Transducer/sensor is a kind of detection device, is the primary link to realize

automatic detection andautomatic control.

         The characteristics of the sensor include: miniaturization, digitalization,

intelligence, multi-function, systematization and networking. It is usually

divided into ten categories according to its basic sensing function, such as

thermal element, photosensor, gas sensor, force sensor, magnetic sensor,

humidity sensor, sound sensor, radiation sensor, color sensor and taste sensor.

It is widely used in various fields such as automobile, industry and consumption.

The sensor can feel the measured information, and can transform the felt information

into an electrical signal or other required form of information output according

to a certain law to meet the requirements of information transmission, processing,

storage, display, recording and control.