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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รายละเอียดสินค้า / Description ราคา / Price Sensor Style Detection Type Detection Range Output Type Electrical Connection Maximum AC Voltage Communication Protocol Maximum DC Voltage Terminal Type Light Source IP Rating Maximum Current Interface Response Time
RS Stock No. 778-8713
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.E3JK-RR12 2M
Brand :Omron
THB3,257.00
Each
Units
Block Retro-Reflective 6 m, 100 mm Relay Cable 240V - 240V Wire Lead LED IP64 - - 20 ms
RS Stock No. 786-5873
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.WT34-R220
Brand :Sick
THB8,648.00
Each
Units
Block Background Suppression 100 → 2500 mm Relay 5-Terminal Screw - - 240V - Infrared IP67 4 A - 10 ms
RS Stock No. 444-3530
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.XUK0AKSAM12
THB4,569.81
Each
Units
Compact Through Beam (Emitter) 0.28 m, 0.8 m, 4 m, 30 m PNP 4-Pin M12 Connector - - 24V - Infrared IP65 100 mA - <2 ms
RS Stock No. 818-1517
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.EE-SPX302-W2A
Brand :Omron
THB2,467.19
Each
Units
- - - NPN - - - - - GaAs Infrared LED IP50 - - -
RS Stock No. 786-5918
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.WL12L-2B530
Brand :Sick
THB17,725.06
Each
Units
Block Retroreflective 0 → 18 m NPN/PNP 5-Pin M12 Connector - - 30V - Laser Light IP67, IP69K 100 mA - 200 μs
RS Stock No. 530-0866
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.WTB27-3P2411
Brand :Sick
THB8,911.20
Each
Units
Block Diffuse 30 → 1600 mm PNP 4-Pin M12 Connector - - 30V - Infrared IP69K 100 mA - <=1.5 ms
RS Stock No. 695-6820
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.XUB4BPANM12
THB2,357.53
Each
Units
Barrel Diffuse 0.1 m PNP 4-Pin M12 Connector - - 24V - Infrared IP65, IP67 100 mA - <1 ms
RS Stock No. 778-8707
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.E3JK-DR11 2M
Brand :Omron
THB3,321.82
Each
Units
Block Diffuse 2.5 m Relay 5-Wire Cable 2m 240V - 240V Wire Lead LED IP64 - - 20 ms
RS Stock No. 891-9514
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.RLK31-8-2500-IR/31/115
THB2,442.81
Each
Units
Block Diffuse 0 → 2.5 m Relay 5-Wire Cable 2m 240V - 240V - Infrared IP67 40 mA - <25 ms
RS Stock No. 374-3788
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.E3Z-D87
Brand :Omron
THB3,852.13
Each
Units
Block Diffuse 1 m PNP 4-Pin M8 Connector - - 26.4V - Infrared IP69K 100 mA - 1 ms
RS Stock No. 374-2050
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.E3ZD812M
Brand :Omron
THB4,138.51
Each
Units
Block Diffuse 5 → 100 mm PNP 3-Wire Cable 2m - - 26.4V - Infrared IP69K 100 mA - 1 ms
RS Stock No. 786-5851
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.WL260-S270
Brand :Sick
THB5,188.80
Each
Units
Block Retroreflective 0.01 → 15 m Relay 5-Terminal Screw 240V - 240V - LED IP67 3 A - 20 ms
RS Stock No. 288-9805
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.WT150-P460
Brand :Sick
THB5,113.60
Each
Units
Block Diffuse 2 → 100 mm PNP 4-Pin M8 Connector - - 30V - LED IP67 100 mA - <=0.5 ms
RS Stock No. 372-8155
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.E3ZD622M
Brand :Omron
THB3,947.47
Each
Units
Block Diffuse 1 m NPN 3-Wire Cable 2m - - 26.4V - Infrared IP69K 100 mA - 1 ms
RS Stock No. 714-1644
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.ML100-8-H-350-RT/95/103
THB4,566.36
Each
Units
Block Diffuse 5 → 350 mm PNP 4-Pin M8 Connector - - 30V - LED IP67 100 mA - 1 ms
RS Stock No. 176-9850
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.QS18VN6FF50
Brand :Banner
THB4,079.44
Each
Units
Block Through Beam 50 mm NPN Cable - - 30V Cable LED IP67 - - 850 μs
RS Stock No. 218-951
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.WL100L-F1131
Brand :Sick
THB5,482.39
Each
Units
Block Retroreflective 0.08 → 12 m PNP Cable - - 30V - Laser Light IP65 100 mA - <0.25 ms
RS Stock No. 847-9164
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.QS18VN6D
Brand :Banner
THB2,220.17
Each
Units
Barrel Diffuse 450 mm NPN Cable - - 30V - LED IP67 25 mA - 600 μs
RS Stock No. 778-8716
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.E3JK-TR11 2M
Brand :Omron
THB4,611.86
Each
Units
Block Through Beam (Emitter and Receiver) 40 m Relay 5-Wire Cable 2m 240V - 240V Wire Lead LED IP64 - - 20 ms
RS Stock No. 493-7316
หมายเลขชิ้นส่วนของผู้ผลิต / Mfr. Part No.WF2-40B410
Brand :Sick
THB5,715.20
Each
Units
Fork Through Beam (Fork) 2 mm NPN/PNP 4-Pin M8 Connector - - 30V - Infrared IP65 100 mA - 100 μs