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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Description Prix 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
N° de stock RS 512-4640
Référence fabricantXUK1ARCNL2
91,50 €
Each
Unité
Compact Retroreflective 7 m Relay 5-Wire Cable 2m 240V - 240V - - Infrared IP65 3 A -
N° de stock RS 729-5151
MarqueRS PRO
89,71 €
Each
Unité
Block Retroreflective 0.15 → 10 m PNP 4-Wire Cable 2m - - 30V - - LED IP67 100 mA -
N° de stock RS 878-7948
Référence fabricantXUK1ARCNL2H60
114,00 €
Each
Unité
Compact Retroreflective Maximum of 10 m Relay 5-Wire Cable 2m 240V - 240V - Cable LED IP65 3 A -
N° de stock RS 444-3619
Référence fabricantXUX0ARCTT16
188,00 €
Each
Unité
Block Multimode 1.3 m, 2 m, 11 m, 40 m Relay 5-Terminal Screw 240V - 240V - - Infrared IP65, IP67 3 A, 500 mA -
N° de stock RS 444-3530
Référence fabricantXUK0AKSAM12
115,00 €
Each
Unité
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 -
N° de stock RS 498-1795
Référence fabricantFHDK 10P5101
MarqueBaumer
160,00 €
Each
Unité
Block Diffuse 20 → 120 mm PNP 4-Wire Cable 2m - - 30V - - LED IP65 100 mA -
N° de stock RS 455-4983
Référence fabricantXUK0ARCTL2
134,00 €
Each
Unité
Compact Multimode 0.28 m, 0.8 m, 4 m, 30 m Relay 5-Wire Cable 2m 240V - 240V - - Infrared IP65 3 A -
N° de stock RS 768-9473
Référence fabricantWTB9-3P2461
MarqueSick
160,16 €
Each
Unité
Block Background Suppression 20 → 350 mm NPN/PNP 4-Pin M12 Connector - - 30V - - LED IP66, IP67, IP69K 100 mA -
N° de stock RS 816-0374
Référence fabricantE3FCRN21
MarqueOmron
77,75 €
Each
Unité
Barrel Retroreflective 0.1 → 4 m NPN M12 Connector - - 30V - Cable LED IP67, IP68, IP69K 25 mA -
N° de stock RS 908-7163
Référence fabricantOPB829DZ
MarqueOptek
3,76 €
Each
Unité
Block Through Beam (Fork) 3.18 → 8 mm Phototransistor Wire - - 1.7V - Wire Lead LED - 50 mA -
N° de stock RS 842-8541
Référence fabricantGL10-P4212
MarqueSick
83,72 €
Each
Unité
Block Retroreflective 0.08 → 15 m PNP M12 Connector - - 30V - M12 LED IP67 20 mA -
N° de stock RS 739-6673
Référence fabricantO1D100
312,59 €
Each
Unité
Block Diffuse 0.2 → 10 m PNP M12 Connector - - 30V - - Laser Light IP67 200 mA -
N° de stock RS 444-3552
Référence fabricantXUK0AKSAM12T
56,00 €
Each
Unité
Compact Through Beam (Emitter) 30 m - 4-Pin M12 Connector - - 24V - - Infrared IP65 100 mA -
N° de stock RS 786-5920
Référence fabricantWTB4-3P2261
MarqueSick
159,12 €
Each
Unité
Block Background Suppression 4 → 150 mm PNP 4-Pin M8 Connector - - 30V - - LED IP66, IP67 100 mA -
N° de stock RS 807-4551
Référence fabricantEE-SX1103
MarqueOmron
1,67 €
Each
Unité
Block Diffuse - - - 1.6V - - - PCB Pin - - 50 mA -
N° de stock RS 288-9805
Référence fabricantWT150-P460
MarqueSick
145,60 €
Each
Unité
Block Diffuse 2 → 100 mm PNP 4-Pin M8 Connector - - 30V - - LED IP67 100 mA -
N° de stock RS 753-0283
Référence fabricantXUK2ARCNL2T
56,00 €
Each
Unité
Compact Through Beam (Emitter) 30 m Solid State 2-Wire Cable 2m 240V - 240V - - Infrared IP65 3 A -
N° de stock RS 842-8566
Référence fabricantWTB2S-2P3110
MarqueSick
120,64 €
Each
Unité
Block Background Suppression 1 → 18 mm PNP 3-Pin M8 Connector 0.2m Cable - - 30V - M8 LED IP67 20 mA -
N° de stock RS 256-449
Référence fabricantE3JMDS70M4G
MarqueOmron
116,00 €
Each
Unité
Block Diffuse 700 mm Relay 5-Terminal Screw 250V - 5V - - Infrared IP66 3 A -
N° de stock RS 842-8548
Référence fabricantGL10G-P4252
MarqueSick
95,16 €
Each
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Block Retroreflective 0.15 → 12 m PNP M12 Connector - - 30V - M12 LED IP67 20 mA -