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 205-4953
製造零件編號WL4SLG-3P2252
BrandSick
HK$2,398.07
單位
Rectangular Retro Reflective 3.5 m PNP Connector M8 - - - 30V 4-pin - IP66, IP67 - -
RS庫存編號 179-5313
製造零件編號SA1E-NP1C
BrandIdec
HK$474.68
單位
Block Retroreflective 50 → 150 mm PNP 4-Pin M8 Connector - - - 30V - LED IP67 30 mA -
RS庫存編號 205-5258
製造零件編號WLA16P-34162100A00Z
BrandSick
HK$1,562.00
單位
Rectangular Retro Reflective 10 m NPN, PNP, PUSH/PULL Cable With M12 Male Connector - - - 30V 4-pin LED IP66, IP67, IP69 - IO-Link
RS庫存編號 729-5145
BrandRS PRO
HK$958.76
單位
Block Retroreflective 0.15 → 10 m NPN 4-Pin M12 Connector - - - 30V - LED IP67 100 mA -
RS庫存編號 179-5323
製造零件編號SA1E-TP2-2M
BrandIdec
HK$519.37
單位
Block Through Beam 20 m PNP Cable - - - 30V - Infrared IP67 15 mA -
RS庫存編號 180-6347
製造零件編號WTB16P-24161220A00
BrandSick
HK$1,959.68
單位
Block Background Suppression 10 → 500 mm NPN/PNP M12 Male Connector - - - 30V M12 Male 4-pin Connector LED IP66, IP67 100 mA -
RS庫存編號 860-1783
製造零件編號SM31RQD
BrandBanner
HK$1,704.79
單位
Block Through Beam (Receiver) 3 m NPN/PNP 4-Pin M12 Connector - - - 30V - LED IP67 25 mA -
RS庫存編號 821-0062
製造零件編號E3Z-T81A
BrandOmron
HK$1,528.33
單位
Block Through Beam (Emitter and Receiver) 10 m PNP 3-Wire Cable 2m - - - 24V Wire Lead LED IP67 35 mA -
全新
RS庫存編號 212-3151
製造零件編號GRTE18S-P2342
BrandSick
HK$555.47
單位
Cylindrical Energetic 5 → 550 mm Light Switching, PNP Connector M12 Light Switching - - 30V 3-Pin - IP67 100 mA -
RS庫存編號 394-8955
製造零件編號XUKT1KSML2
HK$3,092.41
單位
Compact Retroreflective 1.5 m PNP 3-Wire Cable 2m - - - 24V - LED IP65 100 mA -
RS庫存編號 297-5760
製造零件編號RLK39-8-2000-Z/31/40A/116
HK$2,653.88
單位
Block Diffuse 2000 mm Relay 4-Terminal Screw - 240V - 240V - Infrared LED IP67 3 A -
RS庫存編號 816-0371
製造零件編號E3FCRP112M
BrandOmron
HK$798.85
單位
Barrel Retroreflective 100 mm → 4 m PNP Pre-Wired Cable - - - 30V Wire Lead LED IP67, IP68, IP69K 25 mA -
RS庫存編號 458-579
製造零件編號E3ZM-B61 2M
BrandOmron
HK$1,599.15
單位
Block Retroreflective 500 mm NPN Pre-Wired Cable - - - 30V - LED IP69K 100 mA -
RS庫存編號 494-6809
製造零件編號BOWA 1208-PS-C-S49
BrandBALLUFF
HK$8,575.79
單位
Block Through Beam (Fork) 120 mm PNP 3-Pin M8 Connector - - - 30V - Infrared IP65 200 mA -
RS庫存編號 191-5212
製造零件編號VS8EAPLAF70Q
BrandBanner
HK$2,973.57
單位
- - 6 → 70 mm PNP 4-Pin M8/Picostyle Cable 200 mm - - - 30V Cable - IP67 12 mA -
RS庫存編號 818-1611
製造零件編號EE-SX674
BrandOmron
HK$198.72
單位
Fork Through Beam (Fork) 5 mm NPN 4-Pin Connector - - - 24V Connector Infrared IP50 12 mA -
RS庫存編號 775-4252
製造零件編號E3FBDP21
BrandOmron
HK$654.37
單位
Barrel Diffuse 100 mm PNP 4-Pin M12 Connector - - - 30V - LED IP67, IP69K 25 mA -
RS庫存編號 289-0142
製造零件編號VT18-2T1112
BrandSick
HK$1,054.67
單位
Barrel Diffuse 2 → 100 mm Triac 3-Wire Cable 2m - 253V - - - Infrared IP67 300 mA -
RS庫存編號 361-5683
製造零件編號EX26APN
BrandPanasonic
HK$1,214.09
單位
Block Retroreflective 6 → 14 mm PNP Cable - - - 24V - LED IP67 50 mA -
RS庫存編號 695-6808
製造零件編號XUB0ANSNM12
HK$723.99
單位
Barrel Multimode 0.12 m, 0.3 m, 2 m, 15 m NPN 4-Pin M12 Connector - - - 24V - Infrared IP65, IP67 100 mA -