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. 170-0782
Mfr. Part No.OPB732
BrandOptek
MYR25.769
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. 170-0783
Mfr. Part No.OPB350W250Z
BrandOptek
MYR27.52
Each (In a Bag of 25)
units
6.35mm Phototransistor - - 1 4 Screw Mount - 29.59 x 7.62 x 13.34mm 13.34mm 29.59mm +85°C -40°C 7.62mm
RS Stock No. 170-0730
Mfr. Part No.OPB720A-06Z
BrandOptek
MYR57.31
Each (In a Bag of 25)
units
152mm Open Collector - - 1 3 Screw Mount - 17.15 x 8.38 x 27.94mm 27.94mm 17.15mm +50°C 0°C 8.38mm
RS Stock No. 642-4301
Mfr. Part No.OPB732
BrandOptek
MYR23.90
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. 414-197
Mfr. Part No.OPB720B-06Z
BrandOptek
MYR57.22
Each
units
152mm 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. 414-181
Mfr. Part No.OPB720B-30VZ
BrandOptek
MYR91.13
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
MYR87.40
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. 170-0778
Mfr. Part No.OPB705
BrandOptek
MYR16.376
Each (In a Bag of 25)
units
3.8mm Phototransistor - - 1 4 - - 17.78 x 5.08 x 22.86mm 22.86mm 17.78mm - - 5.08mm
RS Stock No. 170-0732
Mfr. Part No.OPB720B-06Z
BrandOptek
MYR56.07
Each (In a Bag of 25)
units
152mm 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. 455-0931
Mfr. Part No.OPB702
BrandOptek
MYR11.47
Each
units
3.81mm Phototransistor - - 1 4 Through Hole - 17.78 x 4.78 x 8.89mm 8.89mm 17.78mm +85°C -40°C 4.78mm
RS Stock No. 414-175
Mfr. Part No.OPB720A-06Z
BrandOptek
MYR57.31
Each
units
152mm Open Collector - - 1 3 Screw Mount - 17.15 x 8.38 x 27.94mm 27.94mm 17.15mm +50°C 0°C 8.38mm
RS Stock No. 455-0947
Mfr. Part No.OPB705
BrandOptek
MYR15.39
Each
units
3.8mm Phototransistor - - 1 4 - - 17.78 x 5.08 x 22.86mm 22.86mm 17.78mm - - 5.08mm
RS Stock No. 170-0777
Mfr. Part No.OPB702
BrandOptek
MYR14.93
Each (In a Bag of 25)
units
3.81mm Phototransistor - - 1 4 Through Hole - 17.78 x 4.78 x 8.89mm 8.89mm 17.78mm +85°C -40°C 4.78mm
RS Stock No. 642-4323
Mfr. Part No.OPB350W250Z
BrandOptek
MYR27.52
Each
units
6.35mm Phototransistor - - 1 4 Screw Mount - 29.59 x 7.62 x 13.34mm 13.34mm 29.59mm +85°C -40°C 7.62mm