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.

Additional Sensor Categories:
Proximity | Ultrasonic | Pressure | Temperature | Level | Tilt

 

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  • baumer_fhdk04_870x630_2__95585.jpg

    Baumer

    FHDK 04G6102

    10162786

    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

  • idec_sa1e-bn1c_23__69628.jpg

    IDEC

    SA1E-XP2C

    SA1E Series, Non-Cancellable, No Returns

    Photoelectric, PNP, Light ON, Transparent, up to 2m sensing, M8 connector (Needs Cable), NCNR

  • baumer_fhdk14_2_870x630_4__55342.jpg

    Baumer

    FHDK 14N5101/S35A

    11001032

    Diffuse Sensor, Background Suppression (BGS), Pulsed Red LED, 20-350mm Range Tw, Mechanical 10-Turn Adj., 10-30VDC, Light/Dark Operate, NPN, <100mA, M8 4-Pin Connector, 43 x 14.8 x 31mm HWD, Plastic Housing, PMMA Optics, -25 to +65°C, IP67

  • baumer_fhdk10_870x630__51396.jpg

    Baumer

    FHDK 10P5160/S35A

    10151937

    Miniature Diffuse Sensor, Background Suppression, Pulsed Red LED, 10-30mm Range Tw, Mech. 5-Turn Adj., 10-30VDC, Light/Dark Operate, PNP, <100mA, M8 4-Pin Connector, 27 x 10.4 x 14mm (HWD), Plastic ASA Housing, PMMA Optics, -25 to +65°C, IP

  • baumer-o300.sp-gw1b.72n_5__25352.jpg

    Baumer

    O500.SP-GW1B.72O

    11096080

    SmartReflect Light Barrier, 10-30VDC, 60-600mm Background Position Sde, Pulsed PinPoint LED, 630 nm, Push-Pull, qTeach/External, Light/Dark Operate, M12 4-Pin Connector, Plastic Housing, PMMA Optics, 45 x 18 x 32mm (HWD), -25 to 60°C Operat

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

Additional Sensor Categories:
Proximity | Ultrasonic | Pressure | Temperature | Level | Tilt

 

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