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    Proximity Sensor, Inductive, 4 mm, NPN

    5 out of 5 based on 2 reviews | Write a review
    4mm proximity sensor can detect a variety of metals, miniature size, long life, low price, shielded type installation, anti-interference ability, 1mm detection distance, using for precise positioning of molds, precision machine tools and robots.
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    Delivery date: 6-12 days

    Inductive proximity sensor with 4 mm diameter, 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

    • Can replace small switches and limit switches


    Model ATO-PSI-4A1ZN
    Installation type Shielded
    All the output methods DC type NPN NO
    PNP NO
    2 wire NO
    Detection range 1mm±10%
    Setting distance 0-0.7mm
    Delay distance ≤10% detection range
    Detection object Magnetic metal (the detection distance decreases when it is non-magnetic metal)
    Standard detection object Iron 5*5*1mm
    Response frequency DC: 2kHz, AC: 50Hz
    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 inductive 4 mm dimensional drawing
    Wiring diagram:
    Proximity sensor NPN wiring

    Proximity sensor DC 2 wire wiring diagram

    Tips: How to choose a proximity sensor?
    Inductive proximity sensor and capacitive proximity sensor are often used in the general industrial sites. Because these two types of proximity sensors have lower standard on environment. If the detected object is a conductive object or an object fixed on metal, inductive proximity sensor will be generally chosen for its high response frequency, excellent anti-jamming performance, wide range of application and lower price. If the detected object is a non-metal (or metal), liquid height, powder height, plastic or tobacco etc, capacitive proximity sensor will be chosen for its low response frequency but good stability. On the occasion of better environment and non-dust pollution, photoelectric proximity sensor can be chosen because it almost has no effect on the detected object during operation. If the detected object is made from permeability magnetic material, or is buried of a magnet steel in order to distinguish the detected object from another object that moves together, Hall proximity sensor will be chosen due to its lowest price. Sometimes in order to improve the reliability of identification, the above-mentioned several proximity sensors are often used in combination.

    ATO will use a proximity sensor and a digital counter to count number in the video.

    Existing reviews of Proximity Sensor, Inductive, 4 mm, NPN
    As expected
    Easy to wire, diagram on the device, worked perfect on a PVC tube to detect cartridge brass and stop feeder.
    From: zhl | Date: 26/04/2022
    Was this review helpful? Yes No (0/0)
    Easy to carry
    I've had this sensor for six months. My colleague recommended this product to me. It is small and easy to carry and use at work. I will order more and recommend to my friends.
    From: Shaun | Date: 09/01/2023
    Was this review helpful? Yes No (0/0)
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