Mote Smart Color Sensor:
The light waves in the universe are only about 370nm to 760nm wavelengths visible to humans. The three primary colors refer to the colors seen by people in nature that can be mixed and superimposed by R, G, B, red, green and blue, while white light contains all combinations of light. According to this principle, the color mark sensor uses RGB three-color light source or white light source to restore and distinguish various colors by reflecting different RGB proportion grayscale information such as the object being measured.
Simple color label sensor LX101
Color fiber sensor C71
Long-distance color sensor LRW500