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Leuze
50133701
Polarized Retroreflective Sensor, 10-30VDC, 0.5m Range Limit, Autocollimation, Red Laser, 655nm, PNP, Light/Dark, LED, Teach Button, 0.2m Cable M8 Connector, 11.4 x 34.2 x 18.3mm (WHL), PC-ABS with PMMA Lens, ECOLAB, -40 to +55C, IP67/69K
$409.59$409.59 -
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 -
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
$396.27$396.27 -
Leuze
50137052
Diffuse Sensor with Background Suppression, 0.005-0.45m, LED, Red, Connector, M8, Metal, 4-Pin
$210.90$210.90 -
Available Now! 
$172.57$172.57 -
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
$199.80$199.80 -
Leuze
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
$154.85$154.85 -
Leuze
50137233
Polarized Retro-Reflective Photoelectric Sensor, 0-0.5m, Laser, Red, PNP, Cable, 2,000 mm, 4-Wire
$366.70$366.70 -
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
$224.22$224.22
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