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 205-5256
製造零件編號WL9C-3P2432A70
BrandSick
HK$1,741.98
單位
Rectangular Retro Reflective 5 m PNP Connector M12 - - - 30V 4-pin LED IP66, IP67, IP69K - IO-Link
RS庫存編號 821-0151
製造零件編號EE-SX772 2M
BrandOmron
HK$335.90
單位
- - - NPN - - - - - - GaAs Infrared LED IP60 - -
RS庫存編號 204-7581
製造零件編號FHDK 10P1101/KS35
BrandBaumer
HK$2,084.80
單位
Block Background Suppression 120 mm PNP 3-Pin M8 Connector - - - - - - - - -
RS庫存編號 752-5127
製造零件編號XUB9APBNL2
HK$740.71
單位
Barrel Retroreflective 2 m PNP 3-Wire Cable 2m - - - 24V - LED IP65, IP67 100 mA -
全新
RS庫存編號 210-3784
製造零件編號WTT280L-2P2531
BrandSick
HK$2,133.99
單位
Block Background Suppression 200 → 4000 mm PNP Male Connector M12 - - - 30V 5-Pin Red Light IP67 100 mA -
全新
RS庫存編號 210-3896
製造零件編號WTB4S-3P2131
BrandSick
HK$1,528.98
單位
Block Background Suppression 4 → 120 mm PNP Connector M8 - - - 30V 3-Pin Red Light IP66, IP67 100 mA -
全新
RS庫存編號 210-3849
製造零件編號WTB2S-2F3160
BrandSick
HK$1,298.05
單位
Block Background Suppression 1 → 66 mm PNP Cable with Connector M8 - - - 30V 3-Pin Red Light IP67 50 mA -
RS庫存編號 205-5137
製造零件編號VL180-2P42462
BrandSick
HK$791.99
單位
Barrel Retro Reflective 7 m PNP Connector M12 - - - 30V 4-pin LED IP67 - -
全新
RS庫存編號 212-2640
製造零件編號WFL5-40B416
BrandSick
HK$3,201.10
單位
- Fork Sensor 5 mm Light-/Dark Switching, NPN, PNP Male Connector M8 - - - 30V 4-Pin - IP65 100 mA -
RS庫存編號 665-8169
製造零件編號XUBTSPSNM12
HK$2,040.01
單位
Barrel Retroreflective 1.4 m PNP M12 Connector - - - 24V - LED IP69K 100 mA -
RS庫存編號 763-9359
製造零件編號XUMTAPCNL2
HK$1,111.38
單位
Block Retroreflective 1 m PNP Cable - - - 24V - Infrared IP67 100 mA -
RS庫存編號 609-0807
製造零件編號XUVH0312
HK$1,901.19
單位
Fork Through Beam 30 mm PNP 3-Wire Cable 2m - - - 24V - Infrared IP64 150 mA -
全新
RS庫存編號 210-3742
製造零件編號WTT12L-B2531
BrandSick
HK$2,772.03
單位
Block Background Suppression 50 → 2500 mm NPN, PNP, PUSH/PULL Male Connector M12 - - - 30V 5-Pin Red Light IP67 100 mA -
RS庫存編號 125-4516
製造零件編號PM-K25-R
BrandPanasonic
HK$274.40
單位
Fork Through Beam (Fork) 6 mm NPN 1m Cable - - - 24V Cable Infrared IP64 50 mA -
RS庫存編號 405-7404
製造零件編號QS18VP6DQ
BrandBanner
HK$1,161.20
單位
Block Diffuse 450 mm PNP Cable - - - 30V - LED IP67 100 mA -
RS庫存編號 125-4550
製造零件編號PM-Y45-P-C3
BrandPanasonic
HK$245.24
單位
Fork Through Beam (Fork) 6 mm PNP 3m Cable - - - 24V Cable Infrared IP64 50 mA -
全新
RS庫存編號 204-3977
BrandRS PRO
HK$445.47
單位
Barrel Diffuse Reflection 100 cm PNP NO/NC M12 Connector - - - 30V 2 m cable Yellow LED IP67 - -
全新
RS庫存編號 210-4055
製造零件編號VTF180-2F32412
BrandSick
HK$803.04
單位
Cylindrical Background Suppression 1 → 140 mm PNP Connector M12 - - - 30V 3-Pin Red Light IP67 100 mA -
RS庫存編號 205-4806
製造零件編號GRL18S-P1338
BrandSick
HK$570.73
單位
Barrel Retro Reflective 7.2 m PNP Cable - - - 30V 3-pin PinPoint LED IP67 - -
RS庫存編號 205-4909
製造零件編號WL4SLG-3F2234V
BrandSick
HK$2,783.07
單位
Rectangular Retro Reflective 4.5 m PNP Connector M8 - - - 30V 4-pin - IP69K - -