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Leuze
50137052
Diffuse Sensor with Background Suppression, 0.005-0.45m, LED, Red, Connector, M8, Metal, 4-Pin
$213.00$213.00 -
Available Now! 
$148.82$148.82 -
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
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 -
Pepperl+Fuchs
808389
Fiber Optic Sensor for Glass and Plastic Fiber Optics, Ultra High Power, 10-30VDC, Detection Range up to 1500mm, Light/Dark On Switchable, -10 to +55°C (14 to +131°F), 2m PVC Cable, 9 x 34.5 x 62.3mm (WHD), IP50
$221.76$221.76 -
Pepperl+Fuchs
911542
Photoelectric Sensor, Slot for Label Detection, Thru-Beam, 3mm Slot, M12 5-Pin Pigtail, Returns of This Item Must Be Approved by Manufacturer
$239.68$239.68 -
Pepperl+Fuchs
912568
Luminescence Sensor, 190mm Sensing, Discrete Output, Returns of This Item Must Be Approved by Manufacturer
$1,319.36$1,319.36 -
Pepperl+Fuchs
912569
Luminescence Sensor, 190mm Sensing, Discrete & Analog Output, Returns of This Item Must Be Approved by Manufacturer
$1,599.36$1,599.36 -
Pepperl+Fuchs
912570
Luminescence Sensor, 254mm Sensing, Discrete Output, Returns of This Item Must Be Approved by Manufacturer
$1,319.36$1,319.36 -
Pepperl+Fuchs
912571
Luminescence Sensor, 254mm Sensing, Discrete & Analog Output, Returns of This Item Must Be Approved by Manufacturer
$1,599.36$1,599.36 -
Pepperl+Fuchs
912572
Luminescence Sensor, 330mm Sensing, Discrete Output, Returns of This Item Must Be Approved by Manufacturer
$1,319.36$1,319.36 -
Pepperl+Fuchs
912575
Luminescence Sensor, 609mm Sensing, Discrete & Analog Output, Returns of This Item Must Be Approved by Manufacturer
$2,014.88$2,014.88
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