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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 -
Pepperl+Fuchs
267075-0060
Triangulation Sensor, Background Suppression (BGS), Miniature Design, 10-30VDC, 350mm Range, IO-Link, Smart Sensor, Polycarbonate Housing, PMMA Optical Face, M8 4-Pin Connector, IP67/69/69K, 41.5 x 13.9 x 18.3mm (HWD), OBT Series
$155.68$155.68 -
Pepperl+Fuchs
267075-0122
Photoelectric DuraBeam Laser Retroreflective Sensor, 10-30VDC, 0-12m Detection Range, IO Link, M8 4-Pin Connector, 41.4H x 13.9W x18.3Dmm, IP67/69/69K, Returns of This Item Must Be Approved by Manufacturer
$192.64$192.64 -
Leuze
50129413
Polarized Retro-Reflective Photoelectric Sensor, 0-3m, Laser, Red, PNP, Cable, M12, Metal, 4-Pin, NCNR
$386.00$386.00 -
Available Now! 
Available Now!Autonics
BEN3M-PDT
Photoelectric Sensor, Polarized Retroreflective, 0.1-3m, DC Volt, Solid-State Output (Transistor)
$53.25$53.25 -
Autonics
BH4M-PDT
Photoelectric, Retroreflective, 4m Sensing, 12-24V, NPN/PNP, IP67, Front or Side Mount, Compact
$84.00$84.00 -
Takex
CS-R85
Color Sensor, 12-24VDC, ID of Color Ratios, 10ms or Less, NPN/PNP Changeable Output Mode, IP40, Detects Various Lighting Types from High-Frequency Pulse to DC LED Light Sources
$724.63$724.63 -
Takex
CST-R85
Color Sensor, 12-24VDC, ID of Color Ratios and Brightness, 10ms or less, NPN/PNP Changeable Output Mode, IP40
$922.25$922.25 -
Takex
DLN-S5RVP
Photo Sensor, 50mm, PNP, Short, BGS/FGS Selector, 12-24VDC, Light ON/Dark ON, w/2m Cable, IP67
$129.63$129.63 -
$149.18$149.18 -
$389.89$389.89 -
Baumer
FHDK 04G6101
Subminiature Diffuse Sensor, Background Suppression (BGS), Pulsed Point Source LED, 30mm ±2mm Range Tw, 11-30VDC, Light Operate, Push-Pull, <50mA, 2m 3-Pin Cable, 44.8 x 4 x 6.2mm (HWD), Plastic (ASA) Housing, PMMA Optics, -10 to 50°C, IP65
$399.49$399.49
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