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. 808-9130
Mfr. Part No.CX-412
BrandPanasonic
MYR626.49
Each
units
Block Through Beam (Emitter and Receiver) 15 m NPN 2m Cable - - - 24V - Infrared IP67 100 mA -
RS Stock No. 784-6692
Mfr. Part No.DT50-P1123
BrandSick
MYR1,694.84
Each
units
Block Background Suppression 200 → 10000 mm Analogue 5-Pin M12 Connector - - - 30V - Laser Light IP65 100 mA -
RS Stock No. 125-4525
Mfr. Part No.PM-U25-C3
BrandPanasonic
MYR153.24
Each
units
Fork Through Beam (Fork) 6 mm NPN 3m Cable - - - 24V Cable Infrared IP64 50 mA -
RS Stock No. 542-5145
Mfr. Part No.FPDK 20P 5101 S35A
BrandBaumer
MYR635.93
Each
units
Block Retroreflective 4.5 m PNP 4-Pin M8 Connector - - - 30V - LED IP67 100 mA -
RS Stock No. 847-9426
Mfr. Part No.QS18VP6RQ8
BrandBanner
MYR397.59
Each
units
Barrel Through Beam (Receiver) 20 m PNP 4-Pin Connector - - - 30V - LED IP67 25 mA -
RS Stock No. 818-1738
Mfr. Part No.EE-SX672-WR 1M
BrandOmron
MYR124.32
Each
units
Fork Through Beam (Fork) 5 mm NPN - - - - 24V Pre-Wired Infrared IP50 35 mA -
RS Stock No. 326-7240
Mfr. Part No.E3TSL132M
BrandOmron
MYR625.92
Each
units
Block Retroreflective 5 → 15 mm PNP Pre-Wired Cable - - - 26.4V - LED IP67 50 mA -
RS Stock No. 818-1716
Mfr. Part No.EE-SX675
BrandOmron
MYR117.75
Each
units
Fork Through Beam (Fork) 5 mm NPN 4-Pin Connector - - - 24V Connector Infrared IP50 12 mA -
RS Stock No. 510-3249
Mfr. Part No.RLK29-55/59/116-SET
MYR689.76
Each
units
Block Retroreflective 12 m Relay 6-Terminal Screw - 230V - 230V - LED IP67 2 A -
RS Stock No. 901-2780
Mfr. Part No.CX-422-P-J
BrandPanasonic
MYR653.21
Each
units
Block Diffuse 800 mm PNP M12 Connector - - - 24V - Infrared IP67 - -
RS Stock No. 847-9384
Mfr. Part No.QS18VP6LPQ8
BrandBanner
MYR578.16
Each
units
Barrel Retroreflective 3.5 m PNP 4-Pin M12 Connector - - - 30V - LED IP67 25 mA -
RS Stock No. 219-2397
Mfr. Part No.EE-SPY402 JPN
BrandOmron
MYR271.90
Each
units
Block Retroreflective 5 mm NPN Non-Solder Connector - - - 24V - Infrared IP50 80 mA -
RS Stock No. 815-4170
Mfr. Part No.O300.GR-11110414
BrandBaumer
MYR694.30
Each
units
Block Diffuse 30 → 300 mm Push Pull 4-Pin M8 Connector - - - 30V Cable LED IP67 45 mA -
RS Stock No. 821-0066
Mfr. Part No.E3Z-T81-M1J-1 0.3M
BrandOmron
MYR721.65
Each
units
Block Through Beam (Emitter and Receiver) 15 m PNP Pre-Wired Cable - - - 24V Wire Lead Infrared IP67 35 mA -
RS Stock No. 818-4103
Mfr. Part No.E3Z-T61 2M
BrandOmron
MYR721.65
Each
units
Block Through Beam (Emitter and Receiver) 15 mm NPN Cable - - - 26.4V Pre-Wired LED IP67 100 mA -
RS Stock No. 817-1554
Mfr. Part No.RL31-54/73c/136
MYR483.40
Each
units
Block Retroreflective 9 m Push Pull 4-Pin M12 Connector - - - 30V - LED IP67 100 mA -
RS Stock No. 877-7408
Mfr. Part No.HG-C1100
BrandPanasonic
MYR2,989.57
Each
units
Block Background Suppression 100 mm NPN Cable - - - 24V - Laser Light IP67 - -
RS Stock No. 425-8411
Mfr. Part No.OJ5036
MYR985.00
Each
units
Block Retroreflective 8 m PNP M8 Connector - - - 30V - LED IP67 200 mA -
RS Stock No. 764-3884
Mfr. Part No.S18SP6FF100Q
BrandBanner
MYR1,038.58
Each
units
Barrel Diffuse 0 → 100 mm PNP 4-Pin M12 Connector - - - 30V - Infrared IP69K 150 mA -
RS Stock No. 447-147
Mfr. Part No.GL30-RT/32/40A/98A
MYR1,206.92
Each
units
Fork Through Beam (Fork) 30 mm PNP 3-Pin M8 Connector - - - 30V - LED IP67 100 mA -