M12 Inductive Proximity Sensors (22mm/35mm/45mm Short-Body)

Name: M12 Inductive Proximity Sensors (22mm/35mm/45mm Short-Body)
Brand: DAIDISIKE
SKU: m12-inductive-proximity-sensors
Availability: InStock

M12x1 inductive proximity sensors in 22/35/45mm bodies, flush or non-flush, NPN/PNP NO/NC, IP67-rated.

M12 Inductive Proximity Sensors (22mm/35mm/45mm Short-Body) - dimensional drawing

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Technical Specifications

Sensing Method	Inductive
Thread	M12x1
Body Length	22mm / 35mm / 45mm
Product Dimensions	M12x1x22mm / M12x1x28mm (22mm body); M12x1x35mm; M12x1x45mm
Sensing Distance Sn	2mm, 4mm (22mm/35mm body); 2mm, 4mm, 6mm flush and 4mm, 8mm, 10mm non-flush (45mm body)
Mounting Type	Flush; T suffix = non-flush
Output	NPN / PNP, Normally Open (NO) / Normally Closed (NC)
Wiring	3-wire DC
Detection Target	Metal
Indicator	Built-in LED
Operating Voltage	10-30VDC
No-Load Current	<10mA
Maximum Load Current	150mA
Leakage Current	<0.01mA
Voltage Drop	<1.5V
Ripple	<10%
Switching Hysteresis	<15% (Sr)
Repeatability	<3.0% (Sr) / <5.0% (Sr)
Temperature Drift	<10% (Sr)
Response Time	0.1ms to 1ms, depending on body length/sensing distance variant (fastest: 22mm flush 2mm = 0.1ms)
Switching Frequency	100Hz to 1.5KHz, depending on body length/sensing distance variant (fastest: 22mm flush 2mm = 1.5KHz)
Protection Rating	IP67
Operating Temperature	-25C to +70C
Short-Circuit Protection	Yes
Overload Current Protection Point	180mA
Housing Material	Nickel-plated brass
Cable Length	2m (longer lengths available on special request)

Overview

This is a three-wire DC inductive proximity sensor with an M12x1 threaded metal housing, designed to detect the presence of metal targets without contact. It is offered in a short 22mm super-short body, a 35mm body, and a 45mm body, each available in flush (shielded, "P" suffix) or non-flush (unshielded, "T" suffix) mounting styles, suiting machine builders, panel integrators, and maintenance engineers who need a compact, standard M12 footprint sensor for limit, position, or presence detection in space-constrained installations.

The series covers sensing distances from 2mm to 6mm on flush-mount variants and 4mm to 10mm on non-flush variants, running on a 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, and the IP67-rated nickel-plated brass housing includes built-in short-circuit protection plus a 180mA overload current protection point.

Features & Benefits

Three Body Lengths, Including a True 22mm Super-Short Version

One family covers 22mm super-short, 35mm, and 45mm body lengths on the same M12x1 thread. Integrators can fit the sensor into shallow brackets or crowded fixtures where a standard 45mm-long M12 sensor won't physically fit, without switching to a different thread size.

Flush and Non-Flush Mounting in the Same Thread

Flush (P) versions can be mounted embedded in metal with the sensing face level with the surrounding surface for protection from side impact. Non-flush (T) versions give a longer sensing distance when embedded metal on the sides isn't a concern.

Sensing Distance Built Into the Model Code

Sensing distance is encoded directly into the part number - M1202 = 2mm, M1204 = 4mm, M1206 = 6mm flush; M1204T/M1208T/M1210T = 4/8/10mm non-flush. Customers order by catalog code rather than custom-specifying.

NPN/PNP and NO/NC as Standard Catalog Variants

Every sensing distance/length/mount combination is available in both NPN and PNP transistor output, and both normally-open (1) and normally-closed (2) logic, so it matches either sinking or sourcing PLC input cards without a special order.

IP67-Rated Housing for Washdown and Outdoor-Adjacent Environments

The nickel-plated brass housing carries an IP67 ingress protection rating, letting it tolerate splashes, coolant spray, and dust in typical factory-floor conditions.

Built-In Short-Circuit and Overload Protection

The sensor includes short-circuit protection and an overload current protection point of 180mA, reducing the risk of sensor burn-out from wiring mistakes or downstream faults during commissioning.

Fast Response for High-Speed Part Counting

Response time is as fast as 0.1ms with switching frequency up to 1.5KHz on the 22mm flush version, suitable for detecting fast-moving parts on conveyors or indexing mechanisms.

Wide Operating Temperature Range

Rated for -25C to +70C operation, covering most indoor industrial environments including unheated warehouses in cooler climates.

Applications

Workpiece Presence Detection on Assembly/Conveyor Lines — Detecting metal workpieces is the core use case for inductive proximity sensors; the 22-45mm length options match different station installation depths.

Rotary Indexing Table Position Detection — Switching frequency up to 1.5KHz and response time as fast as 0.1ms suit high-speed position confirmation on rotary stations.

Beverage/Can Filling Line Metal Can Detection — Metal cans are an ideal inductive detection target, and the IP67 rating tolerates the moisture and washdown common on filling lines.

Pallet/Fixture Positioning on Conveyor Tracks — Confirms whether a pallet or fixture has reached a designated station; the non-flush version offers a longer sensing distance for more flexible mounting.

Machine Guard Door Open/Closed Status Detection — Detects the metal structure on a guard door to provide position feedback ahead of a safety interlock (position detection only, not a safety-rated function).

Space-Constrained Bracket Mounting on Compact Machinery — The 22mm super-short body is designed for shallow brackets and narrow mechanisms where a standard 45mm-long sensor won't fit.

Metal Object Counting on High-Speed Production Lines — A 0.1ms response time and switching frequency up to 1.5KHz support accurate counting of fast-moving parts.

Embedded (Flush) Mounting in Metal Frames/Brackets — Flush (P) versions mount with the sensing face level with surrounding metal, reducing protrusion and impact risk in embedded installation positions.

Non-Flush Mounting Where Longer Sensing Range Is Needed — Non-flush (T) versions don't require metal-free clearance around the sensing face and achieve a longer sensing distance than flush versions - up to 10mm on the 45mm body.

Models & Ordering Information

22mm Body

M1202N1P22M1202P1P22M1202N2P22M1202P2P22M1204N1P22M1204P1P22M1204N2P22M1204P2P22M1204N1T22M1204P1T22M1204N2T22M1204P2T22

M12x1x22mm super-short body (28mm depth option available); flush 2mm/4mm and non-flush 4mm sensing distance; NPN/PNP, NO/NC.

35mm Body

M1202N1P35M1202P1P35M1202N2P35M1202P2P35M1204N1P35M1204P1P35M1204N2P35M1204P2P35M1204N1T35M1204P1T35M1204N2T35M1204P2T35

M12x1x35mm body; flush 2mm/4mm and non-flush 4mm sensing distance; NPN/PNP, NO/NC.

45mm Body

M1202N1PM1202P1PM1202N2PM1202P2PM1204N1PM1204P1PM1204N2PM1204P2PM1206N1PM1206P1PM1206N2PM1206P2PM1204N1TM1204P1TM1204N2TM1204P2TM1208N1TM1208P1TM1208N2TM1208P2TM1210N1TM1210P1TM1210N2TM1210P2T

M12x1x45mm body; flush 2mm/4mm/6mm and non-flush 4mm/8mm/10mm sensing distance; NPN/PNP, NO/NC.

How to Select

If installation depth is limited, choose the 22mm super-short body; for standard installations choose 35mm or 45mm - the longer the body, the more sensing-distance options are available (the 45mm body adds a 6mm flush step and 8mm/10mm non-flush steps).
If the sensor will be surrounded by metal or needs embedded mounting, choose flush (P, flush mount); if there's no surrounding metal interference and a longer sensing distance is wanted, choose non-flush (T, model number contains "T").
The digits in the model number (02/04/06/08/10) indicate the sensing-distance step - 2/4/6mm for the flush series and 4/8/10mm for the non-flush series; pick the model matching the actual target-to-sensor installation gap and leave a safety margin rather than mounting at the detection limit.
Choose N (NPN) if the PLC input card is sinking-type wiring, or P (PNP) if it's sourcing-type wiring; the two electrical logics are different and cannot be mixed on the same wiring.
The last digit of the model number is 1 for normally open (NO, output conducts when metal is detected) or 2 for normally closed (NC, output breaks when metal is detected) - choose based on PLC program logic or interlock requirements.
The series is uniformly M12x1 threaded; the 22mm body also offers a 28mm installation-depth option - confirm the equipment's mounting-hole size and installation depth match before ordering.

📘 Need the full method? How to Choose a Proximity Sensor · NPN vs PNP Sensor Outputs Explained

When NOT to specify the M12 — and what to use instead

Detecting plastic, wood, liquid, or other non-metallic parts

Why not: The FAQ for this series states explicitly that as an inductive proximity sensor it is designed to detect metallic targets only.

Use instead: A capacitive proximity sensor series, which can detect non-metallic and liquid targets.

Application needs more than 10mm sensing distance

Why not: The maximum sensing distance in this family is 10mm, on the 45mm body in non-flush mounting.

Use instead: The economy M18/M30 series or the JM-series M18/M30 connector sensors, rated up to 40mm sensing distance.

Need more than 4mm non-flush sensing distance on the 22mm or 35mm body

Why not: Non-flush (T) sensing distance on the 22mm and 35mm bodies is limited to 4mm; the extra 8mm/10mm non-flush steps are only available on the 45mm body.

Use instead: The 45mm body in this same M12x1 thread size if a longer non-flush sensing distance is required.

High-speed line needing faster than 1.5KHz switching

Why not: The fastest switching frequency in this series is 1.5KHz, on the 22mm flush 2mm variant; frequency falls to 100Hz on the longest-range variants.

Use instead: The 22mm flush/2mm variant for top switching speed, or a photoelectric sensor if higher line speed is required.

Sensing an aluminum, brass, or copper target at the full rated distance

Why not: The rated Sn values (2mm-10mm) are standard inductive ratings with no non-ferrous correction factor documented in the spec sheet.

Use instead: Apply a reduction factor for non-ferrous targets (confirm the exact factor with the factory) or select the next-larger body/sensing-distance step for margin.

Machine-guard door interlocking or any personnel-safety function

Why not: The FAQ for this series notes that guard-door use is position detection only, not a safety-rated function, and no safety certification is listed.

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
Exact IP67 test conditions and duration
Reverse-polarity or overvoltage protection beyond the stated overload trip point
Weld-field (weld-immune) suitability
Certification documents (stated as available on request, not published)

Frequently Asked Questions

What is the difference between flush (P) and non-flush (T) mounting on this M12 sensor?

Flush (shielded) sensors, marked with a "P" length suffix in this catalog, have a sensing face that can be mounted level with surrounding metal and are protected against side interference, but have a shorter rated sensing distance. Non-flush (unshielded) sensors, marked with a "T" suffix, need metal-free clearance around the sensing face but achieve a longer sensing distance - for example the 45mm body offers 8mm and 10mm non-flush distances versus a maximum 6mm flush distance.

What sensing distances are available in this M12 series?

Flush-mount versions are available in 2mm, 4mm, and (45mm body only) 6mm sensing distance. Non-flush versions are available in 4mm (22mm/35mm body) and 4mm/8mm/10mm (45mm body). The distance is encoded in the model number (e.g. M1202 = 2mm, M1204 = 4mm, M1206 = 6mm, M1208 = 8mm, M1210 = 10mm).

What is the operating voltage and output current rating?

The sensor operates on 10-30VDC, three-wire DC wiring, with a maximum load current of 150mA and a no-load current below 10mA.

Does this sensor include overload/short-circuit protection?

Yes. It has built-in short-circuit protection and an overload current protection point rated at 180mA.

What ingress protection (IP) rating does this sensor have?

IP67, suitable for splash and coolant-spray environments typical of factory floors.

What is the cable length, and can it be extended?

Standard cable length is 2 meters; longer lengths can be produced on special request.

What housing material is used?

Nickel-plated brass (copper) housing.

What is the sensor's response time and maximum switching frequency?

Response time ranges from 0.1ms to 1ms and switching frequency ranges from 100Hz to 1.5KHz, depending on the specific body length and sensing distance variant - the fastest combination (22mm flush, 2mm sensing distance) reaches 0.1ms response / 1.5KHz switching frequency.

Can this sensor detect non-metal objects?

No. As an inductive proximity sensor, it is designed to detect metallic targets only; it does not detect plastic, wood, liquid, or other non-metal materials.

What is the difference between NPN and PNP output, and how do I choose?

NPN output sinks current (connects the load to the negative/0V rail when active) and is matched to PLC input cards wired for sinking inputs; PNP output sources current (connects the load to the positive supply rail when active) and matches sourcing-type PLC inputs. Choose based on your PLC's input card wiring convention - the two are not interchangeable without rewiring.

Can this sensor be mounted with the 22mm body at a 28mm installation depth?

Yes, the 22mm body is offered with a 28mm installation-depth dimension option in addition to the 22mm dimension; confirm the exact mounting depth needed against your bracket before ordering.

Are certification documents available for this series?

Certification documents are available on request.

Works Well Together

On the same machine or line, M12 is typically ordered together with: Photoelectric Sensors · Relay & Timer Modules · Laser Switch Sensors

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