sensor

A sensor is a device or device that senses, detects, or measures physical, chemical, or biological quantities and converts them into signals that can be processed (such as electrical signals, digital signals, etc.). It is a key component in modern automation, industrial control, Internet of Things (IoT), medical health, environmental monitoring and other fields. Its core function is to convert non-electrical signals (such as temperature, pressure, light intensity, sound, humidity, gas concentration, etc.) into electrical signals or other forms of signals to facilitate subsequent signal processing, transmission and analysis.