. Release logic, controller evaluation and the complete stop circuit must be validated from the exact C/D, R/H, S/D, N/P and A/B model ordered. ### Power-to-Release vs Power-to-Lock DX-D6 DX-D6 lock code | Published mechanism | Loss-of-power behaviour to assess C type | mechanical lock / solenoid release | power is required to release the guard D type | solenoid lock / mechanical release | loss of power releases the electromagnetic lock The selection is a risk decision, not a convenience preference. If hazardous motion or stored energy remains after power loss, the guard may need to remain locked; if emergency release is the dominant requirement, the safe behaviour may differ. Compare the other [safety door switches and guard locks](/products/safety-door-lock/) before fixing the architecture. ### DX-K Series Safety Door Lock Operation Keys URL: https://www.daidisensor.com/products/safety-door-lock/dx-k-series-safety-door-lock-operation-keys/ DX-K series operation keys: 11 models (DX-K1-K8, no K7) for DX-W2/W3/W5/D2/D3 safety door locks, ±1mm insertion tolerance, fixed and adjustable geometries. - The DX-K operation key series comprises 11 models (DX-K1, DX-K1D, DX-K2, DX-K2D, DX-K3, DX-K3D, DX-K4, DX-K4D, DX-K5, DX-K6, DX-K8); there is no DX-K7 in this numbering. - DX-K keys are designed to fit the DX-W2, DX-W3, DX-W5, DX-D2, and DX-D3 safety door lock/switch bodies. - The specified key-to-slot insertion tolerance is ±1mm. - Preparation clearance before fitting is 1~3.5mm for the DX-W2/W3/W5 switch family and 1~2.5mm for the DX-D2/D3 switch family. ### DX-R1 Non-contact Safety Switch (RFID Coded) URL: https://www.daidisensor.com/products/safety-door-lock/dx-r1-non-contact-safety-switch/ DX-R1 non-contact RFID-coded safety switch: dual-channel 150mA PLe, Type 4 (ISO 14119) output, 0-10mm switch-on, 60ms response, 8 NPN/PNP models, cascadable. - The DX-R1 non-contact safety switch has an assured horizontal switch-on distance of 0-10mm and an assured switch-off distance greater than 25mm. - Vertically, the DX-R1's assured switch-on distance is 0-6mm and assured switch-off distance is greater than 15mm. - The DX-R1 provides dual-channel solid-state (transistor) safety outputs rated 150mA, plus a separate 50mA auxiliary/diagnostic output. - The DX-R1 is available in 8 complete-set (P1) models, spanning 4-wire (F-type) and 6-wire cascade (E-type) wiring, NPN and PNP output, and universal (S) or unique (D) coding per ISO 14119. ### DX-W2 Safety Door Lock (Solenoid Guard Locking Interlock Switch) URL: https://www.daidisensor.com/products/safety-door-lock/dx-w2-safety-door-lock/ DX-W2 safety door lock: 1300 N holding force, 4 contact blocks in 14 NC/NO configurations (28 models), IP67, 24VDC solenoid, 1,000,000 mechanical cycles. - The DX-W2 safety door lock provides a rated holding force of 1300 N. - The DX-W2 solenoid operates on 24 V DC ±10%, consuming approximately 200 mA (4.8 W). - The DX-W2 is rated IP67 and offers a mechanical life of 1,000,000 operations with an electrical life of 150,000 operations. - The DX-W2 offers 14 NC/NO contact configurations across two independent contact compartments, available in two locking-release types (GD, GC), for 28 catalog models. ### DX-W3 Safety Door Lock URL: https://www.daidisensor.com/products/safety-door-lock/dx-w3-safety-door-lock/ DX-W3 safety door lock: 1300 N holding force, 2 gold-plated contact blocks in 6 NC/NO configurations, DC24V IP67, 1,000,000-cycle life, 12 model variants. - The DX-W3 safety door lock provides 1300 N of locking/holding force. - The DX-W3 is available in 12 models: 6 NC/NO contact combinations, each offered in GD and GC locking-type versions. - The DX-W3 uses 2 gold-plated contact blocks and is rated for 1,000,000 mechanical operating cycles. - The DX-W3 solenoid operates on DC24V ±10% and the switch is rated IP67. ### DX-W5 Safety Door Lock (Guard Locking Interlock Switch) URL: https://www.daidisensor.com/products/safety-door-lock/dx-w5-safety-door-lock/ DX-W5 safety door lock: 6 gold-plated contact blocks, 4 NC/NO configurations, GD/GC locking, 1300 N holding force, IP67, over 150,000 operations life. - The DX-W5 safety door lock provides six gold-plated silver-alloy contact blocks across four NC/NO configurations (2CO/2CO, 3C/2CO, 2CO/3C, 3C/3C). - DX-W5 holding force is rated at 1300 N. - DX-W5 is offered in eight order codes: four contact configurations, each available in GD (solenoid-locked, mechanically released) and GC (mechanically-locked, solenoid-released) versions, with a metal (J) head. - DX-W5 solenoid operating voltage is 24 V DC or 10-115 V AC/DC; indicator light voltage is 10-115 V AC/DC. ### DXL Safety Door Bolt (DXL-A / DXL-B) URL: https://www.daidisensor.com/products/safety-door-lock/dxl-safety-door-bolt/ DXL safety door bolt: purely mechanical, 48mm bolt travel, 1,000,000-cycle life, 1-10mm door gap tolerance, pre-drilled for DX-W2/W3/D2/D3 interlock switches. - The DXL safety door bolt has no electrical output of its own; it is a purely mechanical bolt with mounting provisions for a separate interlock switch. - DXL's base mounting pattern is designed to accept DAIDISIKE's DX-W2, DX-W3, DX-D2, and DX-D3 interlock switches directly. - DXL accommodates door gaps from 1 to 10 mm. - DXL has a bolt travel of 48 mm and a rated mechanical life of 1,000,000 operations. ## fiber-optic-sensor ### Fiber Amplifier (Digital Fiber Optic Sensor Amplifier) URL: https://www.daidisensor.com/products/fiber-optic-sensor/fiber-amplifier/ DAIDISIKE fiber amplifier series: digital fiber optic sensor amplifiers with NPN/PNP output, 4-step 25/50/200/400µs response time, and 35mm DIN-rail mounting. - The WAN/WAP dual-display fiber amplifier shows the preset threshold in green and the current received light intensity (0–9999) in red on two separate 8-digit rows. - The WAN/WAP model offers four selectable response-time steps: 25 µs, 50 µs, 200 µs, and 400 µs. - The WDN single-display fiber amplifier provides three power modes — FINE (200 µs), TURBO (400 µs), and SUPER (0.8 ms) — with a maximum system detection distance of 0–4000 mm. - The DA4-DAIDI Chinese-menu fiber amplifier has a documented response time of 16–25 µs. ### Fiber Optic Sensor Heads (Fiber Units) URL: https://www.daidisensor.com/products/fiber-optic-sensor/fiber-optic-sensor-heads/ Fiber optic sensor heads: passive through-beam, diffuse reflective, coaxial and array types, M3/M4/M6 sizes, four sleeve lengths, 1 m cable standard. - The fiber optic sensing head is a passive optical component; it contains no electronics, which are instead located in the separate fiber amplifier. - Standard through-beam (T), diffuse reflective (KS) and coaxial (RC) fiber head series share a common 310/410/610 (M3/M4/M6) sizing system with four optional sleeve lengths per size: 10, 20, 40 and 90 mm. - Right-angle (90 degree) head versions are available across the through-beam, diffuse reflective and coaxial series for low-profile, flush mounting. - Array (matrix) fiber units are available in through-beam (DK-KT series) and diffuse reflective (DK-KF series) configurations, each projecting light across a detection band rather than a single point. ### Matrix (Array) Fiber Optic Heads URL: https://www.daidisensor.com/products/fiber-optic-sensor/matrix-fiber-optic-heads/ Matrix (array) fiber optic heads cover a detection zone with multiple light points. DK-KT through-beam and DK-KF diffuse reflective series, 18 models. - 2 configurations: DK-KT through-beam series and DK-KF diffuse reflective series - 18 models in total: 9 per series, with 8 numeric-suffix sizes (10/15/20/25/30/35/50/120) plus one U10 model each - Compatible fiber amplifier platform rated for a system detection range of up to 4,000 mm, depending on fiber unit and power mode - Zero electronics at the sensing point - the head is a fully passive optical component ## safety-edge ### JB-PSE Series Pressure-Sensitive Safety Edge URL: https://www.daidisensor.com/products/safety-edge/jb-pse-series-pressure-sensitive-safety-edge/ JB-PSE pressure-sensitive safety edge: 13 ms response, PFH 6.99x10-10/h, Category 3, MTTFd >30 years, 7 profiles for AGV, door and machine protection. - The JB-PSE series pressure-sensitive safety edge has a response time of 13 ms and an actuating travel of less than 2 mm on the JB-PSE-108 and JB-PSE-110 profiles. - JB-PSE-360 provides overtravel of up to less than 45 mm, giving the connected machine additional braking distance after the stop signal is issued. - The JB-PSE series catalog lists a PFH of 6.99×10⁻¹⁰ per hour (referenced against IEC 61508, SIL 3), Category 3 per EN ISO 13849-1, MTTFd greater than 30 years, and B10d of 3×10⁷ when used with a DQRSN-SR(A) safety controller. - The JB-PSE series is available in seven cross-section profiles (108, 110, 215, 230, 245, 345, 360) mounted on 15 mm, 25 mm, or 35 mm aluminum rails. ### JB Series Safety Edge (Economy Line) URL: https://www.daidisensor.com/products/safety-edge/jb-series-safety-edge/ JB Series Safety Edge (Economy Line): 37 rubber cross-section profiles, 5-90 mm high, actuating force <=30 N, IP65, -20C to +80C, custom lengths 20-300 cm. - The JB series offers 37 rubber cross-section profiles ranging from 5 mm to 90 mm in height. - Catalog-listed JB safety edge models have an actuating force of 30 N or less and an actuating travel of 2 to 8 mm. - Up to 5 JB safety edges can be daisy-chained to a single controller input. - The 2-wire monitored version of the JB safety edge uses an 8.2 kΩ, 0.25 W terminating resistor for line supervision. ## contact-displacement-sensor ### JNS-Q Contact Displacement Grating Sensor URL: https://www.daidisensor.com/products/contact-displacement-sensor/jns-q-contact-displacement-grating-sensor/ JNS-Q contact displacement grating sensor: 0.2-5 micron resolution, 12.7/25.4mm range, RS485 Modbus RTU up to 255 units, IP65, O1/O2 GO/NG alarm outputs. - The JNS-Q contact displacement sensor uses an optical grating measuring principle with moire-fringe interpolation, achieving resolution from 0.2 μm (high-precision) to 5 μm (basic), with approximately 1 μm repeatability. - The JNS-Q is available in two standard measuring ranges: 12.7 mm (JNS-Q120 series) and 25.4 mm (JNS-Q250 series). - 24V-type JNS-Q sensors support RS232/RS485 with native Modbus RTU at 38,400 bps and can be multi-dropped up to 255 units on a single bus. - The JNS-Q provides two built-in I/O limit-alarm outputs (O1/O2) for hardware-level GO/NG tolerance judgment without host communication. ## safety-mat ### JT14 Safety Mat (Economical) URL: https://www.daidisensor.com/products/safety-mat/jt14-safety-mat/ JT14 economical safety mat: ≥30 kg actuating force, ≤30 ms response, IP65 rating, 1,000,000-operation life, volt-free N.O. output, 6 sizes plus custom shapes. - The JT14 safety mat has an actuating force of ≥30 kg for an adult. - The JT14 safety mat has a response time of ≤30 ms. - The JT14 safety mat carries an IP65 protection rating. - The JT14 safety mat features an NBR rubber surface with aluminum trim edging and a mechanical life of 1,000,000 operations.