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 Communication Protocol Maximum DC Voltage Optical Technology Terminal Type Light Source IP Rating Maximum Current Interface
RS-stocknr. 512-4640
FabrikantnummerXUK1ARCNL2
91,50 €
Each
Aantal stuks
Compact Retroreflective 7 m Relay 5-Wire Cable 2m 240V - 240V - - Infrared IP65 3 A -
RS-stocknr. 878-7948
FabrikantnummerXUK1ARCNL2H60
114,00 €
Each
Aantal stuks
Compact Retroreflective 10 m Relay 5-Wire Cable 2m 240V - 240V - Cable LED IP65 3 A -
RS-stocknr. 444-3619
FabrikantnummerXUX0ARCTT16
188,00 €
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 -
RS-stocknr. 444-3530
FabrikantnummerXUK0AKSAM12
115,00 €
Each
Aantal stuks
Compact Through Beam (Emitter) 280 mm → 30 m NPN/PNP 4-Pin M12 Connector - - 24V - - Infrared IP65 100 mA -
RS-stocknr. 455-4983
FabrikantnummerXUK0ARCTL2
134,00 €
Each
Aantal stuks
Compact Multimode 280 mm → 30 m Relay 5-Wire Cable 2m 240V - 240V - - Infrared IP65 3 A -
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 -
RS-stocknr. 753-0283
FabrikantnummerXUK2ARCNL2T
56,00 €
Each
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Compact Through Beam (Emitter) 30 m Solid State 2-Wire Cable 2m 240V - 240V - - Infrared IP65 3 A -
RS-stocknr. 753-0292
FabrikantnummerXUK9APBNL2
86,60 €
Each
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Compact Retroreflective 5 m PNP Cable - - 24V - - LED IP65 100 mA -
RS-stocknr. 752-5045
FabrikantnummerXUB5ANANM12
66,90 €
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Barrel Diffuse 600 mm NPN 4-Pin M12 Connector - - 24V - - Infrared IP65, IP67 100 mA -
RS-stocknr. 444-3445
FabrikantnummerXUB0BPSNL2
96,60 €
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Barrel Multimode 120 mm → 15 m PNP 3-Wire Cable 2m - - 24V - - Infrared IP65, IP67 100 mA -
RS-stocknr. 444-3401
FabrikantnummerXUB0APSNM12
92,60 €
Each
Aantal stuks
Barrel Multimode 120 mm → 15 m PNP 4-Pin M12 Connector - - 24V - - Infrared IP65, IP67 100 mA -
RS-stocknr. 198-756
FabrikantnummerXUB1BPBNL2
63,50 €
Each
Aantal stuks
Barrel Retroreflective 4 m PNP Cable - - 24V - - Infrared IP65, IP67 100 mA -
RS-stocknr. 444-3524
FabrikantnummerXUK0AKSAL2
115,00 €
Each
Aantal stuks
Compact Through Beam (Emitter) 280 mm → 30 m PNP 3-Wire Cable 2m - - 24V - - Infrared IP65 100 mA -
RS-stocknr. 686-2227
FabrikantnummerXUM5APCNL2
69,10 €
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Block Diffuse 1 m PNP Cable - - 24V - - Infrared IP65, IP67 100 mA -
RS-stocknr. 763-9377
FabrikantnummerXUM8APCNL2
76,50 €
Each
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Block Background Suppression 300 mm PNP Cable - - 24V - - LED IP67 100 mA -
RS-stocknr. 753-0353
FabrikantnummerXUM0ANSAM8
124,00 €
Each
Aantal stuks
Block Multimode 100 mm → 10 m NPN 4-Pin M8 Connector - - 24V - - Infrared IP65, IP67 100 mA -
RS-stocknr. 752-5238
FabrikantnummerXUB1ANBNM12
63,80 €
Each
Aantal stuks
Barrel Retroreflective 4 m NPN 4-Pin M12 Connector - - 24V - - Infrared IP65, IP67 100 mA -
RS-stocknr. 281-1537
FabrikantnummerXU8M18MA230
122,00 €
Each
Aantal stuks
Barrel Diffuse 120 mm Relay 2-Wire Cable 2m 240V - 240V - - Infrared IP67 200 mA -
RS-stocknr. 444-3451
FabrikantnummerXUB0BPSNM12
96,60 €
Each
Aantal stuks
Barrel Multimode 120 mm → 15 m PNP 4-Pin M12 Connector - - 24V - - Infrared IP65, IP67 100 mA -
RS-stocknr. 753-0359
FabrikantnummerXUK1APBNM12
79,80 €
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Compact Retroreflective 7 m PNP 4-Pin M12 Connector - - 24V - - Infrared IP65 100 mA -