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. 753-0292
FabrikantnummerXUK9APBNL2
86,60 €
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Aantal stuks
Compact Retroreflective 5 m PNP Cable - - 24V - - LED IP65 100 mA -
RS-stocknr. 808-9143
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FabrikantPanasonic
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Aantal stuks
Block Diffuse 15 → 100 mm NPN 2m Cable - - 24V - - LED IP67 100 mA -
RS-stocknr. 763-7895
FabrikantnummerVTF18-4P1240
FabrikantSick
86,84 €
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Barrel Background Suppression 3 → 100 mm PNP 4-Pin M12 Connector - - 30V - - Infrared IP67 100 mA -
RS-stocknr. 371-4651
FabrikantnummerVL18-3P3840
FabrikantSick
89,96 €
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Aantal stuks
Barrel Retroreflective 5 mm → 3.7 m PNP 4-Pin M12 Connector - - 30V - - LED IP67 100 mA -
RS-stocknr. 859-3005
FabrikantnummerS142ARNN924
FabrikantCarlo Gavazzi
305,98 €
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Aantal stuks
Block - - NPN/PNP - 24V - 24V - - LED IP20 - -
RS-stocknr. 814-0361
FabrikantnummerOID200
Fabrikantifm electronic
163,20 €
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Aantal stuks
Barrel Background Suppression 30 mm → 2 m NPN/PNP M12 Connector - IO-LINK 30V - Wire Lead LED IP65, IP67 <75 mA IO-Link
RS-stocknr. 780-0028
FabrikantnummerOBR1000-R2-E0
FabrikantPepperl + Fuchs
96,43 €
Each
Aantal stuks
Block Retroreflective 0 → 1 m NPN - - - 30V - Cable LED IP67 50 mA -
RS-stocknr. 714-1625
FabrikantnummerML100-55/95/103
FabrikantPepperl + Fuchs
76,35 €
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Block Retroreflective 5 m PNP 4-Pin M8 Connector - - 30V - - LED IP67 100 mA -
RS-stocknr. 488-126
FabrikantnummerO5H200
Fabrikantifm electronic
128,00 €
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Aantal stuks
Block Diffuse 50 → 1400 mm PNP M12 Connector - - 36V - - LED IP65 200 mA -
RS-stocknr. 627-8388
FabrikantnummerOPB715-Z
FabrikantOptek
5,47 €
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Aantal stuks
Block Retroreflective 12.7 mm - - - - 5.25V - Wire Lead LED - - -
RS-stocknr. 510-3255
FabrikantnummerRLK29-55/25/116-SET
FabrikantPepperl + Fuchs
108,38 €
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Block Retroreflective 12 m Relay 6-Terminal Screw 230V - 230V - - LED IP67 2 A -
RS-stocknr. 752-5045
FabrikantnummerXUB5ANANM12
66,90 €
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Aantal stuks
Barrel Diffuse 600 mm NPN 4-Pin M12 Connector - - 24V - - Infrared IP65, IP67 100 mA -
RS-stocknr. 170-0725
FabrikantnummerOPB715-Z
FabrikantOptek
5,361 €
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Aantal stuks
Block Retroreflective 12.7 mm - - - - 5.25V - Wire Lead LED - - -
RS-stocknr. 768-5897
FabrikantnummerE3FARP122M
FabrikantOmron
63,10 €
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Aantal stuks
Barrel Retroreflective 0 → 500 mm PNP Pre-Wired Cable - - 30V - - LED IP67, IP69K 25 mA -
RS-stocknr. 124-0324
FabrikantnummerOBT350-R100-2EP-IO-V31-1T
FabrikantPepperl + Fuchs
95,85 €
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Aantal stuks
Block Background Suppression 5 → 350 mm NPN/PNP 4-Pin M8 Connector - IO-LINK 30V - 4-Pin Connector LED IP67, IP69, IP69K 100 mA IO-Link
RS-stocknr. 405-7280
FabrikantnummerT30SP6RQ
FabrikantBanner
91,69 €
Each
Aantal stuks
Barrel Through Beam (Receiver) 60 m PNP M12 Connector - - 30V - - Infrared IP69K 150 mA -
RS-stocknr. 842-8560
FabrikantnummerWTB2S-2P3130
FabrikantSick
120,64 €
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Aantal stuks
Block Background Suppression 1 → 36 mm PNP 3-Pin M8 Connector 0.2m Cable - - 30V - M8 LED IP67 20 mA -
RS-stocknr. 617-0666
FabrikantnummerE3ZLR86
FabrikantOmron
154,30 €
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Aantal stuks
Block Retroreflective 0.2 → 7 m PNP 4-Pin M8 Connector - - 26.4V - - LED IP67 100 mA -
RS-stocknr. 786-5889
FabrikantnummerVL18-4P3240
FabrikantSick
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Barrel Retroreflective 50 mm → 3.7 m PNP 4-Pin M12 Connector - - 30V - - LED IP67 100 mA -
RS-stocknr. 219-2274
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Fork Through Beam (Fork) 5 mm NPN Connector - - 24V - - Infrared IP50 100 mA -
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