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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  • cg_moft20-m12-5__50503.jpg

    Carlo Gavazzi

    MOFT20-M12-5

    Photoelectric Thru-Beam Sensor for Separate Amplifier, Transmitter, M12, 20m Range, Optical Angle 5°, Cable Connection, Modulated, Infrared Light 880nm, M12 Stainless Steel Housing

  • cg_moft20-m14-8__95568.jpg

    Carlo Gavazzi

    MOFT20-M14-8

    Photoelectric Thru-Beam Sensor for Separate Amplifier, Transmitter, M14, 20m Range, Optical Angle 8°, Cable Connection, Modulated, Infrared Light 880nm, M14 Stainless Steel Housing

  • takex_ne2_diffusereflective__22395.jpg

    Takex

    NE2-T50-J2

    Photoelectric Throughbeam Sensor, 12-24VDC, 50m Range, NPN/PNP, Light ON/Dark ON (with Control Lead), Infrared LED (880nm), Polycarbonate Housing, Acrylic Lens, M12 Quick Disconnect (90° Adjustable), IP67

  • Takex_NT100_Primary.jpg

    Takex

    NT100

    Thru-Beam CMD Sensor Set (Transmitter + Receiver), 12-24VDC, 100m Detecting Distance, NPN Output, Light On/Dark On Switch Selectable, Rating: Sink current 200mA (30VDC), 5m Response Time, DIN Compatible Zinc Die-Cast, IP66

  • Takex_NT100P_Primary.jpg

    Takex

    NT100P

    Thru-Beam CMD Sensor Set (Transmitter + Receiver), 100-240VAC, 100m Detecting Distance, Relay Output, Light On/Dark On Switch Selectable, Rating: 250VAC 2A, 20ms Response Time, DIN Compatible Zinc Die-Cast, IP66

  • Takex_NT50_Primary.jpg

    Takex

    NT50

    Thru-Beam CMD Sensor Set (Transmitter + Receiver), 12-24VDC, 50m DetectingDistance, NPN Output, Light On/Dark On Switch Selectable, Rating: Sink current 200mA (30VDC), 5m Response Time, DIN Compatible Zinc Die-Cast, IP66

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