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.RS Components offer an extensive selection of photoelectric sensors for use various industrial applications. Our high-quality products are supplied from leading brands including Omron, Sick, Pepperl + Fuchs Telemecanique Sensors Baumer, Banner and of course RS PRO.

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 can detect 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 must 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 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.


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Description Price Sensor Style Detection Type Detection Range Output Type Electrical Connection Switching Mode Maximum AC Voltage Communication Protocol Maximum DC Voltage Terminal Type Light Source IP Rating Maximum Current Interface
New
RS Stock No. 211-8511
Mfr. Part No.XUYAFV946S
MYR942.52
Each
units
- LED 2000 mm Solid state Cable - - - - - - - - -
New
RS Stock No. 212-4870
Mfr. Part No.XUYFNEP60005
MYR863.54
Each
units
Fork Through Beam W x D (5 X 59) mm PNP and NPN 1 male connector M8, 4 pins - - - - - - - - -
New
RS Stock No. 211-8514
Mfr. Part No.XUYFANEP100005
MYR1,042.57
Each
units
Fork Thru beam 5 mm Solid state 1 male connector M8, 4 pins - - - - - - - - -
New
RS Stock No. 216-4845
Mfr. Part No.XUYPS989SP
MYR673.98
Each
units
Miniature Through Beam 4 M PNP Cable - - - - - - - - -
New
RS Stock No. 211-8513
Mfr. Part No.XUYF953002COS
MYR1,237.39
Each
units
Block Thru beam 2 mm Solid state 1 male connector M8, 4 pins - - - - - - - - -
New
RS Stock No. 212-4871
Mfr. Part No.XUYPS1LCO965S
MYR3,027.65
Each
units
Compact Through Beam 50 → 300 mm PNP and NPN 1 male connector M8, 4 pins - - - - - - - - -
New
RS Stock No. 211-8515
Mfr. Part No.XUYPCO925L2ANSP
MYR4,586.24
Each
units
Compact Diffuse 85 mm - 1 male connector M12, 4 pins - - - - - - - - -
New
RS Stock No. 212-4869
Mfr. Part No.XUYAFP946S
MYR1,077.66
Each
units
- Through Beam - PNP and NPN Cable - - - - - - - - -
New
RS Stock No. 211-8512
Mfr. Part No.XUYBCO989SP
MYR626.59
Each
units
Miniature LED, Pulsed 1000 mm Solid state 1 male connector M8, 4 pins - - - - - - - - -