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. 444-3619
Mfr. Part No.XUX0ARCTT16
$350.34
Each
units
Block Diffuse, Retro-Reflective, Through Beam (Receiver) 1.3 m, 2 m, 11 m, 40 m Relay Screw Clamp - 240V - 240V - Infrared IP65, IP67 3 A, 500 mA -
RS Stock No. 444-3445
Mfr. Part No.XUB0BPSNL2
$242.86
Each
units
Barrel Multimode 0.12 m, 0.3 m, 2 m, 15 m PNP 3-Wire Cable 2m - - - 24V - Infrared IP65, IP67 100 mA -
RS Stock No. 512-4656
Mfr. Part No.XUK9ARCNL2
$236.28
Each
units
Compact Retroreflective 5 m Relay 5-Wire Cable 2m - 240V - 240V - LED IP65 3 A -
RS Stock No. 394-8999
Mfr. Part No.XUK8AKSNM12
$265.03
Each
units
Compact Diffuse 1 m NPN/PNP 4-Pin M12 Connector - - - 24V - Infrared IP30, IP65 100 mA -
RS Stock No. 512-4640
Mfr. Part No.XUK1ARCNL2
$280.22
Each
units
Compact Retro-Reflective 7 m Relay Cable - 240V - 240V - Infrared IP65 3 A -
RS Stock No. 444-3625
Mfr. Part No.XUX0ARCTT16T
$366.34
Each
units
Block Through Beam (Emitter) 40 m - 3-Terminal Screw - 240V - 240V - Infrared IP65, IP67 3 A, 500 mA -
RS Stock No. 695-6817
Mfr. Part No.XUB4APANL2
$114.67
Each
units
Barrel Diffuse 0.1 m PNP 2/5-Wire Cable 2m - - - 24V - Infrared IP65, IP67 100 mA -
RS Stock No. 662-6241
Mfr. Part No.XUM0ANSAL2
$213.90
Each
units
Block Multimode 0.1 m, 0.4 m, 3 m, 10 m NPN 3-Wire Cable 2m - - - 24V - Infrared IP65, IP67 100 mA -
RS Stock No. 455-4999
Mfr. Part No.XUK0ARCTL2T
$114.40
Each
units
Compact Through Beam (Emitter) 30 m - 3-Wire Cable 2m - 240V - 240V - Infrared IP65 3 A -
RS Stock No. 198-756
Mfr. Part No.XUB1BPBNL2
$120.02
Each
units
Barrel Retroreflective 4 m PNP Cable - - - 24V - Infrared IP65, IP67 100 mA -
RS Stock No. 609-0784
Mfr. Part No.XUB5APANM12
$151.98
Each
units
Barrel Diffuse 0.6 m PNP 4-Pin M12 Connector - - - 24V - Infrared IP65, IP67 100 mA -
RS Stock No. 695-6801
Mfr. Part No.XUB1APANM12
$114.67
Each
units
Barrel Retroreflective 4 m PNP 4-Pin M12 Connector - - - 24V - Infrared IP65, IP67 100 mA -
RS Stock No. 444-3401
Mfr. Part No.XUB0APSNM12
$271.50
Each
units
Barrel Diffuse, Retro-Reflective, Through Beam (Receiver) 0.12 m, 0.3 m, 2 m, 15 m PNP 4-Pin M12 Connector - - - 24V - Infrared IP65, IP67 100 mA -
RS Stock No. 752-5253
Mfr. Part No.XUBLAPCNL2
$783.88
Each
units
Barrel Through Beam (Emitter and Receiver) 100 m PNP Cable - - - 24V - Laser Light IP67 100 mA -
RS Stock No. 444-3423
Mfr. Part No.XUB0AKSNM12T
$96.92
Each
units
Barrel Through Beam (Emitter) 15 m - 4-Pin M12 Connector - - - 24V - Infrared IP65, IP67 100 mA -
RS Stock No. 695-6845
Mfr. Part No.XUX5ARCNT16
$269.06
Each
units
Block Diffuse 2.1 m Relay 5-Terminal Screw - 240V - 240V - Infrared IP65, IP67 3 A, 500 mA -
RS Stock No. 763-9368
Mfr. Part No.XUMTANCNL2
$286.94
Each
units
Block Retroreflective 1 m NPN Cable - - - 24V - Infrared IP67 100 mA -
RS Stock No. 845-3459
Mfr. Part No.XUBLAKCNM12T
$397.82
Each
units
Barrel Through Beam (Emitter) 0 → 30 m - - - - - 30V - Laser Light IP67 25 mA -
RS Stock No. 444-3502
Mfr. Part No.XUM0AKSAL2T
$203.30
Each
units
Block Through Beam (Emitter) 10 m Relay 3-Wire Cable 2m - - - 24V - Infrared IP65, IP67 100 mA -
RS Stock No. 752-5051
Mfr. Part No.XUB5BNANM12
$150.88
Each
units
Barrel Diffuse 0.6 m NPN 4-Pin M12 Connector - - - 24V - Infrared IP65, IP67 100 mA -