How Are Sensors Composed?

The sensor is generally composed of four parts: sensitive element, conversion element, conversion circuit and auxiliary power supply. The sensitive element directly senses the measured quantity and outputs a physical quantity signal that has a certain relationship with the measured quantity; the conversion element converts the physical quantity signal output by the sensitive element into an electrical signal; the conversion circuit is responsible for amplifying and modulating the electrical signal output by the conversion element; the conversion element and the conversion circuit generally also require auxiliary power supply.