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Available Now! 
Available Now!Pepperl+Fuchs
905779
Photoelectric, Light On/Dark On, Retroreflective, IP67, M12 Connector, 3.5m Sensing, DC, Polarized
$118.72$118.72 -
Available Now! 
Available Now!Baumer
FHDK 14P5101/S14
Diffuse Sensor, Background Suppression (BGS), Pulsed Red LED, 20-350mm Range Tw, Mech. 10-Turn Adj., 10-30VDC, Light/Dark Operate, PNP, <100mA, M12 4-Pin Connector, 43 x 14.8 x 31mm HWD, Plastic Housing, PMMA Optics, -25 to +65°C, IP67
$341.71$341.71 -
Leuze
50129377
Diffuse Sensor with Background Suppression, 10-30VDC, 0.005-0.45m Range, Red LED, PNP, Light/Dark Switching, 0.2m Black PUR Metal Male 4-Pin Cable, M12, 11.4 x 34.2 x 18.3mm WHL, IP67/IP69K
$207.49$207.49 -
Pepperl+Fuchs
128098
Photoelectric, Light On/Dark On, Retroreflective, M12 Plug, IP67, 0 to 15m Adjustable
$637.56$637.56 -
Pepperl+Fuchs
295670-100156
OBT650-R201-2EP-IO-V1, Photoelectric Sensor, BGS, 650mm, LED, 10-30VDC, 4-in-1 Output, IO-Link, M12
$193.76$193.76 -
Pepperl+Fuchs
295670-100035
Photoelectric Retroreflective Laser Sensor, 25m, 10-30V, 4-Pin Output, IO-Link, M12
$231.84$231.84 -
Pepperl+Fuchs
295670-100012
Photoelectric Retroreflective Sensor, Polarization Filter, LED, H85-2 Reflector Target, 10-30VDC, 0-15m Range, IO-Link, Smart Sensor Type 2.4, 2 Push-Pull 4-in-1 Signal Outputs, M12 x 1, 4-Pin 90° Rotatable Connector, IP67/69/69K, 50.6 x 15
$159.04$159.04 -
Pepperl+Fuchs
295670-100058
Photoelectric Sensor, Diffuse, 1.4m, LED, 10-30VDC, 4-in-1 Output, IO-Link, M12, Returns of This Item Must Be Approved by Manufacturer
$154.56$154.56 -
Pepperl+Fuchs
132616
Print Mark Contrast Sensor, Diffuse Mode, 10-30VDC, 11mm ± 2 mm Range, Teach-In, Light/Dark On, 2 Push-Pull O/P, M12 5 Pin, Nickel Plated Die-Cast Zinc, Plastic Optics, -20 to 60°C Ambient Temp., 41.5 x 49 x 15mm (WHD), IP67
$501.76$501.76 -
Pepperl+Fuchs
183439
Photoelectric, Light On/Dark On, Diffused, Backgr, 350mm Sensing, Background Suppression
$357.28$357.28 -
Pepperl+Fuchs
206277
Print Mark Contrast Sensor, 10-30VDC / 18-30VDC in IO-Link V1.0, 11 mm ± 2 mm Range, Teach In, Light/Dark On, 2 Push-Pull O/P, M12 4 Pin, Nickel Plated Die-Cast Zinc, Plastic Optics, -20 to +60°C Ambient Temp., 41.5 x 49 x 15mm (WHD), IP67
$517.44$517.44 -
Pepperl+Fuchs
267075-100104
Photoelectric, DC, Thru-Beam (Receiver), LED, 0-12m, M12 Quick Disconnect with 300mm Cable
$96.32$96.32
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:
- Background Suppression: Can ignore objects beyond a set distance, focuses close range
- Color or Contrast Sensors: Detects specific colors or contrast differences
- Distance Measuring Sensors: Mesaure the distance to an object
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