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
RS Stock No. 179-5316
Mfr. Part No.SA1E-PP1-2M
BrandIdec
TWD1,918.00
Each
units
Block Retroreflective 1.3 → 5 m PNP Cable - - - 30V - LED IP67 30 mA -
RS Stock No. 179-5317
Mfr. Part No.SA1E-PP1C
BrandIdec
TWD1,918.00
Each
units
Block Retroreflective 1.3 → 5 m PNP 4-Pin M8 Connector - - - 30V - LED IP67 30 mA -
RS Stock No. 179-5337
Mfr. Part No.SA1U-P07MW
BrandIdec
TWD2,428.00
Each
units
Block Retroreflective 7 m NPN/PNP 5-Terminal Screw - - - 30V Spring Up LED IP67 100 mA -
RS Stock No. 179-5320
Mfr. Part No.SA1E-TN1-2M
BrandIdec
TWD1,662.00
Each
units
Block Through Beam 20 m NPN Cable - - - 30V - Infrared IP67 15 mA -
RS Stock No. 179-5341
Mfr. Part No.SA1U-T50MW
BrandIdec
TWD3,138.00
Each
units
Block Through Beam 50 m NPN/PNP 5-Terminal Screw - - - 30V Spring Up Infrared IP67 100 mA -
RS Stock No. 179-5305
Mfr. Part No.SA1E-GP1C
BrandIdec
TWD2,754.00
Each
units
Block Convergent 5 → 35 mm PNP 3-Pin M8 Connector - - - 30V 4-Pin Connector LED IP67 30 mA -
RS Stock No. 179-5318
Mfr. Part No.SA1E-PP2-2M
BrandIdec
TWD1,918.00
Each
units
Block Retroreflective 1.3 → 5 m PNP Cable - - - 30V - LED IP67 30 mA -
RS Stock No. 179-5338
Mfr. Part No.SA1U-P07MWT
BrandIdec
TWD2,710.00
Each
units
Block Retroreflective 7 m NPN/PNP 5-Terminal Screw - - - 30V Spring Up LED IP67 100 mA -
RS Stock No. 179-5327
Mfr. Part No.SA1U-B02M
BrandIdec
TWD2,913.00
Each
units
Block Background Suppression 2 m Relay 5-Terminal Screw - 250V - 30V Spring Up Infrared IP67 3 A -
RS Stock No. 179-5331
Mfr. Part No.SA1U-D01M
BrandIdec
TWD3,267.00
Each
units
Block Diffuse 1 m Relay 5-Terminal Screw - 250V - 30V Spring Up Infrared IP67 3 A -
RS Stock No. 179-5328
Mfr. Part No.SA1U-B02MT
BrandIdec
TWD3,097.00
Each
units
Block Background Suppression 2 m Relay 5-Terminal Screw - 250V - 30V Spring Up Infrared IP67 3 A -
RS Stock No. 179-5303
Mfr. Part No.SA1E-DP1C
BrandIdec
TWD1,918.00
Each
units
Block Diffuse 700 mm PNP 4-Pin M8 Connector - - - 30V - Infrared IP67 30 mA -
RS Stock No. 179-5321
Mfr. Part No.SA1E-TP1-2M
BrandIdec
TWD2,079.00
Each
units
Block Through Beam 20 m PNP Cable - - - 30V - Infrared IP67 15 mA -
RS Stock No. 179-5324
Mfr. Part No.SA1E-TP2C
BrandIdec
TWD2,079.00
Each
units
Block Through Beam 20 m PNP 4-Pin M8 Connector - - - 30V - Infrared IP67 15 mA -
RS Stock No. 179-5333
Mfr. Part No.SA1U-D01MW
BrandIdec
TWD2,286.00
Each
units
Block Diffuse 1 m NPN/PNP 5-Terminal Screw - - - 30V Spring Up Infrared IP67 100 mA -
RS Stock No. 179-5323
Mfr. Part No.SA1E-TP2-2M
BrandIdec
TWD2,079.00
Each
units
Block Through Beam 20 m PNP Cable - - - 30V - Infrared IP67 15 mA -
RS Stock No. 179-5342
Mfr. Part No.SA1U-T50MWT
BrandIdec
TWD3,293.00
Each
units
Block Through Beam 50 m NPN/PNP 5-Terminal Screw - - - 30V Spring Up Infrared IP67 100 mA -
RS Stock No. 179-5311
Mfr. Part No.SA1E-LTP3C
BrandIdec
TWD5,268.00
Each
units
Block Through Beam 30 m PNP 4-Pin M8 Connector - - - 30V - - IP67 15 mA -
RS Stock No. 179-5300
Mfr. Part No.SA1E-BP1C
BrandIdec
TWD2,581.00
Each
units
Block Background Suppression 20 → 200 mm PNP 4-Pin M8 Connector - - - 30V - LED IP67 30 mA -
RS Stock No. 179-5313
Mfr. Part No.SA1E-NP1C
BrandIdec
TWD1,918.00
Each
units
Block Retroreflective 50 → 150 mm PNP 4-Pin M8 Connector - - - 30V - LED IP67 30 mA -