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ET28.3/2N-200-M12
Energetic Diffuse Sensor, M18 Thread Size, 10-30VDC, NPN, Light/Dark Switching, LED Display, Teach Button, 0.2m Cable with M12 Male 4-Pin A-Coded Connector, 15 x 46.5 x 31.8mm (WHL), Plastic Housing/Lens, -40 to +60C, IP67, 28 Series
$106.18$106.18 -
Leuze
ET28.3/4P-200-M12
Energetic Diffuse Sensor, M18 Thread Size, 10-30VDC, PNP, Light/Dark Switching, Red LED, 620nm, Teach Button, 0.2m Cable with M12 Male 4-Pin A-Coded Connector, 15 x 46.5 x 31.8mm (WHL), Plastic Housing/Lens, -40 to +60C, IP67, 28 Series
$106.18$106.18 -
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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 -
Leuze
PRK28/2N-M12
Polarized Retroreflective Sensor, 10-30VDC, 0.02-6m Range Limit with Reflector TK(S) 100x100, Red LED, 620nm, NPN, Light/Dark Switching, M12 Male 4-Pin A-Coded Connector, 15 x 46.5 x 31.8mm (WHL), ABS Body/Plastic Lens, -40 to +60C, IP67
$113.00$113.00 -
Leuze
PRK28/4P-200-M12
Polarized Retroreflective Sensor, 10-30VDC, 0.02-6m Range Limit with Reflector TK(S) 100x100, Red LED, 620nm, PNP, Light/Dark Switching, 0.2 PUR Cable & M12 Male 4-Pin A-Coded Connector, 15 x 46.5 x 31.8mm (WHL), ABS Body/Plastic Lens, IP67
$104.63$104.63
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