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 1741 - 1760 of 1824 products
Results per page
Description Price Sensor Style Detection Type Detection Range Output Type Electrical Connection Maximum AC Voltage Communication Protocol Maximum DC Voltage Terminal Type Light Source IP Rating Maximum Current Interface Response Time
RS Stock No. 288-7304
Mfr. Part No.E3SRS30B430
BrandOmron
SGD564.30
Each
units
Block Retroreflective 300 mm PNP 3-Wire Cable 2m - - 24V - Infrared IP67 100 mA - 1 ms
RS Stock No. 775-4338
Mfr. Part No.E3FBVP112M
BrandOmron
SGD160.61
Each
units
Barrel Background Suppression 10 → 50 mm PNP Pre-Wired Cable - - 30V - LED IP67, IP69K 25 mA - 0.5 ms
RS Stock No. 752-5174
Mfr. Part No.XUB2APBNL2R
SGD94.37
Each
units
Barrel Through Beam (Receiver) 15 m PNP Cable - - 24V - Infrared IP65, IP67 100 mA - <1 ms
RS Stock No. 847-9530
Mfr. Part No.QS30LDQ
BrandBanner
SGD323.69
Each
units
Block Diffuse Maximum of 400 mm NPN/PNP 5-Pin M12 Connector - - 30V - Laser Light IP67 35 mA - 500 μs
RS Stock No. 190-4209
Mfr. Part No.T18-2VPLP-Q8
BrandBanner
SGD220.58
Each
units
Barrel Retroreflective 6 m PNP 4 Pin M12 Connector - - 30V 4 Pin M12 Connector Red LED IP67, IP68, IP69K <16 mA - 0.75 (OFF) ms, 1.5 (ON) ms
RS Stock No. 816-0365
Mfr. Part No.E3FCRN112M
BrandOmron
SGD139.86
Each
units
Barrel Retroreflective 0.1 → 4 m NPN 4-Wire Cable 2m - - 30V Wire Lead LED IP67, IP68, IP69K 25 mA - 0.5 ms
RS Stock No. 743-1329
Mfr. Part No.E3ZM-B86T
BrandOmron
SGD257.18
Each
units
Block Retroreflective 100 500 mm PNP 4-Pin M8 Connector - - 30V - LED IP67, IP69K 100 mA - 1 ms
RS Stock No. 615-9316
Mfr. Part No.E3T-SR22
BrandOmron
SGD209.01
Each
units
Block Retroreflective 10 → 200 mm NPN Pre-Wired Cable - - 26.4V - LED IP67 50 mA - 1 ms
RS Stock No. 176-9847
Mfr. Part No.QS18VN6LVQ8
BrandBanner
SGD168.74
Each
units
Block Through Beam 6500 mm NPN M12 Connector - - 30V Connector LED IP67 - - 0.6 ms
RS Stock No. 176-9846
Mfr. Part No.QS18VN6RQ8
BrandBanner
SGD135.01
Each
units
Block Through Beam 20 m NPN M12 Connector - - 30V Connector LED IP67 - - 0.37 (OFF) ms, 0.75 (ON) ms
RS Stock No. 2509667390
Mfr. Part No.VS1AP5CV20
SGD159.00
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509665675
Mfr. Part No.SM312CV
SGD195.13
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2550074676
Mfr. Part No.SLM50B6
SGD258.16
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509665164
Mfr. Part No.OPBA2QD
SGD174.81
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508470047
Mfr. Part No.MPD2HD
SGD252.46
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509666779
Mfr. Part No.SMU31E
SGD172.77
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508470097
Mfr. Part No.MPS11HD
SGD220.42
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509202693
Mfr. Part No.MHP-D33Q
SGD264.49
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2508470154
Mfr. Part No.MPV11HD
SGD252.46
Each
units
- - - - - - - - - - - - - -
RS Stock No. 2509667435
Mfr. Part No.VS3AN5XLP
SGD191.10
Each
units
- - - - - - - - - - - - - -
Related Products
Omron E3Z-IL photoelectric sensors with IO-Link connectivity offer ...
Description:
Omron E3Z-IL photoelectric sensors with IO-Link connectivity offer reliable detection. IO-Link connectivity makes sensor level information visible and notifies of faults and problems in the Sensor in real time. IO-Link compatibleIP67 ratedSmall dead-band for sensing close targetsRetro-reflective versions have ...
Baumer OR18.EL/TL through beam laser photoelectric sensors offer ...
Description:
Baumer OR18.EL/TL through beam laser photoelectric sensors offer a high sensing distance laser light source in a robust compact design. The robust and resistant housing provides effective and reliable use in industrial environments. OR18 sensors combine functionality with simple 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 ...
Nickel Brass or PA Housing with PMMA lensIP67 ...
Description:
Nickel Brass or PA Housing with PMMA lensIP67 ratedPrecise background suppressionLED status indicationNo load current 40mAOperating temperature range; –25° to +70°CLight/dark switching selectableShort circuit, overload and reverse polarity protectionInterference pulse suppressionDimensions: Overall length; 81mm.