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 219-2296
製造零件編號EE-SX672
BrandOmron
HK$200.69
單位
Fork Through Beam (Fork) 5 mm NPN Connector - - - 24V - Infrared IP50 100 mA -
RS庫存編號 752-5060
製造零件編號XUB2AKSNM12T
HK$431.19
單位
Barrel Through Beam (Emitter) 15 m Solid State 4-Pin M12 Connector - - - 24V - Infrared IP65, IP67 100 mA -
RS庫存編號 818-1621
製造零件編號EE-SX672P
BrandOmron
HK$257.98
單位
Fork Through Beam (Fork) 5 mm PNP 4-Pin Connector - - - 24V Connector Infrared IP50 12 mA -
RS庫存編號 444-3417
製造零件編號XUB0AKSNL2T
HK$513.82
單位
Barrel Through Beam (Emitter) 15 m - 3-Wire Cable 2m - - - 24V - Infrared IP65, IP67 100 mA -
RS庫存編號 768-5881
製造零件編號E3FARP21
BrandOmron
HK$512.81
單位
Barrel Retro-Reflective 0.1 → 4 m PNP 4-Pin M12 Connector - - - 30V - LED IP67, IP69K 25 mA -
RS庫存編號 817-1560
製造零件編號RL31-8-2500-IR/73c/136
HK$741.99
單位
Block Diffuse 2.5 m Push Pull 4-Pin M12 Connector - - - 30V - LED IP67 100 mA -
RS庫存編號 444-3394
製造零件編號XUB0APSNL2
HK$1,315.98
單位
Barrel Diffuse, Retro-Reflective, Through Beam (Receiver) 0.12 m, 0.3 m, 2 m, 15 m PNP Cable - - - 24V - Infrared IP65, IP67 100 mA -
RS庫存編號 729-5157
BrandRS PRO
HK$918.53
單位
Block Retroreflective 0.15 → 10 m PNP 4-Pin M12 Connector - - - 30V - LED IP67 100 mA -
RS庫存編號 817-1557
製造零件編號RL31-8-1200-RT/73c/136
HK$760.75
單位
Block Diffuse 1.2 m Push Pull 4-Pin M12 Connector - - - 30V - LED IP67 100 mA -
RS庫存編號 458-828
製造零件編號WL12-3P2431
BrandSick
HK$1,407.25
單位
Block Retro-Reflective 7 m PNP 4-Pin M12 Connector - - - 30V - LED IP69K 100 mA -
RS庫存編號 358-7926
製造零件編號WL260-R270
BrandSick
HK$1,746.85
單位
Block Retro-Reflective 0.01 → 15 m Relay Cable - 240V - 30V - LED IP67 3 A -
RS庫存編號 512-4640
製造零件編號XUK1ARCNL2
HK$1,144.72
單位
Compact Retro-Reflective 7 m Relay Cable - 240V - 240V - Infrared IP65 3 A -
RS庫存編號 877-7405
製造零件編號HG-C1050
BrandPanasonic
HK$3,546.52
單位
Block Background Suppression 50 mm NPN Cable - - - 24V - Laser Light IP67 - -
RS庫存編號 512-4656
製造零件編號XUK9ARCNL2
HK$811.21
單位
Compact Retroreflective 5 m Relay 5-Wire Cable 2m - 240V - 240V - LED IP65 3 A -
RS庫存編號 512-4662
製造零件編號XUK5ARCNL2
HK$1,021.46
單位
Compact Diffuse 1 m Relay 5-Wire Cable 2m - 240V - 240V - Infrared IP65 3 A -
RS庫存編號 778-8704
製造零件編號E3JK-RR11 2M
BrandOmron
HK$919.20
單位
Block Retroreflective 7 m, 100 mm Relay 5-Wire Cable 2m - 240V - 240V Wire Lead LED IP64 - -
RS庫存編號 815-4174
製造零件編號O300.GP-11110415
BrandBaumer
HK$1,494.52
單位
Block Diffuse 30 → 200 mm Push Pull 4-Pin M8 Connector - - - 30V Cable LED IP67 45 mA -
RS庫存編號 919-6585
製造零件編號WTB9-3P2261
BrandSick
HK$1,604.23
單位
Block Background Suppression 20 → 350 mm PNP 4-Pin M8 Connector - - - 30V M8 LED IP66, IP67, IP69K 30 mA -
RS庫存編號 818-1576
製造零件編號EE-SX670P
BrandOmron
HK$246.85
單位
Fork Through Beam (Fork) 5 mm PNP 4-Pin Connector - - - 24V Connector Infrared IP50 12 mA -
RS庫存編號 617-0666
製造零件編號E3ZLR86
BrandOmron
HK$3,061.78
單位
Block Retroreflective 0.2 → 7 m PNP 4-Pin M8 Connector - - - 26.4V - LED IP67 100 mA -