Economy Inductive Proximity Sensors M8/M12/M18/M30 (JNX/JNS Series)
Economy 3-wire DC inductive proximity sensors M8/M12/M18/M30 - flush/non-flush, NPN/PNP, NO/NC, IP67.
🔍 Click to enlarge · 1/6Technical Specifications
| Sensing Type | Inductive |
|---|---|
| Type | Full-thread (long-thread), economy series |
| Body Sizes | M8 / M12 / M18 / M30 |
| Output | NPN / PNP, Normally Open (NO) / Normally Closed (NC) |
| Mounting Type | Flush (P suffix) / Non-flush (no suffix) |
| Sensing Distance | M8: 1mm (flush) / 2mm (non-flush); M12: 2mm (flush) / 4mm (non-flush); M18: 5mm (flush) / 8mm (non-flush); M30: 10mm (flush) / 15mm (non-flush) |
| Wiring | 3-wire DC |
| Operating Voltage | 10-30VDC |
| Response Time | 0.1ms (M8/M12/M18); 0.5ms (M30 flush); 1ms (M30 non-flush) |
| Switching Frequency | 1KHz (M8/M12/M18); 500Hz (M30 flush); 300Hz (M30 non-flush) |
| Protection Rating | IP67 |
| Operating Temperature | -25°C to +70°C |
| Overload Protection | 180mA overload current protection point, built-in short-circuit protection |
| Cable Length | 1.5m standard, longer lengths available on request |
| Indicator | Built-in LED status indicator |
Overview
This is a 3-wire DC inductive proximity sensor series (JNX/JNS) built for detecting metal targets without physical contact. It is designed as a cost-effective, general-purpose option for machine builders, panel builders, and factory maintenance teams who need standard M8/M12/M18/M30 threaded proximity switches for position, presence, or count sensing on conveyors, indexing tables, and automated machinery, without paying for features they do not need.
The family covers four thread sizes - M8, M12, M18 and M30 - each available in flush and non-flush mounting with NPN or PNP output and normally-open (NO) or normally-closed (NC) switching, giving sensing distances from 1mm up to 15mm. M8, M12 and M18 sizes respond in 0.1ms at switching frequencies up to 1KHz, and every unit operates on 10-30VDC 3-wire DC wiring with an IP67-rated housing across a -25°C to +70°C operating range.
Features & Benefits
Full Range of Thread Sizes in One Family
M8, M12, M18 and M30 body sizes are covered within one product family. This lets you standardize on a single sensor line across most common machine-mounting hole sizes without switching brands or families.
Flush and Non-Flush Mounting in Every Size
Every size is offered as a flush (P-suffix) version that can be embedded in metal without false triggering, and as a non-flush version with a longer sensing distance for open mounting locations. This gives you a matched option for either installation environment.
NPN/PNP and NO/NC Output Combinations
Every size is available in NPN or PNP wiring with normally-open or normally-closed output. This matches the sensor directly to common PLC input card requirements without needing a separate interposing relay or converter.
Fast Response for Line-Speed Detection
M8, M12 and M18 sizes have a 0.1ms response time and switching frequency up to 1KHz. This supports high-speed part counting and position sensing on fast-moving conveyors and indexing equipment.
IP67-Rated Sealed Housing
The housing is rated IP67, protecting against dust ingress and temporary immersion. This suits washdown-adjacent or exposed factory-floor environments where dust and moisture are present.
Wide Operating Temperature Range
The sensors are rated for -25°C to +70°C operation. This covers unheated workshops as well as installations near heat-generating machinery within this range.
Built-In Short-Circuit and Overload Protection
Output is protected with a 180mA overload protection point and built-in short-circuit protection. This reduces the risk of sensor damage from wiring mistakes or load faults during installation and service.
LED Status Indication
Every unit has a built-in LED for on-site visual confirmation of the switching state. This speeds up installation checks and troubleshooting on the factory floor.
Applications
Models & Ordering Information
M8 Full-Thread (JNX series)
M8 Economy (JNS series)
M12 (JNS series)
M18 (JNS series)
M30 (JNS series)
How to Select
- Choose M8 for the smallest mounting footprint; sensing distance is 1mm (flush) or 2mm (non-flush).
- Choose M12 for 2mm (flush) or 4mm (non-flush) sensing distance.
- Choose M18 for 5mm (flush) or 8mm (non-flush) sensing distance.
- Choose M30 for the longest sensing distance in the family: 10mm (flush) or 15mm (non-flush).
- Within M8, choose the JNX full-thread version when the mounting position needs to be adjustable anywhere along the thread, or the JNS economy version for a standard fixed mounting section.
- Select flush (P-suffix) mounting when the sensor must be embedded in surrounding metal without false triggering.
- Select non-flush (no P-suffix) mounting when clear space around the sensing face is available and a longer sensing distance is preferred.
- Match NPN or PNP output to your PLC/controller's input card type (sinking or sourcing).
- Match NO (normally open) or NC (normally closed) output to your control logic.
- Confirm body length fits your mounting bracket before ordering.
- Confirm your control cabinet supplies 10-30VDC - this family is 3-wire DC only, not 2-wire DC or AC.
📘 Need the full method? How to Choose a Proximity Sensor · NPN vs PNP Sensor Outputs Explained
When NOT to specify the Economy — and what to use instead
Detecting plastic, wood, liquid, or other non-metallic parts
Why not: This is an inductive sensor family built to detect metal targets without contact; the spec sheet gives no rating for non-metallic targets.
Use instead: A capacitive proximity sensor series, which can detect non-metallic and liquid targets.
Sensing an aluminum, brass, or copper target at the full rated distance (e.g. 10mm on M30 flush)
Why not: The published sensing-distance values (M8 1/2mm ... M30 10/15mm) are a single rated figure with no non-ferrous correction factor listed.
Use instead: Apply a reduction factor for non-ferrous targets (confirm with factory) or size up to the next-largest thread (e.g. M18/M30) for margin.
High-speed counting beyond 1KHz (M8/M12/M18) or 500Hz (M30 flush)
Why not: Switching frequency is capped at 1KHz for M8/M12/M18 and drops to 500Hz (flush) / 300Hz (non-flush) on M30.
Use instead: A photoelectric sensor for higher-speed counting or position-sensing applications.
Panel wiring standardized on 2-wire DC or AC-powered proximity sensors
Why not: The wiring spec for this family is 3-wire DC only (10-30VDC); no 2-wire or AC variant is listed.
Use instead: Confirm 2-wire/AC availability directly with the factory before specifying, since this catalog line only lists 3-wire DC.
Need a full-thread, anywhere-along-the-body adjustable mount in M12/M18/M30
Why not: The full-thread (JNX) adjustable-position option is only listed for the M8 size in this catalog; M12/M18/M30 are listed only as the fixed-section JNS type.
Use instead: Confirm with the factory whether a full-thread version exists for M12/M18/M30, or use the standard JNS fixed-section body for those sizes.
Machine-guard interlocking or any personnel-safety function
Why not: The spec sheet for this family lists no functional-safety or safety-rated certification.
Use instead: A dedicated safety-rated interlock switch or safety light curtain for guarding duty.
Specifications we do not publish yet
We only publish a figure once we are confident it is true. The items below are still being validated through further testing and real-world customer feedback, so for now we would rather leave them open than guess. If one of them matters to your design, ask us for the latest validated status.
- Correction factor for non-ferrous (aluminum/brass/copper) targets versus the rated steel sensing distance
- MTBF / expected service life
- Housing material (not stated for this family, unlike other DAIDISIKE proximity lines)
- Reverse-polarity or overvoltage protection beyond the stated overload trip point
- Weld-field (weld-immune) suitability
- Exact cable/connector type and pinout
- Certification documents (stated as available on request, not published)
Frequently Asked Questions
What sensing distances are available in this economy inductive proximity sensor family?
What is the difference between flush and non-flush mounting?
What output configurations are available?
What is the operating voltage and wiring type?
What is the IP protection rating and operating temperature range?
What is the difference between the M8 full-thread (JNX) and M8 economy (JNS) versions?
Does the sensor include short-circuit protection?
What is the maximum switching frequency and response time?
What cable length is supplied, and can it be customized?
Are certification documents available for this series?
Works Well Together
On the same machine or line, Economy is typically ordered together with: Photoelectric Sensors · Relay & Timer Modules · Laser Switch Sensors
BGS-CX441 / BGS-CX442 Background Suppression Photoelectric Sensor
Wire-adjustable BGS sensor with 2 mm or 15 mm spot, 10-300 mm range, published black/white differential distance.
A1J0101 Economical Input Amplifier Module
Optocoupler-isolated input amplifier that turns a low-voltage signal into a 250V AC / 10A relay output.
DDSK Laser Diffuse Reflective Sensor M12 / DK Laser Diffuse Reflective Sensor M18
M12/M18 threaded laser diffuse reflective sensor with a visible 650nm red laser for fast alignment.
Related Products in Proximity Sensors
D6.5 Series Inductive Proximity Sensors (Ultra-Short 18mm / Y-Type / 35mm / 45mm)
6.5mm-diameter inductive proximity sensors for tight-clearance mounting where M8 sensors won't fit.
Economy M4/M5/M6 Inductive Proximity Switches (Export-Grade)
Compact export-grade M4/M5/M6 inductive proximity switches in NPN/PNP, NO/NC for tight-space detection.
High-Quality Threaded M4/M5/M6 Inductive Proximity Sensors
Threaded M4/M5/M6 inductive proximity sensors with selectable NPN/PNP output and NO/NC logic for tight spaces.
JD Series 3-Wire Connector-Type Inductive Proximity Sensors D6.5-M8 / D6.5-M12
6.5mm-probe inductive proximity sensor with a factory-fitted M8/M12 connector for tool-free field replacement.