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, these are: through beam, retro-reflective and diffuse. The basic function of each is to detect the presence or absence of objects, or measure distance to the object.
Through beam Sensors
Through beam sensors 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 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 reflect materials is different to that from the reflector.
Diffuse Sensors
Diffuse sensors 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.

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Description Price Sensor Style Detection Type Detection Range Output Type Electrical Connection Maximum AC Voltage Maximum DC Voltage Optical Technology Terminal Type Light Source IP Rating Maximum Current Interface Response Time
RS Stock No. 219-2296
Mfr. Part No.EE-SX672
BrandOmron
$48.71
Each
units
Fork Through Beam (Fork) 5 mm NPN Connector - 24V Phototransistor - Infrared LED IP50 100 mA - -
RS Stock No. 739-6673
Mfr. Part No.O1D100
$1,061.14
Each
units
Block Diffuse 0.2 → 10 m Analogue, PNP M12 Connector - 30V Laser, Phototransistor - Laser Light IP67 200 mA - -
RS Stock No. 768-5888
Mfr. Part No.E3FARP112M
BrandOmron
$114.02
Each
units
Barrel Retro-Reflective 0.1 → 4 m PNP-NO/NC 4-Wire Cable 2m - 30V Phototransistor - Red LED IP67, IP69K 25 mA - 0.5 ms
RS Stock No. 288-9776
Mfr. Part No.WT150-P430
BrandSick
$205.57
Each
units
Block Diffuse 10 → 250 mm PNP-NO/NC 4-Pin M8 Connector - 30V Phototransistor - LED IP67 100 mA - <=0.5 ms
RS Stock No. 842-8582
Mfr. Part No.WL2S-2F1330
BrandSick
$234.28
Each
units
Block Retro-Reflective 0 → 1.2 m PNP Cable - 30V Visible Red LED - LED IP67 20 mA - ≤0.5 ms
RS Stock No. 218-989
Mfr. Part No.WT100L-F2241
BrandSick
$304.28
Each
units
Block Diffuse 450 mm PNP-NO/NC 4-Pin M8 Connector - 30V Laser, Phototransistor - Laser Light IP65 100 mA - <0.25 ms
RS Stock No. 444-3619
Mfr. Part No.XUX0ARCTT16
$595.10
Each
units
Long Distance Diffuse, Retro-Reflective, Through Beam (Receiver) 1.3 m, 2 m, 11 m, 40 m Relay Screw Clamp 240V 240V - - Infrared LED IP65, IP67 3 A, 500 mA - <25 ms
RS Stock No. 909-2887
Mfr. Part No.Q4XTULAF300-Q8
BrandBanner
$892.80
Each
units
Barrel Diffuse 25 → 300 mm Bipolar NPN/PNP M12 Connector - 30V Laser M12 Laser Light IP67, IP68, IP69K - - 50 ms
RS Stock No. 219-2280
Mfr. Part No.EE-SX671OMC
BrandOmron
$52.86
Each
units
Fork Through Beam (Fork) 5 mm NPN Connector - 24V Phototransistor - Infrared LED IP50 100 mA - -
RS Stock No. 786-5918
Mfr. Part No.WL12L-2B530
BrandSick
$1,041.34
Each
units
Block Retro-Reflective 0 → 18 m NPN & PNP-NC\NO 5-Pin M12 Connector - 30V Phototransistor - Laser Light IP67, IP69K 100 mA - ≤200 μs
RS Stock No. 859-3005
Mfr. Part No.S142ARNN924
$493.69
Each
units
Block - - NPN-NO/NC - 24V 24V - - LED IP20 - - 20 (ON) ms, 30 (OFF) ms
RS Stock No. 289-2491
Mfr. Part No.WL150-P430
BrandSick
$216.38
Each
units
Block Retro-Reflective 2.4 m PNP 4-Pin M8 Connector - 30V Phototransistor - LED IP67 100 mA - <=0.5 ms
RS Stock No. 444-3445
Mfr. Part No.XUB0BPSNL2
$188.10
Each
units
Barrel Diffuse, Retro-Reflective, Through Beam (Receiver) 0.12 m, 0.3 m, 2 m, 15 m PNP-NO/NC 3-Wire Cable 2m - 24V Phototransistor - Infrared LED IP65, IP67 100 mA - <2 ms
RS Stock No. 358-7926
Mfr. Part No.WL260-R270
BrandSick
$273.86
Each
units
Block Retro-Reflective 0.01 → 15 m Relay Cable 240V 30V - - LED IP67 3 A - <=20 ms
RS Stock No. 768-5863
Mfr. Part No.E3FATP112M
BrandOmron
$163.39
Each
units
Barrel Through Beam (Emitter and Receiver) 20 m PNP 4-Wire Cable 2m - 30V Phototransistor - Red LED IP67, IP69K 40 mA - 0.5 ms
RS Stock No. 375-6302
Mfr. Part No.WT12L-2B510
BrandSick
$693.00
Each
units
Block Diffuse 20 → 50 mm PNP 5-Pin M12 Connector - 30V Laser, Phototransistor - Laser Light IP69K 100 mA - <=200 μs
RS Stock No. 775-4228
Mfr. Part No.E3FBRP21
BrandOmron
$112.27
Each
units
Barrel Retro-Reflective 0.1 → 4 m PNP 4-Pin M12 Connector - 30V Phototransistor - Red LED IP67, IP69K 25 mA - 0.5 ms
RS Stock No. 800-4031
Mfr. Part No.OD1-B100H50I14
BrandSick
$1,413.72
Each
units
Block Background Suppression 50 → 150 mm Analogue 4-Pin M8 Connector - 24V Laser - Laser Light IP67 20 mA - 2 ms, 4 ms, 8 ms, 16 ms
RS Stock No. 741-7635
Mfr. Part No.VL18-4P3140V
BrandSick
$216.38
Each
units
Barrel Retro-Reflective 0.1 → 5 m PNP 4-Pin M12 Connector - 30V Phototransistor - LED IP67, IP68, IP69K 100 mA - <=1 ms
RS Stock No. 784-6692
Mfr. Part No.DT50-P1123
BrandSick
$818.19
Each
units
Block Background Suppression 200 → 10000 mm Analogue 5-Pin M12 Connector - 30V Phototransistor - Laser Light IP65 100 mA - 20 ms, 30 ms
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