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Photoelectric Sensors

Photoelectric sensors detect the distance, absence or presence of an object. These sensors are great for sensing long distances and detecting most materials.

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  • baumer-fhck-07n6901__28112.jpg

    Baumer

    FHCK 07N6901/KS35A

    Subminiature Diffuse Sensor with Background Suppression (BGS), Pulsed Red LED, Teach-In, 10-30VDC, 60mm Range, NPN, Light/Dark Operate, 100mA, 8 x 16.2 x 10.8 (WHD), Flylead Connector M8 4-Pin 200mm Length, Ambient Temperature: -20 to +50°C, IP65

  • baumer_fhdk04_870x630_2__95585.jpg

    Baumer

    FHDK 04G6102

    Subminiature Diffuse Sensor with Background Suppression (BGS), Pulsed Point Source LED, 50mm Tw Range, 11-30VDC, Light Operate, Push-Pull, 50mA, 2m 3-Pin Cable, 44.8 x 4 x 6.2mm (HWD), Plastic (ASA) Housing, PMMA Front (Optics), -10 to +50°C, IP65

  • baumer_fhdk04_870x630__67284.jpg

    Baumer

    FHDK 04G6111

    Subminiature Diffuse Sensor, Background Suppression (BGS), Pulsed Point Source LED, 30mm ±2mm Range Tw, 11-30VDC, Dark Operate, Push-Pull, <50mA, 2m 3-Pin Cable, 44.8 x 4 x 6.2mm (HWD), Plastic (ASA) Housing, PMMA Optics, -10 to 50°C, IP65

  • baumer_-_fhdk_04g61_-_diffuse_sensor__71139.jpg

    Baumer

    FHDK 04G6111/KS35A

    Subminiature Diffuse Sensor with Background Suppression (BGS), Pulsed Point Source LED, 30mm Tw Range, 11-30VDC, Dark Operate Push-Pull, 50mA, 200mm Flylead Connector M8 4-Pin, 44.8 x 4 x 6.2mm (HWD), ASA Housing, PMMA Optics, -10 to +50C, IP65

  • baumer_-_fhdk_04g61_-_diffuse_sensor_1__23502.jpg

    Baumer

    FHDK 04G6112

    Subminiature Diffuse Sensor with Background Suppression (BGS), Pulsed Point Source LED, 50mm Tw Range, 11-30VDC, Dark Operate, Push-Pull, <50mA, 2m 3-Pin Cable, 44.8 x 4 x 6.2mm (HWD), Plastic (ASA) Housing, PMMA Front (Optics), -10 to +50°C, IP65

  • baumer_-_fhdk_04g61_-_diffuse_sensor_2__98656.jpg

    Baumer

    FHDK 04G6112/KS35A

    Subminiature Diffuse Sensor with Background Suppression (BGS), Pulsed Point Source LED, 50mm Tw Range, 11-30VDC, Dark Operate, Push-Pull, <50mA, 200mm Flylead Connector M8 4-Pin, 44.8 x 4 x 6.2mm (HWD), ASA Housing, PMMA Optics, -10 to +50°C, IP65

  • baumer_fhdk07_870x630_3__39832.jpg

    Baumer

    FHDK 07N6901

    Subminiature Diffuse Sensor, Background Suppression (BGS), Pulsed Red LED, 10-60mm Tw Sensing Dist., 10-30VDC, Light/Dark Operate, NPN, <100mA, 2m Cable Bottom Side, 16.2 x 8 x 10.8mm (HWD), Plastic Housing, PMMA Optics, -20 to +50°C, IP65

  • baumer_fhdk07_870x630_2__61970.jpg

    Baumer

    FHDK 07N6901/KS35A

    Subminiature Diffuse Sensor, Background Suppression, Pulsed Red LED, 10-60mm Range Tw, 10-30VDC, Light/Dark Operate, NPN, <100mA, Flylead Connector M8 4-Pin 200mm Length, 16.2 x 8 x 10.8mm (HWD), Plastic Housing, PMMA Optics, -20 to +50°C,

  • baumer_-_fhdk_10g512_-_diffuse_sensor_-_cable__39645.jpg

    Baumer

    FHDK 10G5120

    Miniature Diffuse Sensor, Background Suppression (BGS), Pulsed Red LED, 30mm ±2mm Range Tw, 10-30VDC, Light/Dark Operate, Push-Pull, <50mA, 2m 4-Pin Cable, 27 x 10.4 x 14.7mm (HWD), Plastic (ASA) Housing, PMMA Optics, -25 to +65°C, IP65

Photoelectric sensors detect the distance, absence or presence of an object. These sensors are great for sensing long distances and detecting most materials.

How Does a Photoelectric Sensor Work?

Generally a photoelectric sensor consists of the following:

  • Transmitter - emits the light beam
  • Receiver - detects the light beam and converts it to an electrical signal

Photoelectric sensors detect changes in the light beam caused by the presence/absence, movement or properties of an object.

Types of Photoelectric Sensors:

  • Through-Beam (Thru-Beam)
    • Transmitter and receiver are two separate units that are directly opposite of each other. The sensor detects when an objects breaks the light beam
    • Great for long distance detection
    • Ideal for conveyors, counting or monitoring door openings
  • Retroreflective (Reflective Mode)
    • Transmitter and receiver are in one housing; light beam is reflected back by a reflector. Detection is triggered when an object breaks the beam.
    • Medium range detection and easier to install than a through beam
    • Ideal for package detection and pallet positioning
  • Diffuse (Proximity Mode)
    • The transmitter and receiver in one housing; the sensor detects light reflected directly off the target object (no reflector needed)
    • Best for short range applications
    • Ideal for detecting objects on assembly lines, verifying presence or checking fill level
  • Specialized Types:

Categories Related to Photoelectric Sensors:

  • Stack lights - signal towers visually communicate the data or alerts that the photoelectric sensors are generating
  • Smart relays - photoelectric sensors provide input signals which can process the data and control outputs
  • Pushbuttons and estops - if your sensor detects a fault, an operator can use a pushbutton to reset the system
  • HMIs - HMIs can dispay the data from the photoelectric sensor which allows you to monitor processes