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    Proximity Sensor, Capacitive, M18, NPN

    5 out of 5 based on 2 reviews | Write a review
    M18 proximity sensor can detect nonmetal (or metal), plastic, water, liquid level and powder height, with small size, long life, cheap price, unshielded type installation, anti-interference ability, 10mm detection distance, manufacturer direct sale.
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    Capacitive proximity sensor with M18*1 thread, NPN type output, manufacturer direct sale.


    • Red LED checks the state of proximity sensor

    • High repeated positioning accuracy

    • High switching frequency

    • Wide voltage range

    • Antivibration, dust, water and oil prevention

    • Reverse power protection, short circuit protection, directly connecting with PLC


    Model ATO-PSC-18ABZ
    Installation type Unshielded Shielded
    All the output methods DC type NPN NO NO
    NC NC
    NC NC
    AC type 2 wire NO NO
    NC NC
    Detection range 10mm±10% 5mm±10%
    Setting distance 0-8mm 0-4mm
    Delay distance ≤10% detection range
    Detection object Any dielectric substance
    Standard detection object SPCC iron 50*50*1mm
    Response frequency DC: 0.5kHz, AC: 25Hz
    Supply voltage DC type: DC 12-24V (6-36V), impulse (p-p) 10% below; AC type: AC 110-220V (90-250V) 50/60Hz
    Withstand voltage AC1000V 50/60Hz 1min between charging part and housing
    Voltage influence Inside ±15% rated supply voltage range, at rated supply voltage value, inside ±10% detection distance
    Consumption current N/P type: ≤13mA, D type: ≤0.8mA, A type: ≤1.7mA
    Control output N/P type: ≤300mA, D type: ≤200mA, A type: ≤400mA
    Loop protection N/P/D type: reversal connection protection, surge absorption, load short-circuit protection, A type: surge absorption
    Ambient temperature & humidity Operation temperature/storage temperature: -30~65℃ (no freeze, no dew); Operation humidity/storage humidity: 35~95%RH
    Temperature influence Temperature range -30~65℃, at +23℃, ±15% detection distance; Temperature range -25~60℃, at +23℃, ±10% detection distance
    Insulation impedance ≥50MΩ (DC500 megameter) between charging part and housing
    Material Housing: Nickel plated brass, Detection surface: ABS
    Protection class IP67
    Cable length 1.2m

    Dimensional drawing (unit: mm):
    Proximity sensor capacitive M18 dimensional drawing
    Wiring diagram:
    Proximity sensor NPN wiring

    Tips: Types of proximity sensor

    1. According to the working principle, proximity sensors can be divided into:
      Inductive type: Used to detect a variety of metals
      Capacitance type: Used to detect a variety of conductive or non-conductive liquid or solid
      Photoelectric type: Used to detect all lightproof materials
      Ultrasonic type: Used to detect the material that ultrasonic wave cannot pass through
      Electro-magnetic induction type: Used detect magnetic or non-magnetic metal
    2. According to design and shape, they can be divided into cylindrical type, square type, and ditch type, perforating type and separated type.
      Cylindrical type is more convenient in the installation than square one with same detection features. The testing part of ditch-type is inside the groove for detecting objects that pass through the groove. Perforating type is used for small parts of small screws or balls, and assembles with buoys into a water level detection device.
    3. According to power supply method, they can be divided into DC type and AC type.
    4. According to the output form, they can be divided into DC two-wire type, DC three-wire type, DC four-wire type, AC two-wire type and AC three-wire type.
    Existing reviews of Proximity Sensor, Capacitive, M18, NPN
    Do you have any suggestions to make it work?
    I am attempting to sense when a tennis ball goes between the two photoelectric sensors. The sensors are about 8 inches apart. The sensors are being powered by 12VDC, the output cable goes to a voltage divider (which reduces the voltage from 12V to about 2.5 V) and then to an Arduino. Based on my calculations, the ball is between the sensors for about 7 ms, which is more than the 1 ms reaction time for the sensors. The sensors pick up slower moving objects. Would increasing the voltage make them more sensitive? Would a different material (other than a tennis ball) work better? Could I have accidently damaged the sensors, which reduced the reaction time? Do you have any suggestions to make it work?
    From: Guyenng | Date: 03/08/2023
    Was this review helpful? Yes No (0/0)
    ATO Responded
    The voltage range of this photoelectric sensor is 6-36V, usually 12V or 24V. You can try increasing the voltage and see if you can detect it. If you still can't detect it, it means the tennis ball is moving too fast. The sensor is not affected by the detection of objects of different materials. If the object is black, it will be affected, because black will absorb light.
    Good product, good price
    This sensor works perfectly on my 3D printer. Tied right into 6 volt supply. It works as it should and very consistent. It gave very accurate readings every time. Good product!
    From: Leo | Date: 30/03/2022
    Was this review helpful? Yes No (0/0)
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