With the development of automation and intelligence of measurement and control systems, traditional sensors can no longer meet certain data processing capabilities and the functions of self-checking, self-calibration, and self-compensation. The research and development and application of domestic sensors and multi-functional sensors have entered the market.

Sensors, like human facial features, are important tools for acquiring information. It plays a huge role in industrial production, national defense construction and science and technology. However, compared with the rapid development of computers, the sensors as "facial features" are far behind the development speed of computers as "brains".

With the development of automation and intelligence of measurement and control systems, sensors are required to have high accuracy, high reliability, good stability, and have certain data processing capabilities, as well as self-inspection, self-calibration, and self-compensation. Traditional sensors can no longer meet such requirements.

In addition, in order to manufacture high-performance sensors, it is also difficult to improve the material process alone. It is necessary to use computer technology to combine with sensor technology to make up for its lack of performance. Computer technology has made a huge change in sensor technology, microprocessors (or Microcomputer) and sensors are combined to produce powerful domestic sensors. Abroad called Intelligentsensor (domestic sensor) or Smartsensor (smart, alert, domestic sensor). In addition, traditional sensors generally can only measure one parameter, and in some occasions, a small-sized multi-function sensor that measures multiple parameters at the same time is required. Now scientists from many countries have paid attention to the development of this direction, and have developed some multifunctional sensors.