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 Maximum AC Voltage Maximum DC Voltage Terminal Type Light Source IP Rating Maximum Current Interface Response Time Housing Material
RS庫存編號 818-1611
製造零件編號EE-SX674
BrandOmron
TWD739.00
單位
Fork Through Beam (Fork) Maximum of 5 mm NPN 4-Pin Connector - 24V Connector Infrared IP50 12 mA - - PBT
RS庫存編號 812-8153
製造零件編號CX-441
BrandPanasonic
TWD3,804.00
單位
Block Retroreflective 2 → 50 mm NPN 2m Cable - 24V - LED IP67 20 mA - 1 ms PBT
RS庫存編號 808-9171
製造零件編號CX-422
BrandPanasonic
TWD3,069.00
單位
Block Diffuse 800 mm NPN 2m Cable - 24V - Infrared IP67 100 mA - 1 ms PBT
RS庫存編號 194-4018
製造零件編號OPB608A
BrandOptek
TWD52.00
單位
Block Retroreflective 1.27 → 9.525 mm NPN - - - Wire Lead Infrared - - - - Plastic
RS庫存編號 808-9199
製造零件編號CX-442
BrandPanasonic
TWD3,792.00
單位
Block Diffuse 20 → 300 mm NPN 2m Cable - 24V - LED IP67 100 mA - 1 ms PBT
RS庫存編號 512-4656
製造零件編號XUK9ARCNL2
TWD2,490.00
單位
Compact Retroreflective 5 m Relay 5-Wire Cable 2m 240V 240V - LED IP65 3 A - <25 ms PBT
RS庫存編號 361-5510
製造零件編號EX-13A-PN
BrandPanasonic
TWD3,316.00
單位
Block Through Beam (Emitter and Receiver) 500 mm PNP 3-Wire Cable 2m - 24V - LED IP67 50 mA - <=0.5 ms PET
RS庫存編號 807-4557
製造零件編號EE-SV3
BrandOmron
TWD187.00
單位
Block Through Beam (Fork) - Phototransistor - 1.5V - PCB Pin - - 50 mA - 4 μs -
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製造零件編號EE-SPX403N
BrandOmron
TWD1,589.00
單位
Fork Through Beam (Fork) 13 mm NPN Non-Solder Connector - 24V - Infrared IP50 80 mA - - PC
RS庫存編號 125-4567
製造零件編號PM-Y65
BrandPanasonic
TWD596.00
單位
Fork Through Beam (Fork) 6 mm NPN 4-Pin Connector - 24V 4-Pin Connector Infrared IP40 50 (Sink Current) mA - 20 (Received) μs, 80 (Interrupted) μs PBT (Enclosure), Polycarbonate (Display Section)
RS庫存編號 808-9121
製造零件編號CX-411
BrandPanasonic
TWD3,058.00
單位
Block Through Beam (Emitter and Receiver) 10 m NPN 3-Wire Cable 2m - 24V - LED IP67 100 mA - 1 ms PBT
RS庫存編號 902-7177
製造零件編號BOS 21M-PA-RD10-S4
BrandBALLUFF
TWD6,024.00
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Block Diffuse 0.01 → 1 m PNP M12 Connector - 30V Connector LED IP67 100 mA - 1 ms Aluminium, GD-Zn
RS庫存編號 198-0553
製造零件編號E3SGS3E4
BrandOmron
TWD7,208.00
單位
Fork Through Beam (Fork) 30 mm NPN Pre-Wired Cable - 24V - Infrared IP67 80 mA - 1 ms Metal
RS庫存編號 778-8707
製造零件編號E3JK-DR11 2M
BrandOmron
TWD3,358.00
單位
Block Diffuse 2.5 m Relay 5-Wire Cable 2m 240V 240V Wire Lead LED IP64 - - 20 ms ABS
RS庫存編號 361-5554
製造零件編號EX-14A-PN
BrandPanasonic
TWD3,342.00
單位
Block Retroreflective 2 → 25 mm PNP 3-Wire Cable 2m - 24V - LED IP67 50 mA - <=0.5 ms PET
RS庫存編號 818-1548
製造零件編號E3JM-R4M4-US
BrandOmron
TWD4,629.00
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製造零件編號EE-SPY411
BrandOmron
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製造零件編號OPB704
BrandOptek
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製造零件編號NX5-D700A
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BrandOmron
TWD897.00
單位
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