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. 778-1396
Mfr. Part No.SFH 9206
TWD49.20
Each (In a Pack of 5)
units
5mm Phototransistor 30µs 40µs 1 6 Surface Mount SMD 6.2 x 2.1 x 4.2mm 4.2mm 6.2mm +100°C -40°C 2.1mm
RS Stock No. 165-6261
Mfr. Part No.TCRT1010
BrandVishay
TWD16.50
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. 146-0770
Mfr. Part No.GP2A28CJ000F
BrandSharp
TWD221.00
Each
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. 146-0735
Mfr. Part No.GP2A210LCSJF
BrandSharp
TWD199.30
Each (In a Bag of 100)
units
15 (Detection) mm, 70 (Non-Detection) mm Photointerrupter - - - - Surface Mount - 39.8 x 9 x 8.65mm 8.65mm 39.8mm +70°C -10°C 9mm
RS Stock No. 616-5709
Mfr. Part No.KRC011
BrandKingbright
TWD18.00
Each (In a Pack of 5)
units
- - - - - - - - - - - +50°C -25°C -
RS Stock No. 168-7926
Mfr. Part No.GP1A52HRJ00F
BrandSharp
TWD37.70
Each (In a Bag of 100)
units
- Transistor 0.5µs 0.5µs 1 5 Through Hole OPIC 12.2 x 10 x 5mm 5mm 12.2mm +85°C -25°C 10mm
RS Stock No. 170-0730
Mfr. Part No.OPB720A-06Z
BrandOptek
TWD509.40
Each (In a Bag of 25)
units
152mm Open Collector - - 1 3 Screw Mount - 17.15 x 8.38 x 27.94mm 27.94mm 17.15mm +50°C 0°C 8.38mm
RS Stock No. 170-0732
Mfr. Part No.OPB720B-06Z
BrandOptek
TWD512.20
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. 862-9400
Mfr. Part No.QRE1113
TWD27.00
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. 170-0778
Mfr. Part No.OPB705
BrandOptek
TWD92.20
Each (In a Bag of 25)
units
3.8mm Phototransistor - - 1 4 - - 17.78 x 5.08 x 22.86mm 22.86mm 17.78mm - - 5.08mm
RS Stock No. 170-0782
Mfr. Part No.OPB732
BrandOptek
TWD143.50
Each (In a Box of 25)
units
1in Phototransistor - - 1 4 Through Hole - 12.19 x 5.08 x 12.7mm 12.7mm 12.19mm +85°C -40°C 5.08mm
RS Stock No. 773-3993
Mfr. Part No.TCND5000
BrandVishay
TWD94.00
Each
units
6mm Photodiode 800ns 800ns 1 4 Surface Mount - 6 x 3.7 x 3.75mm - - +85°C -40°C -
RS Stock No. 182-8037
Mfr. Part No.RPI-0125
BrandROHM
TWD26.10
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. 161-2156
Mfr. Part No.VCNT2020
BrandVishay
TWD19.80
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. 182-6294
Mfr. Part No.BH1792GLC-E2
BrandROHM
TWD325.00
Each
units
- Photodiode - - 1 10 Through Hole WLGA010V28 2.8 x 0.9 x 2.8mm 2.8mm 2.8mm +85°C -20°C 0.9mm
RS Stock No. 124-6801
Mfr. Part No.RPR-220UC30N
BrandROHM
TWD72.00
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. 826-4678
Mfr. Part No.GP1A52HRJ00F
BrandSharp
TWD65.80
Each (In a Pack of 5)
units
- Transistor 0.5µs 0.5µs 1 5 Through Hole OPIC 12.2 x 10 x 5mm 5mm 12.2mm +85°C -25°C 10mm
RS Stock No. 182-6290
Mfr. Part No.BH1792GLC-E2
BrandROHM
TWD177.70
Each (On a Reel of 3000)
units
- Photodiode - - 1 10 Through Hole WLGA010V28 2.8 x 0.9 x 2.8mm 2.8mm 2.8mm +85°C -20°C 0.9mm
RS Stock No. 146-0787
Mfr. Part No.GP2A25DJ000F
BrandSharp
TWD170.00
Each
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. 178-7542
Mfr. Part No.QRE1113
TWD15.50
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