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. 455-0975
Mfr. Part No.SG2BC, BCD
BrandKodenshi
R 17.564
Each (In a Pack of 5)
units
- Phototransistor 30µs 30µs - 4 - - - - - +90°C -20°C -
RS stock no. 666-6564
Mfr. Part No.GP2Y0A21YK0F
BrandSharp
R 154.69
Each
units
800mm - - - - - - - - - - +60°C -10°C -
RS stock no. 178-7437
Mfr. Part No.GP2Y0A21YK0F
BrandSharp
R 96.755
Each (In a Box of 1000)
units
800mm - - - - - - - - - - +60°C -10°C -
RS stock no. 165-2675
Mfr. Part No.TCRT1000
BrandVishay
R 5.26
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. 170-9507
Mfr. Part No.SFH 9540
R 21.42
Each (In a Tube of 70)
units
- - - - - 4 Surface Mount - 13.46 x 6.8 x 10mm - - - - -
RS stock no. 708-2737
Mfr. Part No.TCRT1000
BrandVishay
R 5.508
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. 876-8824
Mfr. Part No.SFH 9540
R 29.227
Each (In a Pack of 10)
units
- - - - - 4 Surface Mount - 13.46 x 6.8 x 10mm - - - - -
RS stock no. 642-4301
Mfr. Part No.OPB732
BrandOptek
R 60.64
Each
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. 170-0782
Mfr. Part No.OPB732
BrandOptek
R 77.855
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. 315-450
Mfr. Part No.GP2Y0A02YK0F
BrandSharp
R 208.47
Each
units
1500mm - - - - 3 Screw Mount - 44.5 x 18.9 x 21.6mm 21.6mm 44.5mm +60°C -10°C 18.9mm
RS stock no. 170-2386
Mfr. Part No.GP2Y0A02YK0F
BrandSharp
R 156.126
Each (In a Tray of 50)
units
1500mm - - - - 3 Screw Mount - 44.5 x 18.9 x 21.6mm 21.6mm 44.5mm +60°C -10°C 18.9mm
RS stock no. 818-7524
Mfr. Part No.TCRT5000L
BrandVishay
R 11.383
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. 666-6570
Mfr. Part No.GP2Y0D21YK0F
BrandSharp
R 212.04
Each
units
- - - - - - - - - - - +60°C -10°C -
RS stock no. 145-1738
Mfr. Part No.TCRT5000L
BrandVishay
R 11.239
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
RS stock no. 826-4678
Mfr. Part No.GP1A52HRJ00F
BrandSharp
R 26.594
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. 876-9439
Mfr. Part No.SFH 7051
R 11.012
Each (In a Pack of 5)
units
- - - - - 8 Surface Mount - 4.7 x 2.5 x 0.9mm - - - - -
RS stock no. 666-6577
Mfr. Part No.GP2Y0A710K0F
BrandSharp
R 499.98
Each
units
5500mm - - - - - - - - - - +60°C -10°C -
RS stock no. 708-5348
Mfr. Part No.CNY70
BrandVishay
R 19.012
Each (In a Pack of 5)
units
0.5mm Phototransistor - - 1 4 Through Hole - 7 x 7 x 6mm 6mm 7mm +85°C -40°C 7mm
RS stock no. 178-7542
Mfr. Part No.QRE1113
R 5.943
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
RS stock no. 862-9400
Mfr. Part No.QRE1113
R 10.395
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