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. 773-3993
Mfr. Part No.TCND5000
BrandVishay
£2.03
Each
Units
6mm Photodiode 800ns 800ns 1 4 Surface Mount - 6 x 3.7 x 3.75mm - - +85°C -40°C -
RS Stock No. 170-0908
Mfr. Part No.TMD26711
Brandams
£0.985
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. 785-7709
Mfr. Part No.TMD26711
Brandams
£1.015
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. 170-9507
Mfr. Part No.SFH 9540
£1.136
Each (In a Tube of 70)
Units
- - - - - 4 Surface Mount - 13.46 x 6.8 x 10mm - - - - -
RS Stock No. 876-8824
Mfr. Part No.SFH 9540
£1.555
Each (In a Pack of 10)
Units
- - - - - 4 Surface Mount - 13.46 x 6.8 x 10mm - - - - -
RS Stock No. 773-0420
Mfr. Part No.VCNL4010-GS08
BrandVishay
£2.49
Each (In a Bag of 2)
Units
200mm Microcontroller - - 1 13 Surface Mount - 3.95 x 3.95 x 0.75mm - - +85°C -25°C -
RS Stock No. 919-1001
Mfr. Part No.VCNL4010-GS08
BrandVishay
£1.08
Each (On a Reel of 1800)
Units
200mm Microcontroller - - 1 13 Surface Mount - 3.95 x 3.95 x 0.75mm - - +85°C -25°C -
RS Stock No. 170-9657
Mfr. Part No.SFH 9206-5/6
£0.392
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. 915-4917
Mfr. Part No.SFH 9206-5/6
£0.987
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. 818-7521
Mfr. Part No.TCRT1010
BrandVishay
£0.579
Each (In a Pack of 10)
Units
1mm Transistor - - 2 4 Through Hole Leaded 7 x 2.5 x 4mm 4mm 7mm +85°C -25°C 2.5mm
RS Stock No. 165-6261
Mfr. Part No.TCRT1010
BrandVishay
£0.369
Each (In a Bag of 1000)
Units
1mm Transistor - - 2 4 Through Hole Leaded 7 x 2.5 x 4mm 4mm 7mm +85°C -25°C 2.5mm
RS Stock No. 915-4926
Mfr. Part No.SFH 9206-6/7
£0.987
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. 170-9658
Mfr. Part No.SFH 9206-6/7
£0.392
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. 182-8085
Mfr. Part No.RPI-0125
BrandROHM
£0.344
Each (In a Pack of 10)
Units
1.2mm Phototransistor 10µs 10µs 1 4 Surface Mount - 3.6 x 3.3 x 2.8mm 2.8mm 3.6mm +85°C -25°C 3.3mm
RS Stock No. 182-8037
Mfr. Part No.RPI-0125
BrandROHM
£0.58
Each (On a Reel of 750)
Units
1.2mm Phototransistor 10µs 10µs 1 4 Surface Mount - 3.6 x 3.3 x 2.8mm 2.8mm 3.6mm +85°C -25°C 3.3mm
RS Stock No. 146-0777
Mfr. Part No.GP2A25J0000F
BrandSharp
£4.905
Each (In a Pack of 2)
Units
27 (Non-Detection) mm, 9 (Detection) mm Photointerrupter - - - - Surface Mount - 39.8 x 9 x 8.65mm 8.65mm 39.8mm +60°C -10°C 9mm
RS Stock No. 182-8087
Mfr. Part No.RPI-1035
BrandROHM
£0.776
Each (In a Pack of 5)
Units
- Phototransistor 10ms 10ms 1 6 Surface Mount - 3.9 x 3.9 x 2.4mm 2.4mm 3.9mm +85°C -25°C 3.9mm
RS Stock No. 182-8038
Mfr. Part No.RPI-1035
BrandROHM
£0.947
Each (On a Reel of 750)
Units
- Phototransistor 10ms 10ms 1 6 Surface Mount - 3.9 x 3.9 x 2.4mm 2.4mm 3.9mm +85°C -25°C 3.9mm
RS Stock No. 146-0770
Mfr. Part No.GP2A28CJ000F
BrandSharp
£2.33
Each
Units
27 (Non-Detection) mm, 9 (Detection) mm Photointerrupter - - - - Surface Mount - 26.8 x 9 x 8mm 8mm 26.8mm +60°C -10°C 9mm
RS Stock No. 740-5058
Mfr. Part No.NJL5901AR-1-TE1
£0.418
Each (In a Pack of 5)
Units
- Phototransistor 30µs 30µs 1 4 Surface Mount COBP - 0.6mm 1.6mm +85°C -30°C 1.3mm
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