Photoelectric Sensors

pPhotoelectric 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./p ph2Through-beam Sensors/h2/p pThrough-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./p ph2Retro-reflective Sensors/h2/p pRetro-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./p ph2Diffuse Sensors/h2/p pDiffuse 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./p pA 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./p

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Description Price Sensor Style Detection Type Detection Range Output Type Electrical Connection Maximum AC Voltage Maximum DC Voltage Terminal Type Light Source IP Rating Maximum Current Interface Response Time Housing Material
RS Stock No. 530-0951
Mfr. Part No.WTB4-3P1361
BrandSick
HK$1,474.81
Each
units
Block Diffuse 4 → 150 mm PNP 3-Wire Cable 2m - 30V - LED IP66, IP67 100 mA - <0.5 ms Bayblend, PMMA
RS Stock No. 175-7835
Mfr. Part No.Q4XFPLAF310-Q8
BrandBanner
HK$3,268.92
Each
units
Block Distance 35 → 310 mm PNP 4-Pin M12 Connector - 30V M12 Connector LED IP67, IP68, IP69K 100 mA - 1.5 ms Stainless Steel
RS Stock No. 822-4617
Mfr. Part No.E3S-LS3N 2M
BrandOmron
HK$1,532.52
Each
units
Block Diffuse 20 → 35 mm NPN Pre-Wired Cable - 24V - LED IP40 25 mA - - ABS
RS Stock No. 847-9362
Mfr. Part No.QS18VP6LLPQ5
BrandBanner
HK$1,575.18
Each
units
Barrel Retroreflective 0.1 → 10 m PNP 4-Pin M12 Connector - 30V - Laser Light IP67 <15 mA - 700 μs ABS
RS Stock No. 753-0387
Mfr. Part No.XUX5APANM12
HK$850.00
Each
units
Block Diffuse 2.1 m PNP 4-Pin M12 Connector - 24V - Infrared IP65, IP67 100 mA - <2 ms PBT
RS Stock No. 198-992
Mfr. Part No.XUB2APANL2R
HK$482.73
Each
units
Barrel Through Beam (Receiver) 15 m PNP Cable - 24V - Infrared IP65, IP67 100 mA - <1 ms PBT
RS Stock No. 786-5867
Mfr. Part No.WS/WE260-F470
BrandSick
HK$1,881.59
Each
units
Block Through Beam (Emitter and Receiver) 0 → 35 m PNP 4-Pin M12 Connector - 30V - LED IP67 100 mA - 0.5 ms ABS, Plastic
RS Stock No. 812-8153
Mfr. Part No.CX-441
BrandPanasonic
HK$1,081.12
Each
units
Block Retroreflective 2 → 50 mm NPN 2m Cable - 24V - LED IP67 20 mA - 1 ms PBT
RS Stock No. 891-6739
Mfr. Part No.LA31/115
HK$638.47
Each
units
Block Through Beam (Emitter) 0 → 30 (Effective) m, Maximum of 43 (Threshold) m Relay Cable 240V 240V - LED IP67 ≤20 mA - ≤25 ms PC
RS Stock No. 847-9331
Mfr. Part No.QS18VP6LAF250
BrandBanner
HK$2,891.97
Each
units
Block Diffuse 20 → 250 mm PNP Cable - 30V - Laser Light IP67 <15 mA - 700 μs ABS
RS Stock No. 136-5795
Mfr. Part No.OR18.ZL-PV1P.7BO/B013
BrandBaumer
HK$1,517.32
Each
units
Barrel Diffuse 10 → 300 mm PNP 4-Pin M12 Connector - 30V Threaded Laser Light IP67 45 (No Load) mA - <0.34 ms Brass
RS Stock No. 763-7892
Mfr. Part No.VL18-3N3140
BrandSick
HK$880.63
Each
units
Barrel Retroreflective 0.05 → 3.7 m NPN 4-Pin M12 Connector - 30V - LED IP67 100 mA - <=2 ms Nickel Plated Brass
RS Stock No. 812-8162
Mfr. Part No.CX-441-P-Z
BrandPanasonic
HK$1,138.02
Each
units
Block Retroreflective 2 → 50 mm PNP 4-Pin M8 Connector - 24V - LED IP67 20 mA - 1 ms PBT
RS Stock No. 510-3104
Mfr. Part No.ML7-8-200/25/102/115
HK$1,041.65
Each
units
Block Diffuse 20 → 200 mm NPN Cable - 30V - LED IP69K 100 mA - 0.5 ms PC
RS Stock No. 818-1683
Mfr. Part No.E3S-AD81
BrandOmron
HK$1,477.54
Each
units
Block Diffuse 10 → 200 mm PNP - - 30V Pre-Wired LED IP67 100 mA - 0.5 ms PBT
RS Stock No. 187-1809
Mfr. Part No.O200.RR-GD1E.72NV/T003
BrandBaumer
HK$965.60
Each
units
Rectangular Retro-Reflective 4 m Push Pull 4 Pin M8 Connector - 30V M8 Connector - IP67 <50 (Output) mA - <0.5 ms Plastic
RS Stock No. 775-4240
Mfr. Part No.E3FBDN21
BrandOmron
HK$586.30
Each
units
Barrel Diffuse 100 mm NPN 4-Pin M12 Connector - 30V - LED IP67, IP69K 25 mA - 0.5 ms Nickel Plated Brass
RS Stock No. 768-5891
Mfr. Part No.E3FARP22
BrandOmron
HK$515.22
Each
units
Barrel Retroreflective 0 → 500 mm PNP 4-Pin M12 Connector - 30V - LED IP67, IP69K 25 mA - 0.5 ms ABS
RS Stock No. 125-4546
Mfr. Part No.PM-L45-P-C3
BrandPanasonic
HK$253.47
Each
units
Fork Through Beam (Fork) 6 mm PNP 3m Cable - 24V Cable Infrared IP64 50 (Source Current) mA - 20 (Received) μs, 80 (Interrupted) μs PBT (Enclosure), Polycarbonate (Display Section)
RS Stock No. 860-1989
Mfr. Part No.SME312LPCQD
BrandBanner
HK$1,657.56
Each
units
Block Retroreflective Maximum of 2 m NPN/PNP M12 Connector - 30V M12 LED IP67 45 mA - 500 (Dark) μs, 500 (Light) μs PBT
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