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. 667-5041
Mfr. Part No.GP2S60
BrandSharp
$1.28
Each (In a Pack of 5)
units
0.7mm Phototransistor 20µs 20µs 1 4 Surface Mount SMD 3.2 x 1.7 x 1.1mm 1.1mm 3.2mm +85°C -25°C 1.7mm
RS Stock No. 788-4928
Mfr. Part No.EE-SY1200
BrandOmron
$4.62
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. 740-5058
Mfr. Part No.NJL5901AR-1-TE1
$0.866
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
RS Stock No. 915-4917
Mfr. Part No.SFH 9206-5/6
$1.97
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. 414-175
Mfr. Part No.OPB720A-06Z
BrandOptek
$26.10
Each
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. 642-4323
Mfr. Part No.OPB350W250Z
BrandOptek
$10.21
Each
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. 170-0908
Mfr. Part No.TMD26711
Brandams
$2.849
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. 168-7926
Mfr. Part No.GP1A52HRJ00F
BrandSharp
$1.65
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. 170-0732
Mfr. Part No.OPB720B-06Z
BrandOptek
$20.96
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. 818-7524
Mfr. Part No.TCRT5000L
BrandVishay
$1.196
Each (In a Pack of 10)
units
2.5mm Transistor - - 2 4 Through Hole Leaded 10.2 x 5.8 x 8.5mm 8.5mm 10.2mm +85°C -40°C 5.8mm
RS Stock No. 826-4678
Mfr. Part No.GP1A52HRJ00F
BrandSharp
$2.87
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. 708-2737
Mfr. Part No.TCRT1000
BrandVishay
$1.81
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
$0.693
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. 170-0730
Mfr. Part No.OPB720A-06Z
BrandOptek
$21.63
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. 785-7709
Mfr. Part No.TMD26711
Brandams
$2.62
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. 414-197
Mfr. Part No.OPB720B-06Z
BrandOptek
$23.58
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. 165-6261
Mfr. Part No.TCRT1010
BrandVishay
$0.723
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. 170-0783
Mfr. Part No.OPB350W250Z
BrandOptek
$10.00
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. 818-7521
Mfr. Part No.TCRT1010
BrandVishay
$1.241
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. 145-1738
Mfr. Part No.TCRT5000L
BrandVishay
$1.12
Each (In a Tube of 50)
units
2.5mm Transistor - - 2 4 Through Hole Leaded 10.2 x 5.8 x 8.5mm 8.5mm 10.2mm +85°C -40°C 5.8mm
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