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-fhdm_12n5001__33077.jpg

    Baumer

    FHDM 12N5001

    Diffuse Sensor With Background Suppression-Miniature, 15...300 mm Sensing Distance, Pulsed Red LED, NPN, Mechanical (5 Turn), 2 Meter Cable Length (4 Pin), 10...30VDC, IP67

  • baumer-fhdm_12p5001__11025.jpg

    Baumer

    FHDM 16N5001

    Diffuse Sensor with Background Suppression (BGS), Pulsed Red LED, 10-30VDC, 20-450mm Sensing Distance Tw, Mechanical 5-Turn, NPN, Light/Dark Operate,2m 4-Pin Cable, -25 to 65°C, IP67

  • baumer-fhdm_16p5001-s14__19522.jpg

    Baumer

    FHDM 16N5001/S14

    Diffuse Sensor with Background Suppression (BGS), Pulsed Red LED, 10-30VDC, 20-450mm Sensing Distance Tw, Mechanical 5-Turn, NPN, Light/Dark Operate, M12 4-Pin Connector, -25 to 65°C, IP67

  • baumer-fhdm_12p5001__11025.jpg

    Baumer

    FHDM 16N5004

    Diffuse Sensor with Background Suppression (BGS), Pulsed Red LED, 10-30VDC, 20-600mm Sensing Distance Tw, Mechanical 5-Turn, NPN, Light/Dark Operate, 2m 4-Pin Cable, -25 to 65°C, IP67

  • baumer-fhdm_16p5001-s14__19522.jpg

    Baumer

    FHDM 16N5004/S14

    Diffuse Sensor with Background Suppression (BGS), Pulsed Red LED, 10-30VDC, 20-600mm Sensing Distance Tw, Mechanical 5-Turn, NPN, Light/Dark Operate, M12 4-Pin Connector, -25 to 65°C, IP67

  • baumer-fhdm_12p5001__11025.jpg

    Baumer

    FHDM 16P5004

    Diffuse Sensor with Background Suppression (BGS), Pulsed Red LED, 10-30VDC, 20-600mm Sensing Distance Tw, Mechanical 5-Turn, PNP, Light/Dark Operate, 2m 4-Pin Cable, -25 to 65°C, IP67

  • baumer-fhdm_16p5001-s14__19522.jpg

    Baumer

    FHDM 16P5004/S14

    Diffuse Sensor with Background Suppression (BGS), Pulsed Red LED, 10-30VDC, 20-600mm Sensing Distance Tw, Mechanical 5-Turn, PNP, Light/Dark Operate, M12 4-Pin Connector, -25 to 65°C, IP67

  • baumer_-_o200.gp_-_sensor_smooth__74843.jpg

    Baumer

    O200.GL-GW1J.72CV/E022_F060

    Photoelectric Diffuse Sensor, Background Suppression, Line Beam, Pulsed Red Laser Diode, 10-30VDC, 3-122mm Sensing Range Tb, Teach-In and IO-Link, Light/Dark Operate, Push-Pull Smooth Sleeve (Stainless Steel), 2m 4-Pin PVC Cable, Plastic (A

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