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Autonics
BTF30-DDTL
Photoelectric Sensor, Diffuse Reflective, 1-15mm, NPN, Light On, Red LED, 12-24VDC
$79.00$79.00 -
Carlo Gavazzi
EO1804PPAS-1
Photoelectric Diffuse Reflective Sensor, M18, 10-40VDC, 400mm Range, PNP, 4-Wire Complementary, NO/NC, M12 Plug, Modulated, Infrared Light 880nm, LED Indication, IP67
$146.07$146.07 -
Baumer
FHDM 12P5001
Diffuse Sensor With Background Suppression-Miniature, 15...300 mm Sensing Distance, Pulsed Red LED, PNP, Mechanical (5 Turn), 2 Meter Cable Length (4 Pin), IP67
$476.40$476.40 -
$123.60$123.60 -
Takex
GS20N
Photoelectric Sensor, Diffuse Reflective, NPN, Infrared LED, 200mm Range, 12/24VDC, Cable, IP67, Head-On
$112.20$112.20 -
Available Now! 
Available Now!Leuze
HT25C/4P-M12
Diffuse Sensor with Background Suppression, 10-30VDC, 1.2m Range Limit, Red Laser, 640nm, PNP, Light/Dark Switching, M12 4-Pin A-Coded PUR Connector, 15 x 42.7 x 30mm (WHL), Plastic Housing/Lens, ECOLAB, IP67/69K, 25C Series
$218.78$218.78 -
Baumer
O200.GR-GW1J.72CV/E026_H006
Miniature Photoelectric Diffuse Sensor with Background Suppression (BGS)
$238.80$238.80 -
Baumer
O500.SP-GW1B.72O
SmartReflect Light Barrier, 10-30VDC, 60-600mm Background Position Sde, Pulsed PinPoint LED, 630 nm, Push-Pull, qTeach/External, Light/Dark Operate, M12 4-Pin Connector, Plastic Housing, PMMA Optics, 45 x 18 x 32mm (HWD), -25 to 60°C Operat
$284.60$284.60 -
Baumer
OM20-P0120.HH.YUN
Photoelectric Distance Sensor, Laser Point, 16-120mm Range, Analog and Digital Output Signal: 0-10VDC/0-5VDC, 12-28VDC, 50mA, Teach-In Button/IO Link, Pulsed Red Laser Diode, Die-Cast Zinc, M8 4-pin Connector, IP67, -10 to +50°C° Operating
$1,725.60$1,725.60 -
Carlo Gavazzi
PA18CLR30TO
Photoelectric, Retro-Reflective, Ø18mm, 20-250VAC, 3m Range, SCR NO, 2m Cable, IP67
$137.88$137.88 -
Pepperl+Fuchs
128098
Photoelectric, Light On/Dark On, Retroreflective, M12 Plug, IP67, 0 to 15m Adjustable
$637.56$637.56 -
Pepperl+Fuchs
267075-100496
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
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