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. 146-0786
Mfr. Part No.GP2Y0A51SK0F
BrandSharp
$11.91
Each
units
15cm - - - - - Surface Mount - 27 x 13.2 x 12mm 12mm 27mm +60°C -10°C 13.2mm
RS Stock No. 182-8041
Mfr. Part No.RPI-122
BrandROHM
$0.711
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. 182-8107
Mfr. Part No.RPR-220PC30N
BrandROHM
$3.908
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. 146-0730
Mfr. Part No.GP2A28AJ000F
BrandSharp
$6.486
Each (In a Bag of 100)
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. 146-0732
Mfr. Part No.GP2A28CJ000F
BrandSharp
$6.486
Each (In a Bag of 100)
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. 146-0788
Mfr. Part No.GP2Y0A51SK2F
BrandSharp
$12.40
Each
units
- - - - - - - - - - - - - -
RS Stock No. 182-8092
Mfr. Part No.RPI-121
BrandROHM
$0.711
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. 182-8085
Mfr. Part No.RPI-0125
BrandROHM
$0.912
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. 170-0782
Mfr. Part No.OPB732
BrandOptek
$5.63
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. 182-8038
Mfr. Part No.RPI-1035
BrandROHM
$1.421
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. 414-181
Mfr. Part No.OPB720B-30VZ
BrandOptek
$31.92
Each
units
762mm 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. 170-0731
Mfr. Part No.OPB720B-30VZ
BrandOptek
$32.01
Each (In a Bag of 25)
units
762mm 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. 146-0785
Mfr. Part No.GP2Y1012AU0F
BrandSharp
$24.52
Each
units
- - - - - - Surface Mount - 46 x 34 x 17.6mm 17.6mm 46mm +65°C -10°C 34mm
RS Stock No. 146-0773
Mfr. Part No.GP2A230LRS0F
BrandSharp
$5.03
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. 168-5232
Mfr. Part No.SFH 7070
$1.824
Each (On a Reel of 1500)
units
- - - - - - - - - - - - - -
RS Stock No. 146-0743
Mfr. Part No.GP2Y0A51SK2F
BrandSharp
$7.748
Each (In a Tray of 50)
units
- - - - - - - - - - - - - -
RS Stock No. 642-4301
Mfr. Part No.OPB732
BrandOptek
$5.75
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. 146-0725
Mfr. Part No.GP2A25J0000F
BrandSharp
$5.085
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. 146-0729
Mfr. Part No.GP2A25DJ000F
BrandSharp
$6.398
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. 146-0782
Mfr. Part No.GP2A200LCS0F
BrandSharp
$7.85
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
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