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. 146-0743
Mfr. Part No.GP2Y0A51SK2F
BrandSharp
£3.121
Each (In a Tray of 50)
Units
- - - - - - - - - - - - - -
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. 146-0789
Mfr. Part No.GP2S60B
BrandSharp
£0.219
Each (In a Pack of 20)
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
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. 161-2050
Mfr. Part No.VCNT2020
BrandVishay
£0.294
Each (On a Reel of 3000)
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. 182-8100
Mfr. Part No.RPI-122
BrandROHM
£0.405
Each (In a Pack of 10)
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. 182-8040
Mfr. Part No.RPI-121
BrandROHM
£0.469
Each (In a Bag of 2000)
Units
1mm Phototransistor 10µs 10µs 1 4 Through Hole - 3.6 x 2.6 x 3.3mm 3.3mm 3.6mm +85°C -25°C 2.6mm
RS Stock No. 146-0773
Mfr. Part No.GP2A230LRS0F
BrandSharp
£4.058
Each (In a Pack of 4)
Units
27 (Non-Detection) mm, 9 (Detection) mm Photointerrupter - - - - Snap-In - 32.8 x 8 x 8mm 8mm 32.8mm +70°C -10°C 8mm
RS Stock No. 146-0746
Mfr. Part No.GP2Y0A51SK0F
BrandSharp
£4.635
Each (In a Tray of 50)
Units
15cm - - - - - Surface Mount - 27 x 13.2 x 12mm 12mm 27mm +60°C -10°C 13.2mm
RS Stock No. 146-0725
Mfr. Part No.GP2A25J0000F
BrandSharp
£3.107
Each (In a Bag of 100)
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. 182-6290
Mfr. Part No.BH1792GLC-E2
BrandROHM
£4.026
Each (On a Reel of 3000)
Units
- Photodiode - - 1 10 Through Hole - 2.8 x 0.9 x 2.8mm 2.8mm 2.8mm +85°C -20°C 0.9mm
RS Stock No. 161-2156
Mfr. Part No.VCNT2020
BrandVishay
£0.376
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. 146-0721
Mfr. Part No.GP2A230LRS0F
BrandSharp
£2.509
Each (In a Bag of 100)
Units
27 (Non-Detection) mm, 9 (Detection) mm Photointerrupter - - - - Snap-In - 32.8 x 8 x 8mm 8mm 32.8mm +70°C -10°C 8mm
RS Stock No. 146-0786
Mfr. Part No.GP2Y0A51SK0F
BrandSharp
£6.26
Each
Units
15cm - - - - - Surface Mount - 27 x 13.2 x 12mm 12mm 27mm +60°C -10°C 13.2mm
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. 182-8092
Mfr. Part No.RPI-121
BrandROHM
£0.271
Each (In a Pack of 20)
Units
1mm Phototransistor 10µs 10µs 1 4 Through Hole - 3.6 x 2.6 x 3.3mm 3.3mm 3.6mm +85°C -25°C 2.6mm
RS Stock No. 146-0727
Mfr. Part No.GP2A200LCS0F
BrandSharp
£2.765
Each (In a Bag of 100)
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. 182-6294
Mfr. Part No.BH1792GLC-E2
BrandROHM
£5.17
Each
Units
- Photodiode - - 1 10 Through Hole - 2.8 x 0.9 x 2.8mm 2.8mm 2.8mm +85°C -20°C 0.9mm
RS Stock No. 146-0741
Mfr. Part No.GP2Y1012AU0F
BrandSharp
£5.417
Each (In a Tray of 50)
Units
- - - - - - Surface Mount - 46 x 34 x 17.6mm 17.6mm 46mm +65°C -10°C 34mm
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
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