Reflective Optical Sensors

Reflective optical sensors are photoelectrical sensors that are used to detect the presence or absence of objects, or measure the distance to those objects. They are a non-contact type of sensor, often used in the automation industry. They can be used to provide real-time information in a manufacturing setting in order to keep processes running smoothly.

How do reflective optical sensors work?

A reflector is positioned opposite the light sensor, and a light beam is passed back and forth between the two. When an object is present, the beam is interrupted, and the sensor will send an electrical signal to the output device.

In some cases, polarising filters may be needed if the objects being detected are themselves reflective. These allow the sensor to tell the difference between light reflected by the reflector and the object.

Advantages of using reflective optical sensors

The advantage of using a reflective optical sensor over a through beam sensor is that they are much easier and less time consuming to install. This is because the transmitter and receiver are housed within the same body.


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Description Price Peak Sensor Distance Output Device Typical Rise Time Typical Fall Time Number of Channels Number of Pins Mounting Type Package Type Dimensions Height Length Maximum Operating Temperature Minimum Operating Temperature Width
RS Stock No. 146-0786
Mfr. Part No.GP2Y0A51SK0F
BrandSharp
HK$74.21
Each
units
15cm - - - - - Surface Mount - 27 x 13.2 x 12mm 12mm 27mm +60°C -10°C 13.2mm
RS Stock No. 178-5030
Mfr. Part No.GP1A57HRJ00F
BrandSharp
HK$16.48
Each (In a Bag of 100)
units
- Transistor 0.5µs 0.5µs 1 5 Through Hole OPIC 18.6 x 15.2 x 5mm 5mm 18.6mm +85°C -25°C 15.2mm
RS Stock No. 170-9658
Mfr. Part No.SFH 9206-6/7
HK$4.429
Each (On a Reel of 1000)
units
1 → 5mm Phototransistor 30µs 40µs - 6 Surface Mount - 4.2 x 3.4 x 2.1mm 2.1mm 4.2mm +100°C -40°C 3.4mm
RS Stock No. 124-6801
Mfr. Part No.RPR-220UC30N
BrandROHM
HK$16.102
Each (In a Pack of 5)
units
6mm Phototransistor 10µs 10µs 1 4 Through Hole Radial 6.4 x 4.9 x 6.5mm 6.5mm 6.4mm +85°C -25°C 4.9mm
RS Stock No. 165-7087
Mfr. Part No.TCND5000
BrandVishay
HK$9.867
Each (On a Reel of 2000)
units
6mm Photodiode 800ns 800ns 1 4 Surface Mount - 6 x 3.7 x 3.75mm - - +85°C -40°C -
RS Stock No. 146-0725
Mfr. Part No.GP2A25J0000F
BrandSharp
HK$31.374
Each (In a Bag of 100)
units
9 (Detection) mm, 27 (Non-Detection) mm Photointerrupter - - - - Surface Mount - 39.8 x 9 x 8.65mm 8.65mm 39.8mm +60°C -10°C 9mm
RS Stock No. 170-0731
Mfr. Part No.OPB720B-30VZ
BrandOptek
HK$194.433
Each (In a Bag of 25)
units
762mm Open Collector - - 1 3 - - 17.15 x 8.38 x 27.94mm 27.94mm 17.15mm +70°C 0°C 8.38mm
RS Stock No. 455-0931
Mfr. Part No.OPB702
BrandOptek
HK$26.00
Each
units
3.81mm Phototransistor - - 1 4 Through Hole - 17.78 x 4.78 x 8.89mm 8.89mm 17.78mm +85°C -40°C 4.78mm
RS Stock No. 146-0784
Mfr. Part No.GP2A25NJJ00F
BrandSharp
HK$53.185
Each (In a Pack of 2)
units
9 (Detection) mm, 27 (Non-Detection) mm Photointerrupter - - - - Surface Mount - 39.8 x 9 x 8.65mm 8.65mm 39.8mm +60°C -10°C 9mm
RS Stock No. 616-5709
Mfr. Part No.KRC011
BrandKingbright
HK$4.576
Each (In a Pack of 5)
units
- - - - - - - - - - - +50°C -25°C -
RS Stock No. 161-2156
Mfr. Part No.VCNT2020
BrandVishay
HK$4.408
Each (In a Pack of 10)
units
2.5mm Phototransistor 10µs 15µs - 4 Surface Mount SMD 2.5 x 2 x 0.8mm 0.8mm 2.5mm 85°C -25°C 2mm
RS Stock No. 915-4926
Mfr. Part No.SFH 9206-6/7
HK$7.921
Each (In a Pack of 10)
units
1 → 5mm Phototransistor 30µs 40µs - 6 Surface Mount - 4.2 x 3.4 x 2.1mm 2.1mm 4.2mm +100°C -40°C 3.4mm
RS Stock No. 146-0730
Mfr. Part No.GP2A28AJ000F
BrandSharp
HK$33.726
Each (In a Bag of 100)
units
9 (Detection) mm, 27 (Non-Detection) mm Photointerrupter - - - - Surface Mount - 26.8 x 9 x 8mm 8mm 26.8mm +60°C -10°C 9mm
RS Stock No. 146-0741
Mfr. Part No.GP2Y1012AU0F
BrandSharp
HK$79.66
Each (In a Tray of 50)
units
- - - - - - Surface Mount - 46 x 34 x 17.6mm 17.6mm 46mm +65°C -10°C 34mm
RS Stock No. 124-6800
Mfr. Part No.RPR-220
BrandROHM
HK$9.785
Each (In a Pack of 10)
units
6mm Phototransistor 10µs 10µs 1 4 Through Hole Radial 6.4 x 4.9 x 6.5mm 6.5mm 6.4mm +85°C -25°C 4.9mm
RS Stock No. 170-0777
Mfr. Part No.OPB702
BrandOptek
HK$25.472
Each (In a Bag of 25)
units
3.81mm Phototransistor - - 1 4 Through Hole - 17.78 x 4.78 x 8.89mm 8.89mm 17.78mm +85°C -40°C 4.78mm
RS Stock No. 826-4640
Mfr. Part No.GP1A57HRJ00F
BrandSharp
HK$27.408
Each (In a Pack of 5)
units
- Transistor 0.5µs 0.5µs 1 5 Through Hole OPIC 18.6 x 15.2 x 5mm 5mm 18.6mm +85°C -25°C 15.2mm
RS Stock No. 170-0783
Mfr. Part No.OPB350W250Z
BrandOptek
HK$61.604
Each (In a Bag of 25)
units
6.35mm Phototransistor - - 1 4 Screw Mount - 29.59 x 7.62 x 13.34mm 13.34mm 29.59mm +85°C -40°C 7.62mm
RS Stock No. 146-0729
Mfr. Part No.GP2A25DJ000F
BrandSharp
HK$35.021
Each (In a Bag of 100)
units
9 (Detection) mm, 27 (Non-Detection) mm Photointerrupter - - - - Surface Mount - 39.8 x 9 x 8.65mm 8.65mm 39.8mm +60°C -10°C 9mm
RS Stock No. 666-6570
Mfr. Part No.GP2Y0D21YK0F
BrandSharp
HK$79.94
Each
units
- - - - - - - - - - - +60°C -10°C -
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