Photoelectric Sensors

Photoelectric sensors detect and measure physical objects or quantities by emitting a field or beam of electromagnetic radiation, an object is detected by measuring alterations in the return signal. There are 3 main types of photoelectric sensors which provide reliable detection, these are through-beam, retro-reflective and diffuse. The basic function of each is to detect the presence or absence of objects or measure the distance to the object.

Through-beam Sensors

Through-beam sensors (aka thru-beam) rely on two separate housings, one for the transmitter and one for the receiver, with the transmitter providing a continuous beam of light to the receiver. Each time an object passes through the beam this interrupts the signal between the transmitter and receiver, which in turn causes the receiver to send an electrical signal to the output. Through-beam sensors are suited to long-distance sensing and are capable of detecting almost any object, irrespective of colour or angular motion.

Retro-reflective Sensors

Retro-reflective photoelectric sensors (retroreflective) have both the transmitter and receiver contained within the same housing but require a reflector opposite to the sensor. The reflector bounces the light beam back to the transmitter until an object breaks the beam. Objects which are highly reflective such as aluminium require sensors with polarising filters. The filter allows the sensor to acknowledge that the reflected light from reflecting materials is different from the reflector.

Diffuse Sensors

Diffuse sensors (proximity sensor) are easier to install as only one device has to be mounted. This is because the transmitter and receiver are contained within one housing. Diffuse sensors use the reflection from the target object within a predetermined sensing range. The transmitter sends out a continuous beam of light, once this hits the target it is diffused in all directions, a part of this light is reflected back and recognised by the receiver, the receiver then sends an electrical signal to the output.

A special type of diffused mode is background suppression which enables the user to precisely control the sensing range. A diffuse mode sensor with background suppression is less sensitive to the target colour. They can also use a visible red light or infrared light sources.


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Omschrijving Prijs Sensor Style Detection Type Detection Range Output Type Electrical Connection Maximum AC Voltage Maximum DC Voltage Optical Technology Terminal Type Light Source IP Rating Maximum Current Interface Response Time
RS-stocknr. 512-4640
FabrikantnummerXUK1ARCNL2
89,70 €
Each
Aantal stuks
Compact Retroreflective 7 m Relay 5-Wire Cable 2m 240V 240V - - Infrared IP65 3 A - <25 ms
RS-stocknr. 729-5151
FabrikantRS PRO
89,71 €
Each
Aantal stuks
Block Retroreflective 0.15 10 m PNP 4-Wire Cable 2m - 30V - - LED IP67 100 mA - 2.5 ms
RS-stocknr. 878-7948
FabrikantnummerXUK1ARCNL2H60
112,00 €
Each
Aantal stuks
Compact Retroreflective Maximum of 10 m Relay 5-Wire Cable 2m 240V 240V - Cable LED IP65 3 A - -
RS-stocknr. 444-3619
FabrikantnummerXUX0ARCTT16
186,00 €
Each
Aantal stuks
Block Multimode 1.3 m, 2 m, 11 m, 40 m Relay 5-Terminal Screw 240V 240V - - Infrared IP65, IP67 3 A, 500 mA - <25 ms
RS-stocknr. 444-3530
FabrikantnummerXUK0AKSAM12
115,00 €
Each
Aantal stuks
Compact Through Beam (Emitter) 0.28 m, 0.8 m, 4 m, 30 m NPN/PNP 4-Pin M12 Connector - 24V - - Infrared IP65 100 mA - <2 ms
RS-stocknr. 498-1795
FabrikantnummerFHDK 10P5101
FabrikantBaumer
153,51 €
Each
Aantal stuks
Block Diffuse 20 120 mm PNP 4-Wire Cable 2m - 30V - - LED IP65 100 mA - <1 ms
RS-stocknr. 768-9473
FabrikantnummerWTB9-3P2461
FabrikantSick
158,00 €
Each
Aantal stuks
Block Background Suppression 20 350 mm NPN/PNP 4-Pin M12 Connector - 30V - - LED IP66, IP67, IP69K 100 mA - <0.333 ms
RS-stocknr. 455-4983
FabrikantnummerXUK0ARCTL2
132,00 €
Each
Aantal stuks
Compact Multimode 0.28 m, 0.8 m, 4 m, 30 m Relay 5-Wire Cable 2m 240V 240V - - Infrared IP65 3 A - <25 ms
RS-stocknr. 816-0374
FabrikantnummerE3FCRN21
FabrikantOmron
77,75 €
Each
Aantal stuks
Barrel Retroreflective 0.1 4 m NPN M12 Connector - 30V - Cable LED IP67, IP68, IP69K 25 mA - 0.5 ms
RS-stocknr. 842-8541
FabrikantnummerGL10-P4212
FabrikantSick
80,00 €
Each
Aantal stuks
Block Retroreflective 0.08 15 m PNP M12 Connector - 30V - M12 LED IP67 20 mA - 500 μs
RS-stocknr. 908-7163
FabrikantnummerOPB829DZ
FabrikantOptek
3,76 €
Each
Aantal stuks
Block Through Beam (Fork) 3.18 8 mm Phototransistor Wire - 1.7V - Wire Lead LED - 50 mA - -
RS-stocknr. 739-6673
FabrikantnummerO1D100
Fabrikantifm electronic
312,59 €
Each
Aantal stuks
Block Diffuse 0.2 10 m PNP M12 Connector - 30V - - Laser Light IP67 200 mA - -
RS-stocknr. 753-0283
FabrikantnummerXUK2ARCNL2T
56,00 €
Each
Aantal stuks
Compact Through Beam (Emitter) 30 m Solid State 2-Wire Cable 2m 240V 240V - - Infrared IP65 3 A - <25 ms
RS-stocknr. 444-3552
FabrikantnummerXUK0AKSAM12T
56,00 €
Each
Aantal stuks
Compact Through Beam (Emitter) 30 m - 4-Pin M12 Connector - 24V - - Infrared IP65 100 mA - <=2 ms
RS-stocknr. 786-5920
FabrikantnummerWTB4-3P2261
FabrikantSick
155,00 €
Each
Aantal stuks
Block Background Suppression 4 150 mm PNP 4-Pin M8 Connector - 30V - - LED IP66, IP67 100 mA - <0.5 ms
RS-stocknr. 807-4551
FabrikantnummerEE-SX1103
FabrikantOmron
1,67 €
Each
Aantal stuks
Block Diffuse - - - 1.6V - - PCB Pin - - 50 mA - 10 μs
RS-stocknr. 288-9805
FabrikantnummerWT150-P460
FabrikantSick
141,50 €
Each
Aantal stuks
Block Diffuse 2 100 mm PNP 4-Pin M8 Connector - 30V - - LED IP67 100 mA - <=0.5 ms
RS-stocknr. 902-7124
FabrikantnummerBOS 12M-PS-PR10-02
FabrikantBALLUFF
80,77 €
Each
Aantal stuks
Barrel Retroreflective Maximum of 3000 mm PNP Cable - 30V - Cable LED IP67 100 mA - 0.5 ms
RS-stocknr. 842-8566
FabrikantnummerWTB2S-2P3110
FabrikantSick
117,50 €
Each
Aantal stuks
Block Background Suppression 1 18 mm PNP 3-Pin M8 Connector 0.2m Cable - 30V - M8 LED IP67 20 mA - 0.4 ms
RS-stocknr. 842-8548
FabrikantnummerGL10G-P4252
FabrikantSick
92,50 €
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Aantal stuks
Block Retroreflective 0.15 12 m PNP M12 Connector - 30V - M12 LED IP67 20 mA - 1 ms
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