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.

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 are capable of detecting 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 has to 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 back 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. A diffuse mode sensor with background suppression is less sensitive to the target colour. They can also use a visible red light or infrared light sources.


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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 542-5094
製造零件編號FHDK 07P 6901 KS35A
BrandBaumer
HK$1,486.07
單位
Block Diffuse 10 → 60 mm PNP 4-Pin M8 Connector - - - 30V - LED IP65 100 mA -
RS庫存編號 815-4174
製造零件編號O300.GP-11110415
BrandBaumer
HK$1,494.52
單位
Block Diffuse 30 → 200 mm Push Pull 4-Pin M8 Connector - - - 30V Cable LED IP67 45 mA -
RS庫存編號 418-5672
製造零件編號OZDK 10P5101/S35A
BrandBaumer
HK$3,695.12
單位
Block Diffuse 3 → 150 mm PNP 4-Pin M8 Connector - - - 30V - Laser Light IP67 100 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 399-1959
製造零件編號FPDK14P5101/S35A
BrandBaumer
HK$1,008.28
單位
Block Retroreflective 7.2 m PNP 4-Pin M8 Connector - - - 30V - LED IP67 100 mA -
全新
RS庫存編號 210-0650
製造零件編號FHDK 10P5160/S35A
BrandBaumer
HK$2,631.20
單位
Rectangular Diffuse 30 mm PNP Connector M8 4 Pin - - - - - - - - -
RS庫存編號 446-0282
製造零件編號OHDK 14P5101/S35A
BrandBaumer
HK$3,454.88
單位
Block Diffuse 20 → 350 mm PNP 4-Pin M8 Connector - - - 30V - Laser Light IP67 100 mA -
RS庫存編號 176-9035
製造零件編號O300.RL-GW1J.72N
BrandBaumer
HK$1,846.04
單位
Block Retroreflective 6 m - 4-Pin M8 Connector - - - 30V Connector LED IP67 100 mA -
全新
RS庫存編號 210-0705
製造零件編號O200.SL.T-GW1J.72NV/F160
BrandBaumer
HK$2,002.00
單位
Rectangular Light Barrier 180 mm Push Pull Flylead Connector M8 4 Pin - - - - - - - - -
全新
RS庫存編號 210-0698
製造零件編號O200.EL-GW1J.72NV/FREC
BrandBaumer
HK$1,681.68
單位
Rectangular Through Beam 6 mm Push Pull Flylead Connector M8 4 Pin - - - - - - - - -
RS庫存編號 136-5793
製造零件編號OR18.ZI-PW1P.71O/B005
BrandBaumer
HK$395.36
單位
Barrel Diffuse 0 → 800 mm PNP 4-Pin M12 Connector - - - 30V Threaded Infrared IP67 40 mA -
RS庫存編號 136-5795
製造零件編號OR18.ZL-PV1P.7BO/B013
BrandBaumer
HK$1,459.78
單位
Barrel Diffuse 10 → 300 mm PNP 4-Pin M12 Connector - - - 30V Threaded Laser Light IP67 35 mA -
全新
RS庫存編號 210-0706
製造零件編號O200.SL-GW1J.72NV/F160
BrandBaumer
HK$1,727.44
單位
Rectangular Light Barrier 180 mm Push Pull Flylead Connector M8 4 Pin - - - - - - - - -
RS庫存編號 542-5195
製造零件編號FGUM 120P 8001 S35L
BrandBaumer
HK$2,170.85
單位
Fork Through Beam (Fork) 120 mm PNP 3-Pin M8 Connector - - - 35V - LED IP67 200 mA -
RS庫存編號 667-0576
製造零件編號OHDK 14P5101/S14
BrandBaumer
HK$3,178.49
單位
Block Diffuse 20 → 350 mm PNP 4-Pin M12 Connector - - - 30V - Laser Light IP67 100 mA -
全新
RS庫存編號 210-0647
製造零件編號FHCK 07P6901/KS35A
BrandBaumer
HK$2,082.08
單位
Rectangular Diffuse 60 mm PNP Flylead Connector M8 4 Pin - - - - - - - - -
RS庫存編號 136-5794
製造零件編號OR18.ZI-PW1P.71O/B013
BrandBaumer
HK$395.36
單位
Barrel Diffuse 0 → 300 mm PNP 4-Pin M12 Connector - - - 30V Threaded Infrared IP67 40 mA -
全新
RS庫存編號 210-7839
製造零件編號OADM 20I5570/S14C
BrandBaumer
HK$13,567.84
單位
Rectangular Background Suppression 250 mm Analog PNP Connector M12 5 Pin - - - - - - - - -
RS庫存編號 542-5139
製造零件編號FHDK 20P 6901 S35A
BrandBaumer
HK$1,497.04
單位
Block Diffuse 30 → 200 mm PNP 4-Pin M8 Connector - - - 30V - LED IP67 100 mA -
RS庫存編號 338-9996
製造零件編號FZAM 18P1155
BrandBaumer
HK$1,041.04
單位
Barrel Diffuse 20 → 150 mm PNP 3-Wire Cable 2m - - - 30V - Infrared IP65 200 mA -