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. 701-8783
Mfr. Part No.WL4S-3F2130V
BrandSick
TWD6,000.00
Each
units
Block Retroreflective 4 m PNP 3-Pin M8 Connector - 30V - LED IP69K 100 mA - <0.5 ms Stainless Steel
RS Stock No. 763-7889
Mfr. Part No.VTF18-3F1412
BrandSick
TWD4,066.00
Each
units
Barrel, Elbow Background Suppression 3 → 100 mm PNP 3-Wire Cable 2m - 30V - Infrared IP67 100 mA - 2 ms Nickel Plated Brass
RS Stock No. 745-2186
Mfr. Part No.E3ZLS66
BrandOmron
TWD3,391.00
Each
units
Block Background Suppression 20 → 200 mm NPN M8 Connector - 24V - LED IP67 100 mA - 1 ms PBT
RS Stock No. 729-5117
BrandRS PRO
TWD3,017.00
Each
units
Barrel Retro-Reflective 0.05 → 7 m PNP Cable - 30V - LED IP67 100 mA - <=0.5 ms Nickel Plated Brass, PC
RS Stock No. 425-8411
Mfr. Part No.OJ5036
TWD6,488.00
Each
units
Block Retroreflective 8 m PNP M8 Connector - 30V - LED IP67 200 mA - - ABS
RS Stock No. 891-9501
Mfr. Part No.ML7-8-H-350-IR/59/65a/136/143
TWD6,519.00
Each
units
Block Background Suppression 10 → 350 mm Push Pull 4-Pin M8 Connector - 30V M8 Connector Infrared IP67, IP69K <20 mA - 2 ms PC
RS Stock No. 125-4533
Mfr. Part No.PM-R25-C3
BrandPanasonic
TWD921.00
Each
units
Fork Through Beam (Fork) 6 mm NPN 3m Cable - 24V Cable Infrared IP64 50 (Sink Current) mA - 20 (Received) μs, 80 (Interrupted) μs PBT (Enclosure), Polycarbonate (Display Section)
RS Stock No. 818-1576
Mfr. Part No.EE-SX670P
BrandOmron
TWD739.00
Each
units
Fork Through Beam (Fork) Maximum of 5 mm PNP 4-Pin Connector - 24V Connector Infrared IP50 12 mA - - PBT
RS Stock No. 170-0724
Mfr. Part No.OPB704W-Z
BrandOptek
TWD124.40
Each (In a Bag of 100)
units
Block Retroreflective 3.8 mm NPN 4-Wire Cable 0.61m - - - Infrared - - - - Plastic
RS Stock No. 814-0349
Mfr. Part No.OGP500
TWD4,587.00
Each
units
Barrel Retroreflective 0.03 → 5 m PNP M12 Connector - 36V 4-Pin LED IP67 20 mA - - Stainless Steel
RS Stock No. 814-0351
Mfr. Part No.O6H301
TWD4,583.00
Each
units
Block Diffuse 2 → 200 mm PNP M12 Connector - 30V Cable LED IP65, IP67, IP68, IP69 24 mA - - Stainless Steel
RS Stock No. 814-0355
Mfr. Part No.O6H303
TWD4,583.00
Each
units
Block Diffuse 2 → 200 mm PNP 4-Pin M8 Connector - 30V Cable LED IP65, IP67, IP68, IP69 22 mA - - Stainless Steel
RS Stock No. 265-9244
Mfr. Part No.T18SP6FF100
BrandBanner
TWD6,889.00
Each
units
Barrel Diffuse 100 mm PNP Cable - 30V - LED IP69K 150 mA - - PBT, Plastic
RS Stock No. 362-3892
Mfr. Part No.SME312DQD
BrandBanner
TWD7,493.00
Each
units
Block Diffuse 380 mm PNP 5-Pin M12 Connector - 30V - Infrared IP67 150 mA - >=500 μs Reinforced Thermoplastic PET
RS Stock No. 814-0358
Mfr. Part No.OGE500
TWD3,664.00
Each
units
Barrel Through Beam (Receiver) Maximum of 25 m PNP M12 Connector - 36V Wire Lead LED IP67 11 mA - - Stainless Steel
RS Stock No. 229-119
Mfr. Part No.GLV18-55/115/120
TWD2,189.00
Each
units
Barrel Retroreflective 4 m PNP 4-Wire Cable 2m - 30V - LED IP67 100 mA - <=1 ms PC
RS Stock No. 425-8130
Mfr. Part No.OJ5004
TWD4,330.00
Each
units
Block Retroreflective 2 m PNP M8 Connector - 30V - LED IP67 200 mA - - ABS
New
RS Stock No. 190-4220
Mfr. Part No.T18-2NAEL-2M
BrandBanner
TWD2,474.00
Each
units
Barrel Opposed 25 m - Cable - 30V Cable Red LED IP67, IP68, IP69K <16 mA - 1 (OFF) ms, 1.5 (ON) ms PBT Polyester
RS Stock No. 902-7004
Mfr. Part No.BOS R020K-PS-RX11-02
BrandBALLUFF
TWD4,721.00
Each
units
Block Through Beam (Emitter and Receiver) 0 → 2000 mm PNP Cable - - Cable LED IP67 - - - ABS
RS Stock No. 891-6732
Mfr. Part No.LK31/25/31/115
TWD3,637.00
Each
units
Block Through Beam (Receiver) 0 → 30 (Effective) m, Maximum of 43 (Threshold) m Relay Cable 240V 240V - LED IP67 ≤20 mA - ≤25 ms PC