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.


...
Lees meer Lees minder

Filters

1 - 20 van 56 producten worden weergegeven
Resultaten per pagina
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. 739-6673
FabrikantnummerO1D100
Fabrikantifm electronic
€ 306,60
Each
Aantal stuks
Block Diffuse 0.2 → 10 m PNP M12 Connector - 30V - - Laser Light IP67 200 mA - -
RS-stocknr. 814-0361
FabrikantnummerOID200
Fabrikantifm electronic
€ 158,60
Each
Aantal stuks
Barrel Background Suppression 0.03 → 2 m NPN/PNP M12 Connector - 30V - Wire Lead LED IP65, IP67 <75 mA @ 24 V dc IO-Link -
RS-stocknr. 814-0345
FabrikantnummerOGH500
Fabrikantifm electronic
€ 119,10
Each
Aantal stuks
Barrel Diffuse 15 → 300 mm PNP M12 Connector - 36V - Wire Lead LED IP67 25 mA - -
RS-stocknr. 814-0370
FabrikantnummerO5D100
Fabrikantifm electronic
€ 157,30
Each
Aantal stuks
Block Distance 0.03 → 2 m PNP M12 Connector - 30V - Cable LED IP65, IP67 <75 mA @ 24 V dc IO-Link -
RS-stocknr. 425-8146
FabrikantnummerOJ5026
Fabrikantifm electronic
€ 117,50
Each
Aantal stuks
Block Retroreflective 2 m PNP M8 Connector - 30V - - LED IP67 200 mA - -
RS-stocknr. 739-6664
FabrikantnummerOJ5052
Fabrikantifm electronic
€ 165,90
Each
Aantal stuks
Block Diffuse 15 → 200 mm PNP 4-Pin M8 Connector - 30V - - LED IP67 200 mA - -
RS-stocknr. 425-8130
FabrikantnummerOJ5004
Fabrikantifm electronic
€ 117,50
Each
Aantal stuks
Block Retroreflective 2 m PNP M8 Connector - 30V - - LED IP67 200 mA - -
RS-stocknr. 488-132
FabrikantnummerO5P200
Fabrikantifm electronic
€ 121,23
Each
Aantal stuks
Block Retroreflective 0.1 → 7 m PNP M12 Connector - 36V - - LED IP67 200 mA - -
RS-stocknr. 488-126
FabrikantnummerO5H200
Fabrikantifm electronic
€ 125,50
Each
Aantal stuks
Block Diffuse 50 → 1400 mm PNP M12 Connector - 36V - - LED IP65 200 mA - -
RS-stocknr. 191-9933
FabrikantnummerOF5012
Fabrikantifm electronic
€ 131,40
Each
Aantal stuks
Barrel Diffuse 1 → 200 mm PNP M12 Connector - 36V - - Infrared IP65 200 mA - -
RS-stocknr. 488-122
FabrikantnummerO5H500
Fabrikantifm electronic
€ 162,80
Each
Aantal stuks
Block Diffuse 50 → 1800 mm PNP M12 Connector - 36V - - LED IP67 200 mA - -
RS-stocknr. 425-8411
FabrikantnummerOJ5036
Fabrikantifm electronic
€ 173,70
Each
Aantal stuks
Block Retro-Reflective 8 m PNP M8 Connector - 30V Laser, Phototransistor - LED IP67 200 mA - -
RS-stocknr. 425-8001
FabrikantnummerOJ5009
Fabrikantifm electronic
€ 81,10
Each
Aantal stuks
Block Through Beam (Receiver) 10 m PNP M8 Connector - 30V - - LED IP67 200 mA - -
RS-stocknr. 487-898
FabrikantnummerO1D106
Fabrikantifm electronic
€ 336,20
Each
Aantal stuks
Block Background Suppression 1 → 75 m PNP M12 Connector - 30V - - Laser Light IP67 200 mA - -
RS-stocknr. 425-8017
FabrikantnummerOJ5008
Fabrikantifm electronic
€ 65,70
Each
Aantal stuks
Block Through Beam (Emitter) 10 m PNP M8 Connector - 30V - - LED IP67 200 mA - -
RS-stocknr. 425-8405
FabrikantnummerOJ5014
Fabrikantifm electronic
€ 173,70
Each
Aantal stuks
Block Retro-Reflective 8 m PNP M8 Connector - 30V Laser, Phototransistor - LED IP67 200 mA - -
RS-stocknr. 814-0349
FabrikantnummerOGP500
Fabrikantifm electronic
€ 111,60
Each
Aantal stuks
Barrel Retroreflective 0.03 → 5 m PNP M12 Connector - 36V - 4-Pin LED IP67 20 mA - -
RS-stocknr. 739-6620
FabrikantnummerO4H500
Fabrikantifm electronic
€ 171,30
Each
Aantal stuks
Block Diffuse 100 → 2600 mm PNP M12 Connector - 36V - - LED IP67 200 mA - -
RS-stocknr. 191-9949
FabrikantnummerOF5027
Fabrikantifm electronic
€ 131,40
Each
Aantal stuks
Barrel Diffuse 1 → 400 mm PNP M12 Connector - 36V - - Infrared IP65 200 mA - -
RS-stocknr. 814-0358
FabrikantnummerOGE500
Fabrikantifm electronic
€ 96,40
Each
Aantal stuks
Barrel Through Beam (Receiver) Maximum of 25 m PNP M12 Connector - 36V - Wire Lead LED IP67 11 mA - -