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Also known as measuring element, Sensor

thumb|Different types of light sensors A sensor is often defined as a device that receives and responds to a signal or stimulus. The stimulus is the quantity, property, or condition that is sensed and converted into electrical signal.

AI overview

A sensor is a device that detects something in the world—like light, heat, or motion—and converts what it detects into an electrical signal that machines can understand and use. Sensors matter because they allow devices to perceive their environment and respond automatically, making everything from smartphones to cars work intelligently.

AI-generated from the Wikipedia summary — may contain errors.