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. 178-7438
Mfr. Part No.GP2Y0A41SK0F
BrandSharp
£4.684
Each (In a Tray of 1000)
Units
300mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 666-6568
Mfr. Part No.GP2Y0A41SK0F
BrandSharp
£7.80
Each
Units
300mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 178-7429
Mfr. Part No.GP2Y0A710K0F
BrandSharp
£10.80
Each (In a Box of 500)
Units
5500mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 666-6577
Mfr. Part No.GP2Y0A710K0F
BrandSharp
£14.58
Each
Units
5500mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 496-6443
Mfr. Part No.HSDL-9100-021
BrandBroadcom
£1.244
Each (In a Pack of 5)
Units
5mm Photodiode 50ns 50ns - 4 Surface Mount SMD 6.9 x 2.78 x 2.7mm 2.7mm 6.9mm +85°C -40°C 2.75mm
RS Stock No. 178-2947
Mfr. Part No.HSDL-9100-021
BrandBroadcom
£0.794
Each (On a Reel of 2500)
Units
5mm Photodiode 50ns 50ns - 4 Surface Mount SMD 6.9 x 2.78 x 2.7mm 2.7mm 6.9mm +85°C -40°C 2.75mm
RS Stock No. 666-6564
Mfr. Part No.GP2Y0A21YK0F
BrandSharp
£9.11
Each
Units
800mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 178-7437
Mfr. Part No.GP2Y0A21YK0F
BrandSharp
£5.478
Each (In a Box of 1000)
Units
800mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 170-2386
Mfr. Part No.GP2Y0A02YK0F
BrandSharp
£8.82
Each (In a Tray of 50)
Units
1500mm - - - - 3 Screw Mount - 44.5 x 18.9 x 21.6mm 21.6mm 44.5mm +60°C -10°C 18.9mm
RS Stock No. 315-450
Mfr. Part No.GP2Y0A02YK0F
BrandSharp
£11.93
Each
Units
1500mm - - - - 3 Screw Mount - 44.5 x 18.9 x 21.6mm 21.6mm 44.5mm +60°C -10°C 18.9mm
RS Stock No. 170-0732
Mfr. Part No.OPB720B-06Z
BrandOptek
£10.251
Each (In a Bag of 25)
Units
152mm 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. 414-197
Mfr. Part No.OPB720B-06Z
BrandOptek
£11.28
Each
Units
152mm 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. 919-0082
Mfr. Part No.CNY70
BrandVishay
£0.657
Each (In a Tube of 80)
Units
0.5mm Phototransistor - - 1 4 Through Hole - 7 x 7 x 6mm 6mm 7mm +85°C -40°C 7mm
RS Stock No. 708-5348
Mfr. Part No.CNY70
BrandVishay
£0.922
Each (In a Pack of 5)
Units
0.5mm Phototransistor - - 1 4 Through Hole - 7 x 7 x 6mm 6mm 7mm +85°C -40°C 7mm
RS Stock No. 455-0975
Mfr. Part No.SG2BC, BCD
BrandKodenshi
£2.304
Each (In a Pack of 5)
Units
- Phototransistor 30µs 30µs - 4 - - - - - +90°C -20°C -
RS Stock No. 455-0931
Mfr. Part No.OPB702
BrandOptek
£2.49
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. 170-0777
Mfr. Part No.OPB702
BrandOptek
£2.264
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. 894-7124
Mfr. Part No.SFH 7060
£2.92
Each (In a Pack of 5)
Units
- - 16ns 16ns - 12 Surface Mount Chip 7.2 x 2.5 x 0.9mm 0.9mm 7.2mm +85°C -40°C 2.5mm
RS Stock No. 862-9400
Mfr. Part No.QRE1113
£0.617
Each (In a Pack of 10)
Units
- Phototransistor 20µs 20µs 1 4 Through Hole Miniature 3.6 x 2.9 x 1.7mm 1.7mm 3.6mm +85°C -40°C 2.9mm
RS Stock No. 178-7542
Mfr. Part No.QRE1113
£0.333
Each (In a Bag of 1600)
Units
- Phototransistor 20µs 20µs 1 4 Through Hole Miniature 3.6 x 2.9 x 1.7mm 1.7mm 3.6mm +85°C -40°C 2.9mm
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