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. 165-2675
Mfr. Part No.TCRT1000
BrandVishay
$0.637
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. 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. 124-1360
Mfr. Part No.QRE1113GR
$0.506
Each (On a Reel of 1000)
units
- Phototransistor 20 μ 20µs 1 4 Surface Mount SMD 3.6 x 2.9 x 1.7mm 1.7mm 3.6mm 85°C -40°C 2.9mm
RS Stock No. 876-8824
Mfr. Part No.SFH 9540
$2.048
Each (In a Pack of 10)
units
- - - - - 4 Surface Mount - 13.46 x 6.8 x 10mm - - - - -
RS Stock No. 826-4671
Mfr. Part No.GP1S51VJ000F
BrandSharp
$0.973
Each (In a Pack of 10)
units
- Phototransistor 15µs 20µs 1 4 Through Hole - 12.2 x 10 x 5mm 5mm 12.2mm +85°C -25°C 10mm
RS Stock No. 915-4926
Mfr. Part No.SFH 9206-6/7
$1.415
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. 170-9658
Mfr. Part No.SFH 9206-6/7
$0.954
Each (On a Reel of 1000)
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. 170-9507
Mfr. Part No.SFH 9540
$2.045
Each (In a Tube of 70)
units
- - - - - 4 Surface Mount - 13.46 x 6.8 x 10mm - - - - -
RS Stock No. 168-7925
Mfr. Part No.GP1S51VJ000F
BrandSharp
$0.914
Each (In a Bag of 100)
units
- Phototransistor 15µs 20µs 1 4 Through Hole - 12.2 x 10 x 5mm 5mm 12.2mm +85°C -25°C 10mm
RS Stock No. 761-3984
Mfr. Part No.QRE1113GR
$1.26
Each (In a Pack of 5)
units
- Phototransistor 20µs 20µs 1 4 Surface Mount SMD 3.6 x 2.9 x 1.7mm 1.7mm 3.6mm +85°C -40°C 2.9mm
RS Stock No. 124-6801
Mfr. Part No.RPR-220UC30N
BrandROHM
$2.78
Each (In a Pack of 5)
units
6mm Phototransistor 10µs 10µs 1 4 Through Hole Radial 6.4 x 4.9 x 6.5mm 6.5mm 6.4mm +85°C -25°C 4.9mm
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. 182-8087
Mfr. Part No.RPI-1035
BrandROHM
$2.014
Each (In a Pack of 5)
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. 146-0747
Mfr. Part No.GP2S60B
BrandSharp
$0.496
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
RS Stock No. 182-8042
Mfr. Part No.RPR-220PC30N
BrandROHM
$3.02
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. 182-6290
Mfr. Part No.BH1792GLC-E2
BrandROHM
$7.946
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. 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. 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. 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. 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
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