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ET318B.3/2N-M12
Energetic Diffuse Sensor, 10-30VDC, Red LED Light Source, 620nm, NPN, Light/Dark Switching, Teach Button, M12 Male 4-Pin A-Coded Connector, 18 x 46mm, Plastic Housing/Lens, -40 to +60C, IP67, 318B Series
$106.00$106.00 -
Leuze
ET318B.3/4P-M12
Energetic Diffuse Sensor, 10-30VDC, Red LED Light Source, 620nm, PNP, Light/Dark Switching, Teach Button, M12 Male 4-Pin A-Coded Connector, 18 x 46mm, Plastic Housing/Lens, -40 to +60C, IP67, 318B Series
$106.00$106.00 -
Leuze
PRK25C/4P-M8
Polarized Retroreflective Sensor, 10-30VDC, 0.05-12m Range Limit with Reflector TK(S) 100X100, Red LED, 640nm, PNP, Light/Dark Switching, M8 Male 4-+Pin PUR Connector, 15 x 42.7 x 30mm (WHL), Plastic Housing/Lens, ECOLAB, IP67/69K
$177.00$177.00 -
$82.88$82.88 -
Leuze
PRK28.3/4P-M12
Polaraized Retroreflective Sensor, 10-30VDC, 6m with TK(S) 100 x 100 Reflector, Red LED, 620nm, 2 Digital Outputs, PNP, Light/Dark Switching, Teach Button, M12 A-Coded Male 4-Pin Connector, 15 x 46.5 x 31.8mm (WHL), IP67
$104.63$104.63 -
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50122695
Polarized Retroreflective Sensor, 10-30VDC, 6m Range with TK(S) 100 x 100 Reflector, Red LED, 620nm, 2 Outputs, PNP, Light/Dark Switching, Teach Button, M12 A-Coded Male 4-Pin Connector, 18mm Diameter x 46mm L, IP67
$146.00$146.00 -
Leuze
50122689
Polarized Retroreflective Sensor, 10-30VDC, 5mm Range with TK(S) 100 x 100 Reflector, Red LED, 620nm, 2 Outputs, PNP, Light/Dark Switching, Teach Button, M12 A-Coded Male 4-Pin Connector, 18mm Diameter x 61mm L, IP67
$162.00$162.00 -
Leuze
50144967
Diffuse Sensor with Background Suppression, 10-30VDC, 0.005-0.45m Range, Focused Beam, Red LED, 633nm, 2 Switching O/P 1: NPN Light, O/P 2: NPN Dark, 0.2m Black PUR Cable, M12 Male 4-Pin A-Coded Metal Connector, ECOLAB, IP67/69K, 3C Series
$207.49$207.49 -
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50137158
Polarized Retroreflective Sensor, 10-30VDC, Switching Output 1: Push-Pull Light PNP/Dark NPN and Output 2: Push-Pull Dark PNP/Light NPN, 0.2 Black PUR Cable with M12 Male 4-Pin A-Coded Metal Connector, 11.4 x 34.2 x 18.3mm (WHL), 3C Series
$156.55$156.55 -
Leuze
50137157
Polarized Retroreflective Sensor, 10-30VDC, 0.01-6m Range Limit with Reflector TK(S) 100x100, Red LED, 633nm, Push-Pull, Light (PNP/Dark (NPN) + Dark (PNP)/Light (NPN) Switching, 0.2m Cable M8 Connector, 11.4 x 34.2 x 18.3mm (WHL), IP67/69K
$184.90$184.90 -
Leuze
50136263
Polarized Retroreflective Sensor, 10-30VDC, 0.5m Range Limit, Autocollimation, Red Laser, 655nm, NPN, Light/Dark, LED, Teach Button, 2m Black PUR 4-Wire Cable, 11.4 x 34.2 x 18.3mm (WHL), PC-ABS with PMMA Lens, ECOLAB, -40 to +55C, IP67/69K
$366.70$366.70 -
Leuze
50136253
Polarized Retroreflective Sensor, 10-30VDC, 0.5m Range Limit, Autocollimation, Red Laser, 655nm, NPN, Light/Dark, LED, Teach Button, M8 Male 4-Pin Connector, 11.4 x 34.2 x 18.3mm (WHL), Red PC-ABS/PMMA Lens, ECOLAB, -40 to +55C, IP67/69K
$371.84$371.84
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