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.


...
Read more Read less

Filters

Viewing 1 - 20 of 3521 products
Results per page
Description Price Sensor Style Detection Type Detection Range Output Type Electrical Connection Switching Mode Maximum AC Voltage Communication Protocol Maximum DC Voltage Optical Technology Terminal Type Light Source IP Rating Maximum Current
RS Stock No. 729-5117
BrandRS PRO
kr 792,09
Each
Units
Barrel Retroreflective 50 mm → 7 m PNP 4 Wire Cable 2 m - - - 30V - - LED IP67 100 mA
RS Stock No. 729-5113
BrandRS PRO
kr 792,09
Each
Units
Barrel Retroreflective 50 mm → 7 m PNP M12 4 Pin Connector - - - 30V - - LED IP67 100 mA
RS Stock No. 256-411
BrandRS PRO
kr 1 152,59
Each
Units
Barrel Retroreflective 4 m NPN/PNP M12 Connector - - - 30V - - Infrared IP67 100 mA
RS Stock No. 903-3939
BrandRS PRO
kr 819,16
Each
Units
Fork Through Beam 30 mm NPN NO 4 Wire Cable 2 m - - - 30V - Pre-Wired Infrared IP67 15 mA
RS Stock No. 729-5135
BrandRS PRO
kr 821,25
Each
Units
Block Diffuse 40 mm → 1 m NPN M12 4 Pin Connector - - - 30V - - LED IP67 100 mA
RS Stock No. 285-885
BrandRS PRO
kr 1 884,18
Each
Units
Block Diffuse 700 mm Relay 4 Terminal Screw - 250V - 240V - Screw Infrared LED IP66 2 A
RS Stock No. 729-5101
BrandRS PRO
kr 792,09
Each
Units
Barrel Retroreflective 50 mm → 7 m NPN M12 4 Pin Connector - - - 30V - - LED IP67 100 mA
RS Stock No. 377-8419
BrandRS PRO
kr 3 142,66
Each
Units
Fork Through Beam 2 mm PNP 4 Wire Cable 2 m - - - 30V - - LED IP67 100 mA
RS Stock No. 204-3987
BrandRS PRO
kr 436,49
Each
Units
Barrel Retroreflective 3 m PNP NO/NC M12 Connector - - - 30V - M12 Connector Yellow LED IP67 -
RS Stock No. 202-4471
BrandRS PRO
kr 589,81
Each
Units
Block Background Suppression 100 mm PNP NO/NC M12 connector - - - - - M12 Connector - - -
RS Stock No. 204-3961
BrandRS PRO
kr 496,50
Each
Units
Barrel Diffuse 150 mm NPN NO Cable 2 m - - - 30V - Cable 2 m Yellow LED IP67 -
RS Stock No. 204-3988
BrandRS PRO
kr 396,58
Each
Units
Barrel Retroreflective 3 m PNP NO M12 Connector - - - 30V - M12 Connector Yellow LED IP67 -
RS Stock No. 204-3997
BrandRS PRO
kr 214,75
Each
Units
Barrel Through Beam 20 m NPN NO/NC Cable 2 m - - - 30V - Cable 2 m LED IP67 -
RS Stock No. 204-3998
BrandRS PRO
kr 321,67
Each
Units
Barrel Through Beam 20 m NPN NO/NC Cable 2 m - - - 30V - Cable 2 m LED IP67 -
RS Stock No. 202-4441
BrandRS PRO
kr 324,26
Each
Units
Block Through Beam 10 m NPN NO/NC Cable 2 m - - - - - Cable 2 m - - -
RS Stock No. 202-4427
BrandRS PRO
kr 565,06
Each
Units
Block Diffuse 1 m PNP M8 Connector - - - - - M8 Connector - - -
RS Stock No. 204-3971
BrandRS PRO
kr 476,41
Each
Units
Barrel Diffuse 400 mm PNP NO/NC M12 Connector - - - 30V - M12 Connector Yellow LED IP67 -
RS Stock No. 202-4434
BrandRS PRO
kr 515,55
Each
Units
Block Diffuse 300 mm NPN NO/NC M8 Connector - - - - - M8 Connector - - -
RS Stock No. 729-5090
BrandRS PRO
kr 773,61
Each
Units
Barrel Background Suppression 1 mm → 140 mm NPN M12 4 Pin Connector - - - 30V - - LED IP67 100 mA
RS Stock No. 204-3968
BrandRS PRO
kr 456,58
Each
Units
Barrel Diffuse 400 mm NPN NO/NC Cable 2 m - - - 30V - Cable 2 m Yellow LED IP67 -