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Takex
AS-U25
Photoelectric Sensor, Thru-Beam, U Shape, NPN, Red LED, 25mm Fixed Detect, 2mm Diameter, Cable
$112.20$112.20 -
Available Now! 
Available Now!Pepperl+Fuchs
188552
Retroreflective Sensor, M18 Threaded, 10-30VDC, 6.5m Detection Range, NPN, Light On, 4 LED Indicators for 360° Visibility, M12 3-Pin x 1 Connector, PC Housing, PMMA Optical Face, -25 to +60°C (-13 to +140°F) Ambient Temperature, IP67, NCNR
$79.00$79.00 -
Takex
GSM2RSPN
Photoelectric Sensor, Polarized Reflective, PNP, Red LED, .01 to 2m Range, 12/24VDC, Cable, IP67, Side-On
$130.05$130.05 -
$154.51$154.51 -
Takex
GMR2RSN
Photoelectric Sensor, Amplifier, Diffuse, NPN, Red LED, IP67, Compact, Cable, 1500mm Range
$130.48$130.48 -
Takex
GR12RSN
Photoelectric Sensor, Convergent Reflective, NPN, Color Mark, Red LED, Cable, 12mm Range
$176.80$176.80 -
Autonics
BRQM100-DDTA
Photoelectric Diffuse Reflective Sensor, Metal Body, 10-30VDC, 100mm Sensing Range, NPN, Light & Dark On
$72.00$72.00 -
Baumer
FPDK 10N5135/S35A
Retroreflective Sensor, Miniature, Pulsed Red LED, 10-30VDC, 3.5m Actual Range Sb, 4m Nominal Range Sn, Potentiometer, 240°, NPN, Light/Dark Operate, M8 4-Pin Connector, 27 x 10.4 x 16.3mm (HWD), Plastic ASA Housing, PMMA Optics, -20° to +6
$253.20$253.20 -
Carlo Gavazzi
VP02-110TB
Photoelectric Optical Level Sensor, 110VAC NO, AC Output, Polysulphone Housing
$178.83$178.83 -
Pepperl+Fuchs
216896
Photoelectric Triangulation Diffuse Reflective Sensor with Background Suppression, Miniature Design, 350mm Adjustable Range, Red Light, Light/Dark On, NPN Output, M8 4-Pin Plug
$182.56$182.56 -
$98.00$98.00 -
Baumer
FHDM 12N5001
Diffuse Sensor With Background Suppression-Miniature, 15...300 mm Sensing Distance, Pulsed Red LED, NPN, Mechanical (5 Turn), 2 Meter Cable Length (4 Pin), 10...30VDC, IP67
$476.40$476.40
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