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 812-8213
製造零件編號CY-192A-P-Z-Y
BrandPanasonic
HK$301.53
單位
Barrel Retroreflective 4 m PNP M12 Connector - - - 24V - Infrared IP67 35 mA -
RS庫存編號 289-2491
製造零件編號WL150-P430
BrandSick
HK$1,228.63
單位
Block Retro-Reflective 2.4 m PNP 4-Pin M8 Connector - - - 30V - LED IP67 100 mA -
RS庫存編號 458-834
製造零件編號WTB12-3P1111
BrandSick
HK$2,413.65
單位
- - - PNP - - - - - - LED IP66, IP67, IP69 - -
RS庫存編號 111-3700
製造零件編號WLG4SC-3P2232A71
BrandSick
HK$1,859.22
單位
Block Retroreflective 0 → 5 m PNP 4-Pin M8 Connector - - IO-LINK 30V 4-Pin M8 Connector LED IP66, IP67 100 mA IO-Link
RS庫存編號 609-9062
製造零件編號EQ511T
BrandPanasonic
HK$1,375.86
單位
Block Diffuse 0.1 → 2.5 m PNP 4-Terminal Screw - - - 24V Screw Infrared IP67 100 mA -
RS庫存編號 821-0044
製造零件編號E3Z-G62-M3J
BrandOmron
HK$1,336.86
單位
Fork Through Beam (Fork) 25 mm NPN Pre-Wired Cable - - - 24V 4-Pin Connector Infrared IP64 25 mA -
RS庫存編號 198-0553
製造零件編號E3SGS3E4
BrandOmron
HK$2,196.91
單位
Fork Through Beam (Fork) 30 mm NPN Pre-Wired Cable - - - 24V - Infrared IP67 80 mA -
RS庫存編號 778-8713
製造零件編號E3JK-RR12 2M
BrandOmron
HK$932.08
單位
Block Retro-Reflective 6 m, 100 mm Relay Cable - 240V - 240V Wire Lead LED IP64 - -
RS庫存編號 818-1738
製造零件編號EE-SX672-WR 1M
BrandOmron
HK$258.29
單位
Fork Through Beam (Fork) 5 mm NPN - - - - 24V Pre-Wired Infrared IP50 35 mA -
RS庫存編號 121-2725
製造零件編號WTB8-P2131
BrandSick
HK$1,248.63
單位
Block Background Suppression 30 → 300 mm PNP 3-Pin M8 Connector - - - 30V M8 LED IP67 30 mA -
RS庫存編號 655-666
製造零件編號FZAM 30P5002
BrandBaumer
HK$2,539.68
單位
Barrel Diffuse 300 → 1500 mm PNP 4-Wire Cable 2m - - - 30V - Infrared IP65 100 mA -
RS庫存編號 847-0331
製造零件編號13104RQD07
BrandEaton
HK$1,064.35
單位
Block Diffuse 5 mm NPN/PNP 4-Pin Connector - - - 30V - LED IP69K 250 mA -
RS庫存編號 919-6589
製造零件編號WT14-2P422
BrandSick
HK$1,398.05
單位
Block Background Suppression 80 → 500 mm PNP 4-Pin M12 Connector - - - 30V M12 LED IP67 30 mA -
RS庫存編號 729-5107
BrandRS PRO
HK$636.78
單位
Barrel Background Suppression 1 → 140 mm PNP Cable - - - 30V - LED IP67 100 mA -
RS庫存編號 768-5986
製造零件編號E3FABP112M
BrandOmron
HK$870.59
單位
Barrel Clear Object Detection 100 → 500 mm PNP Pre-Wired Cable - - - 30V - LED IP67, IP69K 25 mA -
RS庫存編號 807-4560
製造零件編號EE-SH3
BrandOmron
HK$40.90
單位
Block Through Beam (Fork) - Phototransistor - - 1.5V - - PCB Pin - - 50 mA -
RS庫存編號 450-2948
製造零件編號OBT200-18GM60-E5
HK$946.04
單位
Barrel Diffuse 200 mm PNP 4-Wire Cable 2m - - - 30V - Infrared IP67 100 mA -
RS庫存編號 820-9987
製造零件編號E3S-AD86
BrandOmron
HK$2,630.59
單位
Block Diffuse 10 → 200 mm PNP M12 Connector - - - 30V 4-Pin Connector LED IP67 30 mA -
RS庫存編號 701-8803
製造零件編號WLG4S-3P2232V
BrandSick
HK$2,053.45
單位
Block Retroreflective 5 m PNP 4-Pin M8 Connector - - - 30V - LED IP69K 100 mA -
RS庫存編號 878-7948
製造零件編號XUK1ARCNL2H60
HK$1,418.49
單位
Compact Retroreflective 10 m Relay 5-Wire Cable 2m - 240V - 240V Cable LED IP65 3 A -