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 786-5863
製造零件編號WT260-S270
BrandSick
HK$1,641.31
單位
Block Background Suppression 5 → 1700 mm Relay M12 Connector - - - 240V - LED IP67 3 A -
RS庫存編號 615-9316
製造零件編號E3T-SR22
BrandOmron
HK$1,263.57
單位
Block Retroreflective 10 → 200 mm NPN Pre-Wired Cable - - - 26.4V - LED IP67 50 mA -
RS庫存編號 405-7195
製造零件編號SLC1BB6Q
BrandBanner
HK$9,873.65
單位
Block - 30.5 mm PNP 5-Pin M12 Connector - - - 30V - LED IP67 150 mA -
全新
RS庫存編號 212-3130
製造零件編號GRTE18S-F2349
BrandSick
HK$538.96
單位
Cylindrical Energetic 5 → 550 mm Dark Switching, PNP Connector M12 Dark Switching - - 30V 3-Pin - IP67 100 mA -
RS庫存編號 205-5140
製造零件編號VL180-2P41131
BrandSick
HK$791.99
單位
Barrel Retro Reflective 7 m PNP Cable - - - 30V 4-pin LED IP67 - -
RS庫存編號 205-5198
製造零件編號WL9-3P2262
BrandSick
HK$1,397.00
單位
Rectangular Retro Reflective 400 mm PNP Connector M8 - - - 30V 4-pin LED IP66, IP67, IP69K - -
全新
RS庫存編號 212-3225
製造零件編號VTE18-4N2240
BrandSick
HK$929.43
單位
Cylindrical Energetic 3 → 200 mm Light/ Dark Switching, NPN Male Connector M12 - - - 30V 4-Pin - IP67 100 mA -
RS庫存編號 695-6836
製造零件編號XUK1APANM12
HK$718.70
單位
Compact Retroreflective 7 m PNP 4-Pin M12 Connector - - - 24V - Infrared IP65 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 -
全新
RS庫存編號 215-0535
製造零件編號E3AS-HL150MT 2M
BrandOmron
HK$3,414.84
單位
- Background Suppression 35 → 150 mm PNP Pre-Wired - - IO-LINK - - - - - -
RS庫存編號 741-7613
製造零件編號VTE18-4P4240V
BrandSick
HK$1,047.81
單位
Barrel Diffuse 450 mm PNP 4-Pin M12 Connector - - - 30V - Infrared IP67, IP68, IP69K 100 mA -
RS庫存編號 847-9407
製造零件編號QS18VP6R
BrandBanner
HK$835.92
單位
Barrel Through Beam (Receiver) 20 m PNP Cable - - - 30V - LED IP67 25 mA -
RS庫存編號 189-2157
製造零件編號XUM2APSBL2
HK$1,081.41
單位
Miniature Through Beam 15 m PNP Cable - - - 24 V, 26.4 V Cable LED IP67 25 mA -
RS庫存編號 193-8359
製造零件編號E3AS-L80MN M3
BrandOmron
HK$1,639.75
單位
Compact Reflective 10 → 80 mm NPN M8 Connector - - IO-LINK 30V M8 Connector LED IP67, IP67G, IP69K 35 mA IO-Link
RS庫存編號 219-2303
製造零件編號EE-SX673
BrandOmron
HK$203.41
單位
Fork Through Beam (Fork) 5 mm NPN Connector - - - 24V - Infrared IP50 100 mA -
全新
RS庫存編號 210-3885
製造零件編號WTB4S-3F2161
BrandSick
HK$1,363.98
單位
Block Background Suppression 4 → 180 mm PNP Connector M8 - - - 30V 3-Pin Red Light IP66, IP67 100 mA -
全新
RS庫存編號 210-3973
製造零件編號GTB10-R3811
BrandSick
HK$1,628.05
單位
Block Background Suppression 20 → 950 mm Relay Cable - 240V - 240V 5-Wire Red Light IP67 3 A -
全新
RS庫存編號 212-2889
製造零件編號GSE10-P4212
BrandSick
HK$1,155.02
單位
Block Through-Beam 0 → 40000 mm Light/Dark switching, PNP Connector M12 - - - 30V 4-Pin Polarized Red Light IP67 100 mA -
RS庫存編號 764-3859
製造零件編號SM312LVQD
BrandBanner
HK$1,891.84
單位
Block Retroreflective 5 m NPN/PNP 4-Pin Connector - - - 30V - LED IP67 150 mA -
全新
RS庫存編號 202-4436
BrandRS PRO
HK$462.57
單位
Block Diffuse Reflection 300 mm PNP NO/NC M8 connector - - - - M8 - - - -