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.


...
Read more Read less

Filters

Viewing 81 - 100 of 1846 products
Results per page
Description Price 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 Stock No. 125-4525
Mfr. Part No.PM-U25-C3
BrandPanasonic
MYR139.40
Each
units
Fork Through Beam (Fork) 6 mm NPN 3m Cable - 24V Phototransistor Cable Infrared IP64 50 (Sink Current) mA - 20 (Received) μs, 80 (Interrupted) μs
RS Stock No. 326-7240
Mfr. Part No.E3TSL132M
BrandOmron
MYR530.61
Each
units
Block Retroreflective 5 → 15 mm PNP Pre-Wired Cable - 26.4V Phototransistor - LED IP67 50 mA - 1 ms
RS Stock No. 121-2722
Mfr. Part No.WTB11-2P2461
BrandSick
MYR651.45
Each
units
Block Background Suppression 30 → 1100 mm PNP 4-Pin M12 Connector - 30V - M12 LED IP66, IP67, IP69K 30 mA - 2.5 ms
RS Stock No. 821-0066
Mfr. Part No.E3Z-T81-M1J-1 0.3M
BrandOmron
MYR480.06
Each
units
Block Through Beam (Emitter and Receiver) 15 m PNP Pre-Wired Cable - 24V LED Wire Lead Infrared IP67 35 mA - 1 ms
RS Stock No. 219-2397
Mfr. Part No.EE-SPY402 JPN
BrandOmron
MYR215.50
Each
units
Block Retroreflective 5 mm NPN Non-Solder Connector - 24V Phototransistor - Infrared IP50 80 mA - -
RS Stock No. 784-6692
Mfr. Part No.DT50-P1123
BrandSick
MYR1,966.47
Each
units
Block Background Suppression 200 → 10000 mm Analogue 5-Pin M12 Connector - 30V Phototransistor - Laser Light IP65 100 mA - 20 ms, 30 ms
RS Stock No. 818-1716
Mfr. Part No.EE-SX675
BrandOmron
MYR105.36
Each
units
Fork Through Beam (Fork) Maximum of 5 mm NPN 4-Pin Connector - 24V Phototransistor Connector Infrared IP50 12 mA - -
RS Stock No. 488-132
Mfr. Part No.O5P200
MYR548.98
Each
units
Block Retroreflective 0.1 → 7 m PNP M12 Connector - 36V Phototransistor - LED IP67 200 mA - -
RS Stock No. 842-8585
Mfr. Part No.WTB2S-2P1360
BrandSick
MYR451.47
Each
units
Block Background Suppression 1 → 66 mm PNP 3-Wire Cable 2m - 30V Visible Red LED - LED IP67 20 mA - 0.5 ms
RS Stock No. 493-7322
Mfr. Part No.WF15-40B410
BrandSick
MYR772.65
Each
units
Fork Through Beam (Fork) 15 mm NPN/PNP 4-Pin M8 Connector - 30V Phototransistor - Infrared IP65 100 mA - 100 μs
RS Stock No. 818-1738
Mfr. Part No.EE-SX672-WR 1M
BrandOmron
MYR124.63
Each
units
Fork Through Beam (Fork) Maximum of 5 mm NPN - - 24V Phototransistor Pre-Wired Infrared IP50 35 mA - -
RS Stock No. 219-2303
Mfr. Part No.EE-SX673
BrandOmron
MYR105.36
Each
units
Fork Through Beam (Fork) 5 mm NPN Connector - 24V Phototransistor - Infrared IP50 100 mA - -
RS Stock No. 847-9426
Mfr. Part No.QS18VP6RQ8
BrandBanner
MYR386.38
Each
units
Barrel Through Beam (Receiver) 20 m PNP 4-Pin Connector - 30V Infrared LED - LED IP67 <25 mA - 375 (OFF) μs, 750 (ON) μs
RS Stock No. 857-7564
Mfr. Part No.CGPS-UT-6MN
MYR341.73
Each
units
Barrel Through Beam (Emitter and Receiver) 0 → 6 m NPN NO/NC Cable - 30V - - LED IP66 <20 mA - 1 ms
RS Stock No. 374-2050
Mfr. Part No.E3ZD812M
BrandOmron
MYR482.22
Each
units
Block Diffuse 5 → 100 mm PNP 3-Wire Cable 2m - 26.4V Phototransistor - Infrared IP69K 100 mA - 1 ms
RS Stock No. 714-1622
Mfr. Part No.ML100-55/103/115
MYR395.62
Each
units
Block Retroreflective 5 m PNP 3-Wire Cable 2m - 30V Phototransistor - LED IP67 100 mA - 0.5 ms
RS Stock No. 741-7644
Mfr. Part No.VS/VE18-4P3140V
BrandSick
MYR736.29
Each
units
Barrel Through Beam (Emitter and Receiver) 20 m PNP 4-Pin M12 Connector - 30V Phototransistor - Infrared IP67, IP68, IP69K 100 mA - <=2 ms
RS Stock No. 444-3417
Mfr. Part No.XUB0AKSNL2T
MYR295.45
Each
units
Barrel Through Beam (Emitter) 15 m - 3-Wire Cable 2m - 24V - - Infrared IP65, IP67 100 mA - <2 ms
RS Stock No. 510-3249
Mfr. Part No.RLK29-55/59/116-SET
MYR457.85
Each
units
Block Retroreflective 12 m Relay 6-Terminal Screw 230V 230V - - LED IP67 2 A - 50 ms
RS Stock No. 815-4174
Mfr. Part No.O300.GP-11110415
BrandBaumer
MYR668.67
Each
units
Block Diffuse 30 → 200 mm Push Pull 4-Pin M8 Connector - 30V - Cable LED IP67 45 mA - <0.49 ms
Related Products
Six sensing methodsCable model (three cable lengths) and ...
Description:
Six sensing methodsCable model (three cable lengths) and M8 connector models are available.NPN output, PNP output, light ON, dark ON can be selected.Sensing range doubled with SA1E-T through-beam and SA1E-P polarized retro-reflective models.Highly stable with excellent resistance against vibration and ...
Six sensing methodsCable model (three cable lengths) and ...
Description:
Six sensing methodsCable model (three cable lengths) and M8 connector models are available.NPN output, PNP output, light ON, dark ON can be selected.Sensing range doubled with SA1E-T through-beam and SA1E-P polarized retro-reflective models.Highly stable with excellent resistance against vibration and ...
Six sensing methodsCable model (three cable lengths) and ...
Description:
Six sensing methodsCable model (three cable lengths) and M8 connector models are available.NPN output, PNP output, light ON, dark ON can be selected.Sensing range doubled with SA1E-T through-beam and SA1E-P polarized retro-reflective models.Highly stable with excellent resistance against vibration and ...
Universal voltage types operate on 24 to 240V ...
Description:
Universal voltage types operate on 24 to 240V AC and 12 to 240V DC. DC power types operate on 12 to 24V DC.Four sensing methods: through-beam, polarized retro-reflective, diffuse-reflective, and background suppression.Adjustable time delay: 0.1 to 5 secondsMounting hole centers: ...