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.

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 are capable of detecting 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 has to 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 back 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. A diffuse mode sensor with background suppression is less sensitive to the target colour. They can also use a visible red light or infrared light sources.


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Omschrijving Prijs Sensor Style Detection Type Detection Range Output Type Electrical Connection Maximum AC Voltage Communication Protocol Maximum DC Voltage Optical Technology Terminal Type Light Source IP Rating Maximum Current Interface
Nieuw
RS-stocknr. 202-4427
FabrikantRS PRO
49,27 €
Each
Aantal stuks
Block Diffuse Reflection 1 m PNP M8 connector - - - - M8 - - - -
Nieuw
RS-stocknr. 202-4434
FabrikantRS PRO
44,95 €
Each
Aantal stuks
Block Diffuse Reflection 300 mm NPN NO/NC M8 connector - - - - M8 - - - -
Nieuw
RS-stocknr. 202-4477
FabrikantRS PRO
60,07 €
Each
Aantal stuks
Block Polarized Retro Reflection 5 m PNP+NPN 2m PVC cable - - - - 2 m cable - - - -
Nieuw
RS-stocknr. 204-3996
FabrikantRS PRO
25,98 €
Each
Aantal stuks
Barrel Through Beam (Receiver) 10 m PNP NO/NC 2m PVC Cable - - 30V - 2 m cable LED IP67 - -
Nieuw
RS-stocknr. 204-3973
FabrikantRS PRO
38,06 €
Each
Aantal stuks
Barrel Diffuse Reflection 400 mm PNP NO/NC 2m PVC Cable - - 30V - 2 m cable Yellow LED IP67 - -
Nieuw
RS-stocknr. 204-3966
FabrikantRS PRO
45,05 €
Each
Aantal stuks
Barrel Diffuse Reflection 150 mm NPN NO 2m PVC Cable - - 30V - 2 m cable Yellow LED IP67 - -
Nieuw
RS-stocknr. 204-3969
FabrikantRS PRO
39,81 €
Each
Aantal stuks
Barrel Diffuse Reflection 400 mm PNP NO/NC 2m PVC Cable - - 30V - 2 m cable Yellow LED IP67 - -
Nieuw
RS-stocknr. 202-4457
FabrikantRS PRO
47,11 €
Each
Aantal stuks
Block Polarized Retro Reflection 3 m NPN NO/NC 2m PVC cable - - - - 2 m cable - - - -
Nieuw
RS-stocknr. 204-3999
FabrikantRS PRO
28,05 €
Each
Aantal stuks
Barrel Through Beam (Emitter) 20 m PNP NO/NC 2m PVC Cable - - 30V - 2 m cable LED IP67 - -
RS-stocknr. 729-5141
FabrikantRS PRO
82,38 €
Each
Aantal stuks
Block Diffuse 40 mm → 1 m PNP Cable - - 30V - - LED IP67 100 mA -
Nieuw
RS-stocknr. 204-4010
FabrikantRS PRO
19,41 €
Each
Aantal stuks
Barrel Through Beam (Emitter) 20 m NPN NO+NC 2m PVC Cable - - 30V - 2 m cable LED IP67 - -
Nieuw
RS-stocknr. 204-4012
FabrikantRS PRO
29,12 €
Each
Aantal stuks
Barrel Through Beam (Receiver) 20 m PNP NO/NC 2m PVC Cable - - 30V - 2 m cable LED IP67 - -
Nieuw
RS-stocknr. 202-5459
FabrikantRS PRO
81,69 €
Each
Aantal stuks
Block Polarised Retro Reflection 12 m Relay NO/NC Terminal Block 240V - 240V - Terminal Red LED IP67 - -
Nieuw
RS-stocknr. 202-5451
FabrikantRS PRO
68,72 €
Each
Aantal stuks
Block Diffuse 0 → 2 m Relay NO/NC Terminal Block - - - - Terminal Infrared LED IP67 - -
Nieuw
RS-stocknr. 202-4432
FabrikantRS PRO
38,47 €
Each
Aantal stuks
Block Diffuse Reflection 100 mm PNP M8 connector - - - - M8 - - - -
Nieuw
RS-stocknr. 204-3965
FabrikantRS PRO
43,29 €
Each
Aantal stuks
Barrel Diffuse Reflection 150 mm PNP NO M12 Connector - - 30V - M12 Yellow LED IP67 - -
Nieuw
RS-stocknr. 202-4464
FabrikantRS PRO
30,84 €
Each
Aantal stuks
Block Through Beam (Receiver) 20 m NPN NO/NC M12 connector - - - - M12 - - - -
Nieuw
RS-stocknr. 202-4465
FabrikantRS PRO
30,84 €
Each
Aantal stuks
Block Through Beam (Receiver) 20 m PNP NO/NC 2m PVC cable - - - - 2 m cable - - - -
Nieuw
RS-stocknr. 202-4453
FabrikantRS PRO
42,78 €
Each
Aantal stuks
Block Diffuse Reflection 300 mm NPN NO/NC 2m PVC cable - - - - 2 m cable - - - -
Nieuw
RS-stocknr. 204-4003
FabrikantRS PRO
23,88 €
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Aantal stuks
Barrel Through Beam (Receiver) 10 m PNP NO/NC 2m PVC Cable - - 30V - 2 m cable LED IP67 - -
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