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.RS Components offer an extensive selection of photoelectric sensors for use various industrial applications. Our high-quality products are supplied from leading brands including Omron, Sick, Pepperl + Fuchs Telemecanique Sensors Baumer, Banner and of course RS PRO.

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 can detect 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 must 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 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.


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Description Price Sensor Style Detection Type Detection Range Output Type Electrical Connection Switching Mode Maximum AC Voltage Communication Protocol Maximum DC Voltage Terminal Type Light Source IP Rating Maximum Current Interface
RS庫存編號 372-8177
製造零件編號E3ZR612M
BrandOmron
HK$672.66
單位
Block Retroreflective 100 mm → 4 m NPN 3-Wire Cable 2m - - - 26.4V - LED IP69K 100 mA -
RS庫存編號 405-7252
製造零件編號T18SP6R
BrandBanner
HK$573.30
單位
Barrel Through Beam (Receiver) 20 m PNP 4-Wire Cable 2m - - - 30V - Infrared IP69K 150 mA -
RS庫存編號 729-5117
BrandRS PRO
HK$665.95
單位
Barrel Retro-Reflective 0.05 → 7 m PNP Cable - - - 30V - LED IP67 100 mA -
RS庫存編號 450-2904
製造零件編號OBS4000-18GM60-E5
HK$1,032.77
單位
Barrel Retroreflective 4 m PNP Cable - - - 30V - LED IP67 100 mA -
RS庫存編號 360-0451
製造零件編號WT24-2R210
BrandSick
HK$3,294.36
單位
- - - Relay - - - - - - LED IP69 - -
RS庫存編號 842-8588
製造零件編號WSE2S-2F1330
BrandSick
HK$1,369.91
單位
Block Through Beam (Emitter and Receiver) 0 → 2.5 m PNP 2-Wire Cable 2m - - - 30V - LED IP67 20 mA -
RS庫存編號 860-1291
製造零件編號S18MBQ
BrandBanner
HK$4,340.07
單位
Barrel - - Bipolar NPN/PNP 5-Pin M12 Connector - - - 30V - LED IP67 43 mA -
RS庫存編號 770-7008
製造零件編號WL250-2R1531
BrandSick
HK$1,478.63
單位
Block Retroreflective 0.01 → 15 m Relay 5-Wire Cable 2m - 240V - 240V - LED IP67 - -
RS庫存編號 458-840
製造零件編號WTB12-3P2411
BrandSick
HK$2,413.65
單位
- - - PNP - - - - - - LED IP66, IP67, IP69 - -
RS庫存編號 695-6814
製造零件編號XUB2BKSNM12T
HK$364.60
單位
Barrel Through Beam (Emitter) 15 m Relay 4-Pin M12 Connector - - - 24V - Infrared IP65, IP67 100 mA -
RS庫存編號 818-0299
製造零件編號DS35-B15821
BrandSick
HK$4,432.41
單位
Block Background Suppression 50 mm → 3.1 m NPN/PNP 5-Pin M12 Connector - - IO-LINK 30V M12 Connector Laser Light IP65, IP67 - IO-Link
RS庫存編號 739-6664
製造零件編號OJ5052
HK$1,588.22
單位
Block Diffuse 15 → 200 mm PNP 4-Pin M8 Connector - - - 30V - LED IP67 200 mA -
RS庫存編號 768-9470
製造零件編號WTB9-3P1161
BrandSick
HK$1,674.33
單位
Block Background Suppression 20 → 350 mm PNP Pre-Wired Cable - - - 30V - LED IP66, IP67, IP69K 100 mA -
RS庫存編號 739-6673
製造零件編號O1D100
HK$3,150.48
單位
Block Diffuse 0.2 → 10 m Analogue, PNP M12 Connector - - - 30V - Laser Light IP67 200 mA -
RS庫存編號 919-6582
製造零件編號WTB2S-2P3251
BrandSick
HK$1,347.87
單位
Block Background Suppression 1 → 150 mm PNP 4-Pin M8 Connector - - - 30V M8 LED IP67 20 mA -
RS庫存編號 743-1313
製造零件編號E3Z-LS86
BrandOmron
HK$1,420.21
單位
Block Background Suppression 20 → 200 mm PNP 4-Pin M8 Connector - - - 26.4V - LED IP67 100 mA -
RS庫存編號 530-0939
製造零件編號WTB4-3P2161
BrandSick
HK$1,522.12
單位
Block Diffuse 4 → 150 mm PNP 3-Pin M8 Connector - - - 30V - LED IP66, IP67 100 mA -
RS庫存編號 901-2910
製造零件編號EX-11A-PN
BrandPanasonic
HK$715.04
單位
Block Through Beam (Emitter and Receiver) 150 mm PNP Cable - - - 24V Wire Lead LED IP67 10 mA -
RS庫存編號 444-3552
製造零件編號XUK0AKSAM12T
HK$652.30
單位
Compact Through Beam (Emitter) 30 m - 4-Pin M12 Connector - - - 24V - Infrared IP65 100 mA -
RS庫存編號 444-3625
製造零件編號XUX0ARCTT16T
HK$1,062.95
單位
Block Through Beam (Emitter) 40 m - 3-Terminal Screw - 240V - 240V - Infrared IP65, IP67 3 A, 500 mA -