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Maker Reflect: Simplifying IR Reflectance Sensor for Beginner

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  • Product Code: MAKER-REFLECT
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Maker Reflect is a tiny reflectance sensor that consists of an infrared (IR) LED that transmits IR light onto a surface and a phototransistor measures how much light is reflected back. The output is in analog voltage - The more IR light is sensed by the phototransistor, the lower the voltage.

Typically this sensor is used in line following robot as the white surfaces reflect more IR than black surfaces. However, it is not limited to line follower, there are much more application which can utilize the Maker Reflect. Eg.: Edge/Border sensor in Sumo robot, wall sensor in maze solving robot, short-distance object detector (presence sensor), a sensor for rotary wheel encoder...etc.

Measuring only (L)18.1mm x (W)8.4mm x (H)4.2mm (Exclude the header pin), this tiny sensor can be easily fitted in the tightest space available on your robot. We purposely designed the sensor so that the mounting hole is at the center so that the sensor can be at the front-most position. This is especially important in the Sumo robot.


  • Operating Voltage: 3.3V and 5V Compatible
  • Sensing Distance (Height): 1mm to 40mm (Vcc = 5V, Black line on a white surface)
  • Output: Analog Voltage (White surface = lower voltage)

Example Application: Line Following Robot, Sumo Robot, Wall Following Robot, Short Distance Object Sensing, Sensor for Printed Rotary Wheel Encoder.

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Q & A (2)
May I know the tutorial link for this sensor ? ( Amira, 07/11/2020 )
Hi, we're sorry as we do not have tutorial for this product ya. But, you can always reach us or drop an email to support@cytron.io for technical assistance. Thanks :)
Can I use Microbit / Makecode to program this IR Reflectance Sensor ( Yudesh Govindaraju , 03/09/2020 )
Hi, no but you can use together with micro:bit ya. Thanks :)

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Tags: line following sensor, IR, infrared, reflectance, sumo, encoder, wall sensor, line sensor, edge sensor