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 781-5979
Référence fabricantML300-55-2M-RT/59/98/103
77,81 €
Each
Unité
Block Retroreflective 0 → 2 m PNP 3-Pin M8 Connector - - 30V - - LED IP65 100 mA -
N° de stock RS 780-0028
Référence fabricantOBR1000-R2-E0
96,43 €
Each
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Block Retroreflective 0 → 1 m NPN - - - 30V - Cable LED IP67 50 mA -
N° de stock RS 510-3255
Référence fabricantRLK29-55/25/116-SET
108,38 €
Each
Unité
Block Retroreflective 12 m Relay 6-Terminal Screw 230V - 230V - - LED IP67 2 A -
N° de stock RS 714-1625
Référence fabricantML100-55/95/103
76,35 €
Each
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Block Retroreflective 5 m PNP 4-Pin M8 Connector - - 30V - - LED IP67 100 mA -
N° de stock RS 124-0324
Référence fabricantOBT350-R100-2EP-IO-V31-1T
95,85 €
Each
Unité
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
N° de stock RS 447-159
Référence fabricantGL10-RT/32/40A/98A
206,76 €
Each
Unité
Fork Through Beam (Fork) 10 mm PNP 3-Pin M8 Connector - - 30V - - LED IP67 200 mA -
N° de stock RS 124-0323
Référence fabricantOBT350-R100-2EP-IO-V31
95,85 €
Each
Unité
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
N° de stock RS 124-0317
Référence fabricantOBE12M-R100-S2EP-IO-V31
83,60 €
Each
Unité
Block Through Beam (Emitter and Receiver) 0 → 12 m NPN/PNP 4-Pin M8 Connector - IO-LINK 30V - 4-Pin Connector LED IP67, IP69, IP69K 100 mA IO-Link
N° de stock RS 510-3328
Référence fabricantVL18-54-MS/40A/118/128
123,39 €
Each
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Barrel Retroreflective 3.5 m Push Pull 4-Pin M12 Connector - - 30V - - LED IP67 200 mA -
N° de stock RS 229-096
Référence fabricantGLV18-55/73/120
53,72 €
Each
Unité
Barrel Retroreflective 4 m PNP 4-Pin M12 Connector - - 30V - - LED IP67 100 mA -
N° de stock RS 714-1622
Référence fabricantML100-55/103/115
76,35 €
Each
Unité
Block Retroreflective 5 m PNP 3-Wire Cable 2m - - 30V - - LED IP67 100 mA -
N° de stock RS 714-1647
Référence fabricantML100-8-1000-RT/103/115
75,23 €
Each
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Block Diffuse 1 m PNP 3-Wire Cable 2m - - 30V - - LED IP67 100 mA -
N° de stock RS 891-9514
Référence fabricantRLK31-8-2500-IR/31/115
65,09 €
Each
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Block Diffuse 0 → 2500 mm Relay 5-Wire Cable 2m 240V - 240V - - Infrared IP67 40 mA -
N° de stock RS 714-1644
Référence fabricantML100-8-H-350-RT/95/103
109,78 €
Each
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Block Diffuse 5 → 350 mm PNP 4-Pin M8 Connector - - 30V - - LED IP67 100 mA -
N° de stock RS 403-973
Référence fabricantGLV18-6-S/73/120
53,72 €
Each
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Barrel Retroreflective 5.5 m PNP 4-Pin M12 Connector - - 30V - - LED IP67 100 mA -
N° de stock RS 403-957
Référence fabricantGLV18-55-S/115/120
54,95 €
Each
Unité
Barrel Retroreflective 3.5 m PNP Cable - - 30V - - LED IP67 100 mA -
N° de stock RS 124-0339
Référence fabricantOQT150-R101-2EP-IO-V31-L
162,74 €
Each
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Block Background Suppression 8 → 150 mm NPN/PNP 4-Pin M8 Connector - IO-LINK 30V - 4-Pin Connector Laser Light IP67, IP69, IP69K 100 mA IO-Link
N° de stock RS 404-067
Référence fabricantGLV18-55/59/102/159
54,95 €
Each
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Barrel Retroreflective 4 m NPN 3-Pin M12 Connector - - 30V - - LED IP67 100 mA -
N° de stock RS 714-1634
Référence fabricantML100-8-1000-RT/95/103
75,23 €
Each
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Block Diffuse 1 m PNP 4-Pin M8 Connector - - 30V - - LED IP67 100 mA -
N° de stock RS 714-1656
Référence fabricantML100-8-H-350-RT/103/115
109,78 €
Each
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Block Diffuse 5 → 350 mm PNP 3-Wire Cable 2m - - 30V - - LED IP67 100 mA -