What is a Color Sensor?
- joyliu64
- Dec 28, 2025
- 1 min read
A color sensor is a sophisticated photoelectric device designed to detect, analyze, and respond to the color of an object or light source. Unlike simple light sensors that measure only intensity, a color sensor can distinguish between different hues, providing a quantitative, objective, and consistent measurement of color. This technology acts as a form of "electronic eye," bridging the gap between human visual perception and machine automation.
Color Sensor vs Photodetector sensor
Light Sensor (Photodetector): A light sensor only measures the intensity or brightness of light. It cannot differentiate between a dim red light and a dim green light of the same intensity. A color sensor can.
Color Sensor vs Proximity Sensor
Proximity Sensor: While some proximity sensors use light, their sole purpose is to detect the presence or absence of an object and its distance, not its color.






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