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 860-1727
製造零件編號SM312LVQD-50939
BrandBanner
HK$1,150.14
單位
Block Retroreflective 5 m NPN/PNP 4-Pin Connector - - - 30V - LED IP67 25 mA -
RS庫存編號 125-4565
製造零件編號PM-L65
BrandPanasonic
HK$165.00
單位
Fork Through Beam (Fork) 6 mm NPN 4-Pin Connector - - - 24V 4-Pin Connector Infrared IP40 50 mA -
RS庫存編號 902-7164
製造零件編號BOS 21M-PA-PR10-S4
BrandBALLUFF
HK$1,561.42
單位
Block Retroreflective 100 mm → 8 m PNP M12 Connector - - - 30V Connector LED IP67 100 mA -
全新
RS庫存編號 210-3677
製造零件編號WTB9-3P2211
BrandSick
HK$1,716.08
單位
Block Background Suppression 20 → 500 mm PNP Male Connector M8 - - - 30V 4-Pin Infrared IP66, IP67, IP69K 100 mA -
RS庫存編號 775-4372
製造零件編號E3RBTP112M
BrandOmron
HK$1,407.03
單位
Barrel Through Beam (Emitter and Receiver) 15 m PNP Pre-Wired Cable - - - 30V - LED IP67, IP69K 40 mA -
RS庫存編號 191-5203
製造零件編號VS8APFF50B
BrandBanner
HK$2,119.57
單位
- - 2 → 50 mm PNP 4-Wire Cable 2m - - - 30V Cable Blue LED IP67 20 mA -
全新
RS庫存編號 210-3811
製造零件編號WTB12-3N2411
BrandSick
HK$2,475.04
單位
Block Background Suppression 20 → 600 mm NPN Male Connector M12 - - - 30V 4-Pin - IP66, IP67, IP69K 100 mA -
RS庫存編號 219-011
製造零件編號WL100L-E1131
BrandSick
HK$1,539.45
單位
Block Retroreflective 0.08 → 12 m NPN Cable - - - 30V - Laser Light IP65 100 mA -
RS庫存編號 775-4243
製造零件編號E3FBRP22
BrandOmron
HK$839.87
單位
Barrel Retroreflective 0.1 → 500 mm PNP 4-Pin M12 Connector - - - 30V - LED IP67, IP69K 25 mA -
全新
RS庫存編號 210-3660
製造零件編號WTB8L-P1131
BrandSick
HK$2,343.06
單位
Block Background Suppression 30 → 300 mm PNP Cable 2 m - - - 30V - Red Light IP67 100 mA -
全新
RS庫存編號 212-2873
製造零件編號GRSE18S-F2336
BrandSick
HK$709.43
單位
Cylindrical Through-Beam 0 → 15000 mm Dark switching, PNP Connector M12 - - - 30V 3-Pin Polarized Red Light IP67 100 mA -
全新
RS庫存編號 210-7842
製造零件編號OM70-P0250.HH0130.VI
BrandBaumer
HK$18,523.58
單位
Rectangular Distance 250 mm RS 485 Push Pull Connector M12 8 Pin - - - - - - - - -
RS庫存編號 184-6328
製造零件編號1094791
BrandSick
HK$638.27
單位
Cylindrical Diffuse 3 → 250 mm NPN M12-4 Pin Connector - - - 30V M12 LED IP67 30 mA -
全新
RS庫存編號 212-2982
製造零件編號WSE4-3P1430
BrandSick
HK$1,683.05
單位
Block Through-Beam 0 → 4000 mm Light switching, Other, PNP Cable - - - 30V 3-Pin Polarized Red Light IP66, IP67 100 mA -
RS庫存編號 218-973
製造零件編號WL100L-F2231
BrandSick
HK$1,543.86
單位
Block Retroreflective 0.08 → 12 m PNP 4-Pin M8 Connector - - - 30V - Laser Light IP65 100 mA -
全新
RS庫存編號 212-3009
製造零件編號WSE9-3P3430
BrandSick
HK$1,815.03
單位
Block Through-Beam 0 → 10000 mm Light/Dark switching, Other, PNP Connector M12 - - - 30V 4-Pin Polarized Red Light IP66, IP67, IP69K 100 mA -
全新
RS庫存編號 204-4007
BrandRS PRO
HK$206.98
單位
Barrel Through Beam (Emitter) 20 m NPN NO+NC 2m PVC Cable - - - 30V 2 m cable LED IP67 - -
全新
RS庫存編號 210-7833
製造零件編號OADM 13I6475/S35A
BrandBaumer
HK$16,349.12
單位
Rectangular Background Suppression 350 mm Analogue Connector M8 4 Pin - - - - - - - - -
RS庫存編號 205-5262
製造零件編號WLA16P-24161100A00Z
BrandSick
HK$1,452.00
單位
Rectangular Retro Reflective 10 m NPN, PNP, PUSH/PULL Connector M12 - - - 30V 4-pin LED IP66, IP67, IP69 - IO-Link
RS庫存編號 306-2146
製造零件編號E3TFT142M
BrandOmron
HK$1,413.98
單位
Block Through Beam (Emitter and Receiver) 500 mm PNP 3-Wire Cable 2m - - - 26.4V - LED IP67 50 mA -