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
全新
RS庫存編號 212-2605
製造零件編號UFN3-70B417
BrandSick
HK$4,774.04
單位
- Fork Sensor 3 mm Light-/Dark Switching, PNP Male Connector M8 - - - 30V 4-Pin - IP65 100 mA -
RS庫存編號 500-204
製造零件編號3RG7057-3CC00-PF
HK$6,156.75
單位
Block Diffuse 2 M PNP 4-Pin M12 Connector - - - 30V - Laser Light IP67 200 mA -
全新
RS庫存編號 210-4027
製造零件編號RT-B1221
BrandSick
HK$1,573.05
單位
- Background Suppression 60 → 900 mm NPN, PNP Male Connector - - - 30V 4-Pin - IP67 100 mA -
RS庫存編號 818-1716
製造零件編號EE-SX675
BrandOmron
HK$217.08
單位
Fork Through Beam (Fork) 5 mm NPN 4-Pin Connector - - - 24V Connector Infrared IP50 12 mA -
RS庫存編號 184-6313
製造零件編號1069628
BrandSick
HK$872.57
單位
Cylindrical Through Beam 0 → 10 m NPN M12-4 Pin Connector - - - 30V M12 LED IP67 30 mA -
全新
RS庫存編號 210-3883
製造零件編號WTB4S-3F2131
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 -
RS庫存編號 847-9366
製造零件編號QS18VP6LLPQ8
BrandBanner
HK$1,916.89
單位
Barrel Retroreflective 100 mm → 10 m PNP 4-Pin M12 Connector - - - 30V - Laser Light IP67 15 mA -
RS庫存編號 500-147
製造零件編號3RG7406-7CH61-PF
HK$4,177.83
單位
- Diffuse 30 → 110 mm PNP 4-Pin M8 Connector - - - 30V - Laser Light IP67 100 mA -
全新
RS庫存編號 212-2914
製造零件編號GSE6-P6212
BrandSick
HK$1,143.97
單位
Block Through-Beam 0 → 15000 mm Light/Dark switching, PNP Connector M8 - - - 30V 4-Pin Polarized Red Light IP67 100 mA -
全新
RS庫存編號 202-5452
BrandRS PRO
HK$662.69
單位
Block Diffuse 0 → 800 mm Relay NO/NC Terminal Block - - - - Terminal - IP67 - -
全新
RS庫存編號 205-4840
製造零件編號GRL18S-E2336
BrandSick
HK$531.29
單位
Barrel Retro Reflective 7.2 m NPN Connector M12 - - - 30V 3-pin PinPoint LED IP67 - -
RS庫存編號 179-5317
製造零件編號SA1E-PP1C
BrandIdec
HK$455.46
單位
Block Retroreflective 1.3 → 5 m PNP 4-Pin M8 Connector - - - 30V - LED IP67 30 mA -
全新
RS庫存編號 210-3933
製造零件編號WTB4SL-3N1161
BrandSick
HK$2,618.07
單位
Block Background Suppression 25 → 300 mm NPN Cable - - - 30V 4-Wire Red Light IP66, IP67 100 mA -
RS庫存編號 786-5927
製造零件編號WT24-2B410
BrandSick
HK$3,131.22
單位
Block Background Suppression 100 → 2500 mm NPN/PNP 4-Pin M12 Connector - - - 30V - Infrared IP69K 100 mA -
RS庫存編號 857-7517
製造零件編號EO1804PPAS-1
HK$1,260.19
單位
Barrel Diffuse 400 mm PNP 4-Pin M12 Connector - - - 40V - LED IP67 20 mA -
RS庫存編號 405-7280
製造零件編號T30SP6RQ
BrandBanner
HK$803.62
單位
Barrel Through Beam (Receiver) 60 m PNP M12 Connector - - - 30V - Infrared IP69K 150 mA -
全新
RS庫存編號 210-7837
製造零件編號OADM 20I5540/S14C
BrandBaumer
HK$13,790.94
單位
Rectangular Background Suppression 50 mm Analog PNP Connector M12 5 Pin - - - - - - - - -
全新
RS庫存編號 210-3922
製造零件編號WTB4S-3P3262V
BrandSick
HK$2,068.06
單位
Block Background Suppression 4 → 500 mm PNP Cable with M8 Male Connector - - - 30V 4-Pin Red Light IP66, IP67, IP68, IP69K 100 mA -
全新
RS庫存編號 210-3671
製造零件編號WTB8-P1111
BrandSick
HK$1,298.05
單位
Block Background Suppression 5 → 100 mm PNP Cable 2 m - - - 30V - Red Light IP67 100 mA -
全新
RS庫存編號 204-3999
BrandRS PRO
HK$288.61
單位
Barrel Through Beam (Emitter) 20 m PNP NO/NC 2m PVC Cable - - - 30V 2 m cable LED IP67 - -