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 Maximum DC Voltage Optical Technology Terminal Type Light Source IP Rating Maximum Current Interface Response Time
RS-stocknr. 847-0567
FabrikantnummerE58-18DP100-HL
FabrikantEaton
393,41 €
Each
Aantal stuks
Barrel Diffuse Maximum of 100 mm NPN/PNP Cable - 30V - - LED - 250 mA - 1 ms
RS-stocknr. 847-0331
Fabrikantnummer13104RQD07
FabrikantEaton
158,77 €
Each
Aantal stuks
Block Diffuse Maximum of 50 mm NPN/PNP 4-Pin Connector - 30V - - LED IP69K 100 (PNP) mA, 250 (NPN) mA - 1 ms
RS-stocknr. 847-0236
Fabrikantnummer11102AQD07
FabrikantEaton
105,14 €
Each
Aantal stuks
Block Through Beam (Emitter) Maximum of 24 m NPN/PNP 4-Pin Connector - 30V - - LED IP69K 100 (PNP) mA, 250 (NPN) mA - 3.5 ms
RS-stocknr. 847-0343
Fabrikantnummer13105AQD07
FabrikantEaton
158,77 €
Each
Aantal stuks
Block Diffuse Maximum of 50 mm NPN/PNP 4-Pin Connector - 30V - - LED IP69K 100 (PNP) mA, 250 (NPN) mA - 1 ms
RS-stocknr. 847-0700
FabrikantnummerE65-SMPP050-HL
FabrikantEaton
91,41 €
Each
Aantal stuks
Block Diffuse Maximum of 50 mm NPN, PNP Cable - 30V - - LED IP68 100 mA - 1 ms
RS-stocknr. 847-0255
Fabrikantnummer12102A6517
FabrikantEaton
124,17 €
Each
Aantal stuks
Block Through Beam (Receiver) Maximum of 24 m NPN/PNP Cable - 30V - - LED IP69K 100 (PNP) mA, 250 (NPN) mA - 3.5 ms
RS-stocknr. 847-0252
Fabrikantnummer12102AQD07
FabrikantEaton
139,37 €
Each
Aantal stuks
Block Through Beam (Receiver) Maximum of 24 m NPN/PNP 4-Pin Connector - 30V - - LED IP69K 100 (PNP) mA, 250 (NPN) mA - 3.5 ms
RS-stocknr. 847-0371
Fabrikantnummer13108AQD07
FabrikantEaton
158,77 €
Each
Aantal stuks
Block Diffuse Maximum of 150 mm NPN/PNP 4-Pin Connector - 30V - - LED IP69K 100 (PNP) mA, 250 (NPN) mA - 1 ms
RS-stocknr. 847-0766
FabrikantnummerE65-SMTS15-HA
FabrikantEaton
93,92 €
Each
Aantal stuks
Block Through Beam (Emitter) Maximum of 15 m NPN/PNP Cable - 30V - - LED IP68 100 mA - 1 ms
RS-stocknr. 847-0261
Fabrikantnummer13100A6517
FabrikantEaton
165,60 €
Each
Aantal stuks
Block Diffuse Maximum of 610 mm NPN/PNP Cable - 30V - - LED IP69K 100 (PNP) mA, 250 (NPN) mA - 1 ms
RS-stocknr. 847-0249
Fabrikantnummer12100AQD07
FabrikantEaton
116,27 €
Each
Aantal stuks
Block Through Beam (Receiver) Maximum of 6 m NPN/PNP 4-Pin Connector - 30V - - LED IP69K 100 (PNP) mA, 250 (NPN) mA - 3.5 ms
RS-stocknr. 847-0319
Fabrikantnummer13104A6517
FabrikantEaton
140,36 €
Each
Aantal stuks
Block Diffuse Maximum of 50 mm NPN/PNP Cable - 30V - - LED IP69K 100 (PNP) mA, 250 (NPN) mA - 1 ms