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. 788-4928
Mfr. Part No.EE-SY1200
BrandOmron
HK$19.28
Each (In a Pack of 2)
units
4mm Phototransistor 30µs 30µs 10 4 Surface Mount SMD 3.2 x 1.9 x 1.1mm 1.1mm 3.2mm +85°C -25°C 1.9mm
RS Stock No. 708-2737
Mfr. Part No.TCRT1000
BrandVishay
HK$9.724
Each (In a Bag of 5)
units
1mm Phototransistor - - 1 4 Through Hole - 7 x 2.5 x 4mm 4mm 7mm +85°C -40°C 2.5mm
RS Stock No. 165-2675
Mfr. Part No.TCRT1000
BrandVishay
HK$3.829
Each (In a Bag of 1000)
units
1mm Phototransistor - - 1 4 Through Hole - 7 x 2.5 x 4mm 4mm 7mm +85°C -40°C 2.5mm
RS Stock No. 170-2820
Mfr. Part No.EE-SY1200
BrandOmron
HK$14.449
Each (On a Reel of 2000)
units
4mm Phototransistor 30µs 30µs 10 4 Surface Mount SMD 3.2 x 1.9 x 1.1mm 1.1mm 3.2mm +85°C -25°C 1.9mm
RS Stock No. 178-7542
Mfr. Part No.QRE1113
HK$4.728
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
RS Stock No. 862-9400
Mfr. Part No.QRE1113
HK$6.59
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. 178-2947
Mfr. Part No.HSDL-9100-021
BrandBroadcom
HK$12.507
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. 146-0745
Mfr. Part No.GP2Y0D02YK0F
BrandSharp
HK$48.832
Each (In a Tray of 50)
units
80cm - - - - - Surface Mount - 37 x 13 x 21.6mm 21.6mm 37mm +60°C -10°C 13mm
RS Stock No. 146-0783
Mfr. Part No.GP2Y0D02YK0F
BrandSharp
HK$68.98
Each
units
80cm - - - - - Surface Mount - 37 x 13 x 21.6mm 21.6mm 37mm +60°C -10°C 13mm
RS Stock No. 496-6443
Mfr. Part No.HSDL-9100-021
BrandBroadcom
HK$19.666
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. 894-7124
Mfr. Part No.SFH 7060
HK$16.536
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. 315-466
Mfr. Part No.GP2Y0D02YK0F
BrandSharp
HK$76.76
Each
units
900mm Digital - - - 3 Surface Mount - 29.5 x 13 x 21.6mm 21.6mm 29.5mm +60°C -10°C 13mm
RS Stock No. 178-7438
Mfr. Part No.GP2Y0A41SK0F
BrandSharp
HK$56.283
Each (In a Tray of 1000)
units
300mm - - - - - - - - - - +60°C -10°C -
RS Stock No. 708-5017
Mfr. Part No.TCRT5000
BrandVishay
HK$7.454
Each (In a Pack of 5)
units
2.5mm Phototransistor - - 1 - Through Hole PCB - 7mm 10.2mm + 85°C - 25°C -
RS Stock No. 178-7439
Mfr. Part No.GP2Y0D810Z0F
BrandSharp
HK$38.522
Each (In a Tray of 1000)
units
100mm Photodiode - - - - - - - - - +60°C -10°C -
RS Stock No. 170-0908
Mfr. Part No.TMD26711
Brandams
HK$15.282
Each (On a Reel of 2500)
units
100mm Photodiode 20ns 20ns 1 8 Surface Mount Flat No Lead 3.94 x 2.36 x 1.35mm 1.35mm 3.94mm +85°C -30°C 2.36mm
RS Stock No. 666-6568
Mfr. Part No.GP2Y0A41SK0F
BrandSharp
HK$78.90
Each
units
300 - - - - - - - - - - +60°C -10°C -
RS Stock No. 785-7709
Mfr. Part No.TMD26711
Brandams
HK$12.18
Each (In a Pack of 2)
units
100mm Photodiode 20ns 20ns 1 8 Surface Mount Flat No Lead 3.94 x 2.36 x 1.35mm 1.35mm 3.94mm +85°C -30°C 2.36mm
RS Stock No. 919-0001
Mfr. Part No.TCRT5000
BrandVishay
HK$5.041
Each (In a Tube of 50)
units
2.5mm - - - - - - - - - - - - -
RS Stock No. 666-6580
Mfr. Part No.GP2Y0D810Z0F
BrandSharp
HK$40.03
Each
units
100mm Photodiode - - - - - - - - - +60°C -10°C -
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