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. 729-5107
FabrikantRS PRO
€ 68,57
Each
Aantal stuks
Barrel Background Suppression 1 → 140 mm PNP 4-Wire Cable 2m - - 30V - - LED IP67 100 mA -
RS-stocknr. 786-5851
FabrikantnummerWL260-S270
FabrikantSick
€ 158,08
Each
Aantal stuks
Block Retroreflective 0.01 → 15 m Relay 5-Terminal Screw 240V - 240V - - LED IP67 3 A -
RS-stocknr. 360-0451
FabrikantnummerWT24-2R210
FabrikantSick
€ 339,00
Each
Aantal stuks
- - - Relay - - - - - - LED IP69 - -
RS-stocknr. 919-6582
FabrikantnummerWTB2S-2P3251
FabrikantSick
€ 131,04
Each
Aantal stuks
Block Background Suppression 1 → 150 mm PNP 4-Pin M8 Connector - - 30V - M8 LED IP67 20 mA -
RS-stocknr. 627-6556
FabrikantnummerOPB704W-Z
FabrikantOptek
€ 3,29
Each
Aantal stuks
Block Retroreflective 3.8 mm NPN 4-Wire Cable 0.61m - - - - - Infrared - - -
RS-stocknr. 493-7322
FabrikantnummerWF15-40B410
FabrikantSick
€ 185,12
Each
Aantal stuks
Fork Through Beam (Fork) 15 mm NPN/PNP 4-Pin M8 Connector - - 30V - - Infrared IP65 100 mA -
RS-stocknr. 121-2722
FabrikantnummerWTB11-2P2461
FabrikantSick
€ 130,00
Each
Aantal stuks
Block Background Suppression 30 → 1100 mm PNP 4-Pin M12 Connector - - 30V - M12 LED IP66, IP67, IP69K 30 mA -
RS-stocknr. 891-9472
FabrikantnummerGLV18-8-450/25/102/115
FabrikantPepperl + Fuchs
€ 54,85
Each
Aantal stuks
Block Diffuse 0 → 450 mm NPN Cable - - 30V - - LED IP67 <20 mA -
RS-stocknr. 847-9441
FabrikantnummerQS30AF600Q
FabrikantBanner
€ 228,42
Each
Aantal stuks
Barrel Diffuse 30 → 600 mm NPN/PNP 5-Pin M12 Connector - - 30V - - LED IP67 <40 mA @ 30 V dc, <80 mA @ 10 V dc -
RS-stocknr. 842-8560
FabrikantnummerWTB2S-2P3130
FabrikantSick
€ 120,64
Each
Aantal stuks
Block Background Suppression 1 → 36 mm PNP 3-Pin M8 Connector 0.2m Cable - - 30V - M8 LED IP67 20 mA -
RS-stocknr. 784-6692
FabrikantnummerDT50-P1123
FabrikantSick
€ 359,00
Each
Aantal stuks
Block Background Suppression 200 → 10000 mm Analogue 5-Pin M12 Connector - - 30V - - Laser Light IP65 100 mA -
RS-stocknr. 256-449
FabrikantnummerE3JMDS70M4G
FabrikantOmron
€ 116,00
Each
Aantal stuks
Block Diffuse 700 mm Relay 5-Terminal Screw 250V - 5V - - Infrared IP66 3 A -
RS-stocknr. 219-033
FabrikantnummerDT20-P254B
FabrikantSick
€ 730,00
Each
Aantal stuks
Block Background Suppression 50 → 150 mm PNP 5-Pin M12 Connector - - 30V - - Laser Light IP65 100 mA -
RS-stocknr. 786-5911
FabrikantnummerWL150-P420
FabrikantSick
€ 131,04
Each
Aantal stuks
Block Retroreflective 0.01 → 0.7 m PNP 4-Pin M8 Connector - - 30V - - LED IP67 100 mA -
RS-stocknr. 742-0798
FabrikantnummerXUVE04M3KSNM8
€ 130,00
Each
Aantal stuks
Fork Through Beam 3 mm NPN/PNP 4-Pin M8 Connector - - 24V - - Infrared IP65 100 mA -
RS-stocknr. 418-5284
FabrikantnummerBGL 80 A-001-S49
FabrikantBALLUFF
€ 163,86
Each
Aantal stuks
Fork Through Beam (Fork) 80 mm PNP 3-Pin M8 Connector - - 30V - - LED IP67 200 mA -
RS-stocknr. 431-2010
FabrikantnummerEQ34PN
FabrikantPanasonic
€ 173,01
Each
Aantal stuks
Block Retroreflective 0.1 → 2 m PNP 3-Wire Cable 2m - - 30V - - Infrared IP67 100 mA -
RS-stocknr. 399-1959
FabrikantnummerFPDK14P5101/S35A
FabrikantBaumer
€ 79,80
Each
Aantal stuks
Block Retroreflective 7.2 m PNP 4-Pin M8 Connector - - 30V - - LED IP67 100 mA -
RS-stocknr. 822-4670
FabrikantnummerEE-SX870A
FabrikantOmron
€ 37,15
Each
Aantal stuks
Fork Through Beam (Fork) Maximum of 5 mm NPN Pre-Wired Cable - - 24V - - Infrared IP60 35 mA -
RS-stocknr. 480-4985
FabrikantnummerEQ501
FabrikantPanasonic
€ 168,05
Each
Aantal stuks
Block Diffuse 0.1 → 2.5 m Relay 4-Terminal Screw 250V - 30V - Screw Infrared IP67 3 A -
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