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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  • pf_obr25m-r200-2ep__09180.jpg

    Pepperl+Fuchs

    295670-100034

    Photoelectric DuraBeam Laser Retroreflective Sensor, 10-30VDC, 0-25m Detection Range, IO Link, 2m Cable, 50.6H x 15W x 41.7Dmm, IP67/69/69K, Returns of This Item Must Be Approved by Manufacturer

  • pf_obr25m-r201-2ep__35385.jpg

    Pepperl+Fuchs

    295670-100087

    Photoelectric DuraBeam Laser Retroreflective Sensor, 10-30VDC, 0-25m Detection Range, IO Link, 2m Cable 61.7H x 15W x 41.7Dmm, IP67/69/69K, Returns of This Item Must Be Approved by Manufacturer

  • obr25m-r201-2ep-io-v1-l__35465.jpg

    Pepperl+Fuchs

    295670-100088

    Photoelectric Sensor, Retroreflective, 25m, Laser, 10-30V, 4-in-1 Output, IO-Link, M12, Returns of This Item Must Be Approved by Manufacturer

  • pf_la28-las-f1-7675__03243.jpg

    Pepperl+Fuchs

    314850

    Sensor, Thru-Beam, Pair Consists of: LA28-LAS-F1-7675 (Emitter) & LK28-LAS-F1-Z-7675 (Receiver), 120m Detection Range, Red Light, Light/Dark On, 88mmH x 25.8mmW x 65.5mmD, IP67, Returns of This Item Must Be Approved by Manufacturer

  • pepperl_fuchs_-_418066_-_sensor__78320.jpg

    Pepperl+Fuchs

    418066

    Print Mark Contrast Sensor, 10-30VDC, 300mm Range, Laser Diode, 650nm, Light On/Dark On Switchable, Push-Pull O/P, PNP, M12 5 Pin Connector, PC (Makrolon), Glass Optics, -10 to +50°C Ambient Temperature, 33 x 85.6 x 60.8mm (WHD), IP67

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