Working Principle Of Sensor

‌A sensor is a detection device that can sense the information being measured and convert it into electrical signals or other required forms of information output according to certain rules to meet the requirements of information transmission, processing, storage, display, recording and control. ‌‌

The basic working principle of the sensor usually consists of the following parts:

‌Sensitive element‌: directly sense the measured value and output a physical quantity signal that has a certain relationship with the measured value.
‌Conversion element‌: convert the physical quantity signal output by the sensitive element into an electrical signal.
‌Conversion circuit‌: amplify and modulate the electrical signal output by the conversion element.
‌Auxiliary power supply‌: supply power to the conversion element and the conversion circuit.