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. 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. 146-0782
Mfr. Part No.GP2A200LCS0F
BrandSharp
£4.48
Each (In a Pack of 2)
Units
22 (Detection) mm, 90 (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. 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. 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. 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. 146-0785
Mfr. Part No.GP2Y1012AU0F
BrandSharp
£5.51
Each
Units
- - - - - - Surface Mount - 46 x 34 x 17.6mm 17.6mm 46mm +65°C -10°C 34mm
RS Stock No. 182-8042
Mfr. Part No.RPR-220PC30N
BrandROHM
£2.277
Each (In a Tube of 2500)
Units
6mm Phototransistor 10µs 10µs 1 4 Through Hole - 6.4 x 4.9 x 6.5mm 6.5mm 6.4mm +85°C -25°C 4.9mm
RS Stock No. 182-8107
Mfr. Part No.RPR-220PC30N
BrandROHM
£1.736
Each (In a Pack of 5)
Units
6mm Phototransistor 10µs 10µs 1 4 Through Hole - 6.4 x 4.9 x 6.5mm 6.5mm 6.4mm +85°C -25°C 4.9mm
RS Stock No. 146-0784
Mfr. Part No.GP2A25NJJ00F
BrandSharp
£5.355
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. 182-8041
Mfr. Part No.RPI-122
BrandROHM
£0.516
Each (In a Bag of 2000)
Units
0.8mm Phototransistor 10µs 10µs 1 4 Through Hole - 3.6 x 3.4 x 3.3mm 3.3mm 3.6mm +85°C -25°C 3.4mm
RS Stock No. 146-0774
Mfr. Part No.GP2A210LCSJF
BrandSharp
£5.12
Each
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. 146-0747
Mfr. Part No.GP2S60B
BrandSharp
£0.215
Each (On a Reel of 2000)
Units
0.5mm Phototransistor 20µs 20µs - - Surface Mount SMD 3.2 x 1.7 x 1.1mm 1.1mm 3.2mm +85°C -25°C 1.7mm
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