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. 768-5881
FabrikantnummerE3FARP21
FabrikantOmron
€ 59,90
Each
Aantal stuks
Barrel Retroreflective 0.1 → 4 m PNP 4-Pin M12 Connector - 30V - - LED IP67, IP69K 25 mA - 0.5 ms
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FabrikantnummerE3ZR86
FabrikantOmron
€ 97,00
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Block Retroreflective 100 mm → 4 m PNP 4-Pin M8 Connector - 26.4V - - LED IP69K 100 mA - 1 ms
RS-stocknr. 617-0701
FabrikantnummerE3ZM-R86
FabrikantOmron
€ 169,50
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Block Retroreflective 100 mm → 4 m PNP 4-Pin M8 Connector - 30V - - LED IP69K 100 mA - 1 ms
RS-stocknr. 617-0650
FabrikantnummerE3Z-LR81 2M
FabrikantOmron
€ 152,00
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Block Retroreflective 0.2 → 7 m PNP 3-Wire Cable 2m - 26.4V - - LED IP67 100 mA - 1 ms
RS-stocknr. 768-5891
FabrikantnummerE3FARP22
FabrikantOmron
€ 62,15
Each
Aantal stuks
Barrel Retroreflective 0 → 500 mm PNP 4-Pin M12 Connector - 30V - - LED IP67, IP69K 25 mA - 0.5 ms
RS-stocknr. 219-2331
FabrikantnummerEE-SPX403N
FabrikantOmron
€ 33,40
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Fork Through Beam (Fork) 13 mm NPN Non-Solder Connector - 24V - - Infrared IP50 80 mA - -
RS-stocknr. 219-2319
FabrikantnummerEE-SPX303N
FabrikantOmron
€ 33,41
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Fork Through Beam (Fork) 13 mm NPN Non-Solder Connector - 24V - - Infrared IP50 80 mA - -
RS-stocknr. 256-449
FabrikantnummerE3JMDS70M4G
FabrikantOmron
€ 114,20
Each
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Block Diffuse 700 mm Relay 5-Terminal Screw 250V 5V - - Infrared IP66 3 A - 30 ms
RS-stocknr. 157-7078
FabrikantnummerE3JMDS70M4TG
FabrikantOmron
€ 126,00
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Block Diffuse 700 mm Relay 5-Terminal Screw 250V 5V - - Infrared IP66 3 A - 30 ms
RS-stocknr. 768-5936
FabrikantnummerE3FADP23
FabrikantOmron
€ 59,90
Each
Aantal stuks
Barrel Diffuse 1 m PNP 4-Pin M12 Connector - 30V - - LED IP67, IP69K 25 mA - 0.5 ms
RS-stocknr. 822-4670
FabrikantnummerEE-SX870A
FabrikantOmron
€ 33,73
Each
Aantal stuks
Fork Through Beam (Fork) Maximum of 5 mm NPN Pre-Wired Cable - 24V - - Infrared IP60 35 mA - -
RS-stocknr. 617-0694
FabrikantnummerE3Z-LL86
FabrikantOmron
€ 197,90
Each
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Block Background Suppression 20 → 300 mm PNP 4-Pin M8 Connector - 26.4V - - LED IP67 100 mA - 1 ms
RS-stocknr. 778-8713
FabrikantnummerE3JK-RR12 2M
FabrikantOmron
€ 76,35
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Block Retroreflective 6 m, 100 mm Relay 5-Wire Cable 2m 240V 240V - Wire Lead LED IP64 - - 20 ms
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FabrikantOmron
€ 23,80
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Fork Through Beam (Fork) Maximum of 5 mm PNP 4-Pin Connector - 24V - Connector Infrared IP50 12 mA - -
RS-stocknr. 372-8155
FabrikantnummerE3ZD622M
FabrikantOmron
€ 97,00
Each
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Block Diffuse 1 m NPN 3-Wire Cable 2m - 26.4V - - Infrared IP69K 100 mA - 1 ms
RS-stocknr. 816-0374
FabrikantnummerE3FCRN21
FabrikantOmron
€ 76,60
Each
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Barrel Retroreflective 0.1 → 4 m NPN M12 Connector - 30V - Cable LED IP67, IP68, IP69K 25 mA - 0.5 ms
RS-stocknr. 157-7062
FabrikantnummerE3JMR4M4TG
FabrikantOmron
€ 126,00
Each
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Block Retroreflective 4 m Relay 5-Terminal Screw 250V 5V - - LED IP66 3 A - 30 ms
RS-stocknr. 374-2066
FabrikantnummerE3ZD86
FabrikantOmron
€ 97,00
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Block Diffuse 5 → 100 mm PNP 4-Pin M8 Connector - 26.4V - - Infrared IP69K 100 mA - 1 ms
RS-stocknr. 821-0000
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€ 201,70
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Block Through Beam (Emitter and Receiver) 7 m PNP M12 Connector - 30V - 4-Pin Connector LED IP67 20 mA - 0.5 ms
RS-stocknr. 615-8256
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€ 197,90
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Block Through Beam (Emitter and Receiver) 60 m PNP 3-Wire Cable 2m - 26.4V - - LED IP67 100 mA - 1 ms