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. 204-3987
BrandRS PRO
MYR200.73
Each
units
Barrel Retro Reflection 3 m PNP NO/NC M12 Connector - - - 30V M12 Yellow LED IP67 - -
New
RS Stock No. 204-3974
BrandRS PRO
MYR228.33
Each
units
Barrel Diffuse Reflection 400 mm NPN NO/NC M12 Connector - - - 30V M12 Yellow LED IP67 - -
New
RS Stock No. 202-4473
BrandRS PRO
MYR316.83
Each
units
Block Diffuse Reflection 2 m PNP+NPN M12 connector - - - - M12 - - - -
New
RS Stock No. 204-4009
BrandRS PRO
MYR159.13
Each
units
Barrel Through Beam (Receiver) 20 m PNP NO/NC 2m PVC Cable - - - 30V 2 m cable LED IP67 - -
RS Stock No. 729-5139
BrandRS PRO
MYR450.05
Each
units
Block Diffuse 40 → 1000 mm NPN Cable - - - 30V - LED IP67 100 mA -
New
RS Stock No. 202-5447
BrandRS PRO
MYR841.13
Each
units
Block Background Suppression 0 → 2 m PNP+NPN M12 Connector - - - - M12 Red LED IP67 - -
New
RS Stock No. 204-3965
BrandRS PRO
MYR228.33
Each
units
Barrel Diffuse Reflection 150 mm PNP NO M12 Connector - - - 30V M12 Yellow LED IP67 - -
RS Stock No. 729-5157
BrandRS PRO
MYR467.66
Each
units
Block Retroreflective 0.15 → 10 m PNP 4-Pin M12 Connector - - - 30V - LED IP67 100 mA -
New
RS Stock No. 204-3970
BrandRS PRO
MYR219.09
Each
units
Barrel Diffuse Reflection 400 mm NPN NO/NC M12 Connector - - - 30V M12 Yellow LED IP67 - -
New
RS Stock No. 202-4447
BrandRS PRO
MYR103.88
Each
units
Block Through Beam (Emitter) 10 m - M8 connector - - - - M8 - - - -
New
RS Stock No. 202-4463
BrandRS PRO
MYR162.65
Each
units
Block Through Beam (Receiver) 20 m NPN NO/NC 2m PVC cable - - - - 2 m cable - - - -
New
RS Stock No. 202-4450
BrandRS PRO
MYR271.24
Each
units
Block Background Suppression 350 mm PNP NO/NC 2m PVC cable - - - - 2 m cable - - - -
New
RS Stock No. 202-5451
BrandRS PRO
MYR362.43
Each
units
Block Diffuse 0 → 2 m Relay NO/NC Terminal Block - - - - Terminal Infrared LED IP67 - -
New
RS Stock No. 204-3991
BrandRS PRO
MYR126.05
Each
units
Barrel Through Beam (Receiver) 5 m NPN NO 2m PVC Cable - - - 30V 2 m cable LED IP67 - -
New
RS Stock No. 202-4424
BrandRS PRO
MYR248.47
Each
units
Block Diffuse Reflection 1 m NPN 2m PVC cable - - - - 2 m cable - - - -
New
RS Stock No. 204-3967
BrandRS PRO
MYR237.63
Each
units
Barrel Diffuse Reflection 150 mm PNP NO 2m PVC Cable - - - 30V 2 m cable Yellow LED IP67 - -
New
RS Stock No. 202-4483
BrandRS PRO
MYR231.13
Each
units
Block Through Beam Reflection 60 m Relay NO/NC 2m PVC cable - - - - 2 m cable - - - -
New
RS Stock No. 202-4456
BrandRS PRO
MYR237.09
Each
units
Block Diffuse Reflection 300 mm PNP NO/NC M12 connector - - - - M12 - - - -
New
RS Stock No. 204-3994
BrandRS PRO
MYR83.92
Each
units
Barrel Through Beam (Emitter) 10 m NPN NO+NC 2m PVC Cable - - - 30V 2 m cable LED IP67 - -
New
RS Stock No. 204-3995
BrandRS PRO
MYR137.02
Each
units
Barrel Through Beam (Receiver) 10 m NPN NO/NC 2m PVC Cable - - - 30V 2 m cable LED IP67 - -