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M12 Inductive Proximity Sensor -- NPN Normally Open (N.O) Series 8 mm / 10 mm non-flush detection * 10-30 V DC * IP67 * 4-pin M12 connector
Built for Japanese PLCs and current-sinking input modules. When metal enters the detection range, the output pulls down to 0 V -- directly compatible with sink-type inputs on Mitsubishi, Omron and other Japanese PLCs without any level shifter.
Models on this page: IN8-M12NO68-M0A/D, IN8-M12NO50-M0A/D, IN10-M12NO68-M0A/D, IN10-M12NO50-M0A/D
Product Overview
What this series solves
On any production line there are three questions the operator keeps asking: is the part here, has the mechanism reached its end-stop, has the gripper closed? All three reduce to one detection: is a metal object in a specific position. An NPN normally-open proximity sensor gives a direct answer -- no metal = output open, metal present = output closed.
How NPN N.O works
NPN output is also called current sinking. Inside the sensor is an NPN transistor whose emitter is tied to 0 V (L−):
No metal target → transistor off → output pin is high-impedance → no current through the load → PLC input reads "0"
Metal enters the range → transistor on → output pin is pulled to ~0 V, current flows from L+ through the load into the output pin → PLC input reads "1"
The load is wired between L+ (brown, Pin 1) and OUT (black, Pin 4). Current flows into the output pin -- that is the sink behavior.
When to choose NPN N.O
Your situation
Choose it?
PLC input module is sink / common-plus (COM tied to 24 V+)
✅
You use Mitsubishi, Omron, Keyence or similar Japanese PLCs
✅
You want a logic that reads "target arrived = ON"
✅
PLC is source / common-minus
❌ pick PNP N.O
You need fail-safe -- broken wire must trigger an alarm
❌ pick NPN N.C
IN8 vs IN10 -- how to pick between the two distances
IN8 series -- 8 mm detection range, 500 Hz switching -- faster response, ideal for high-speed counting and small-part detection
IN10 series -- 10 mm detection range, 400 Hz switching -- more installation margin when the target vibrates or the mounting surface is uneven
Both share the M12 × 1 mm cylindrical thread and non-flush (unshielded) installation. Same datasheet, same mounting logic -- only the detection range and switching frequency differ.
Key Features
1. NPN current-sinking output, direct to Japanese PLCs Wire the output straight into the sink input of a Mitsubishi FX/Q, Omron CP/CJ, or Keyence module. No interposing relay, no level shifter. You save the cost of one relay and one wiring failure point.
2. Normally-open logic, easy to read on the floor No metal → LEDs off, output open. Metal present → 4 × LEDs light and output closes. During commissioning you don't need to check the manual -- just look at the LEDs.
3. Two detection ranges on one page Choose 8 mm at 500 Hz for high-speed applications, or 10 mm at 400 Hz when the target has more play.
4. Non-flush (unshielded) -- longer range from the same M12 footprint The unshielded structure lets the magnetic field spread sideways, giving a longer rated range than the flush variant in the same M12 body. The trade-off is that you must keep free metal space around the sensing face.
5. IP67 + −25…70 °C -- survives the shop floor IP67 per IEC 60529: dust-tight and protected against temporary immersion. Cutting fluid, coolant splash, and metal dust are all in spec. The −25…70 °C operating range covers cold storage to cabinet-side mounting.
6. Nickel-plated brass body + PBT sensing face The housing is nickel-plated brass for impact and corrosion resistance. The sensing face is blue PBT -- wear-resistant and insensitive to metal swarf. Two hex nuts (17 mm across flats) clamp the sensor and resist long-term vibration loosening.
7. Field-replaceable M12 connector The 4-pin M12 A-coded male connector (IEC 61076-2-101) is not a fixed cable. If the cable gets damaged, just swap the cordset -- no need to disassemble the sensor or re-wire it.
8. Triple electrical protection -- hard to kill during commissioning Built-in short-circuit, reverse-polarity and power-up pulse protection. If you accidentally reverse the 24 V supply or short the output to ground, the sensor protects itself and resumes operation once the fault is cleared.
Technical Specifications
Common electrical parameters (all 4 models)
Parameter
Specification
Standard
Output function
NPN, Normally Open (N.O)
IEC 60947-5-2
Output configuration
DC 3-wire
IEC 60947-5-2
Thread / form factor
M12 × 1 mm cylindrical
--
Installation type
Non-flush (unshielded)
IEC 60947-5-2
Operating voltage
10…30 V DC (±10%)
IEC 60947-5-2
Voltage drop
≤ 2.0 V
IEC 60947-5-2
Rated operating current
200 mA
IEC 60947-5-2
Leakage current
≤ 0.01 mA
IEC 60947-5-2
No-load current
≤ 10 mA (at 24 V DC)
IEC 60947-5-2
Switching hysteresis
< 15% of Sr
IEC 60947-5-2
Repeat accuracy
< 1.0% of Sr
IEC 60947-5-2
Electrical protection
Short-circuit / reverse-polarity / power-up pulse
IEC 60947-5-2
Switching-state indication
4 × LEDs, on while output is active
--
Connection
4-pin M12 connector, A-coded
IEC 61076-2-101
Per-model differences (key selection parameters)
Model
Sensing range Sn
Switching freq.
Body length
Thread length
Total length (straight)
90° height
IN8-M12NO68-M0A/D
8 mm (non-flush)
500 Hz
68 mm
42 mm
68 mm
34 mm
IN8-M12NO50-M0A/D
8 mm (non-flush)
500 Hz
50 mm
28 mm
50 mm
20 mm
IN10-M12NO68-M0A/D
10 mm (non-flush)
400 Hz
68 mm
42 mm
68 mm
34 mm
IN10-M12NO50-M0A/D
10 mm (non-flush)
400 Hz
50 mm
28 mm
50 mm
20 mm
Shared across all four: M12 × 1 mm thread, Ø7 mm sensing face, 67 mm barrel length (68-body) or 49 mm (50-body), 17 mm nut across flats.
Mechanical and environmental parameters
Parameter
Specification
Standard
Ambient operating temperature
−25 … +70 °C
IEC 60068-2-14
Ingress protection
IP67 (dust-tight, protected against temporary immersion)
IEC 60529
Housing material
Brass, nickel-plated
--
Sensing face material
PBT (polybutylene terephthalate)
--
Connector thread
M12 × 1 mm male
IEC 61076-2-101
Mounting hardware
Two hex nuts, 17 mm across flats
--
NPN N.O output truth table
Metal target
Output transistor
Output pin level
LEDs
PLC input
Not in range
Off (high-Z)
Pulled up to L+
Off
0
Enters range
On
≈ 0 V
Lit
1
Configuration Details
Model selection
Model
Range
Frequency
Body
Recommended use
IN8-M12NO68-M0A/D
8 mm
500 Hz
68 mm
High-speed counting, small-part detection, standard stations
IN8-M12NO50-M0A/D
8 mm
500 Hz
50 mm
Slim fixtures, tight machine frames
IN10-M12NO68-M0A/D
10 mm
400 Hz
68 mm
Targets that vibrate or have wide position tolerance
IN10-M12NO50-M0A/D
10 mm
400 Hz
50 mm
Limited space but 10 mm range required
Pin assignment -- 4-pin M12 A-coded
Pin
Wire colour (typical)
Signal
Description
1
Brown
L+
Supply positive, 10…30 V DC
2
White
N/C
Not connected (reserved)
3
Blue
L−
Supply 0 V (GND)
4
Black
OUT
NPN Normally Open (N.O) switching output
The factory datasheet does not include a wiring diagram. The table above follows the M12 4-pin A-coded convention (IEC 61076-2-101). Verify against the wiring label packed with the sensor before commissioning.
Wiring diagram -- NPN N.O
Key point: The load sits between L+ and OUT. When the sensor closes, it sinks the output pin to 0 V, completing the current path. This is the source-and-sink (sink) wiring.
Dimensions (mm)
Dimension
68 mm body
50 mm body
Total length (straight M12 connector)
68
50
Barrel length (to connector shoulder)
67
49
Threaded section length
42
28
Sensing face diameter
Ø7
Ø7
90° right-angle connector height
34
20
Mounting thread
M12 × 1 mm
M12 × 1 mm
Nut across flats
17
17
Mounting requirements (non-flush)
Free metal space around the sensing face. Non-flush (unshielded) sensors let the magnetic field expand sideways. Without sufficient clearance, the effective detection range collapses. Recommended free space ≥ 3 × Sn (≈ 24 mm for the 8 mm body, ≈ 30 mm for the 10 mm body). When mounting two sensors side by side, also keep enough spacing to prevent mutual interference.
If you must flush-mount. This series is unshielded. If the installation cannot provide side clearance, switch to a flush (shielded) variant instead.
Tightening torque. Clamp with the two hex nuts. Do not over-tighten -- suggested maximum is 15 N*m to avoid housing deformation.
Temperature drift. Datasheet repeat accuracy is < 1.0% Sr and hysteresis < 15% Sr. Allow margin for tight-positioning applications where temperature varies across the −25…70 °C range.
Typical applications
Industry
Use case
Industrial automation
Part-presence detection on conveyors, station confirmation on assembly lines
Packaging machinery
Carton and foil position verification, flap-in-place check
Material handling
Pallet, tote and shuttle positioning
Machine tools
End-stop detection, tool-changer position feedback
Output closed when no target -- for fail-safe circuits and wire-break detection
PNP Normally Open (N.O)
Current-sourcing output, fits other European PLCs
PNP Normally Closed (N.C)
Sourcing + fail-safe
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer
Year Established:
2021
Total Annual:
5000000-6000000
Employee Number:
80~120
Ecer Certification：
Verified Supplier
KRONZ is a manufacturing enterprise located in Zengcheng District, Guangzhou City. We focus on providing customers with high-efficiency industrial automation solutions and related industrial products. After many years of innovation and development, Kronz has complete product processing equi...
KRONZ is a manufacturing enterprise located in Zengcheng District, Guangzhou City. We focus on providing customers with high-efficiency industrial automation solutions and related industrial products. After many years of innovation and development, Kronz has complete product processing equi...
Floor 7, Building 12B, Hanhe Robot Intelligent Manufacturing Base Exhibition Center, Xiangshan Avenue, Zengcheng Economic Development Zone, Guangzhou, Guangdong Province, China
