Sensors are the front-line products of information technology, especially temperature sensors are widely used in industrial and agricultural production, scientific research, and life. The number of sensors used is the most. In the past century, the development of temperature sensors has gone through three stages: traditional discrete temperature sensors (including sensitive components); analog integrated temperature sensors (controllers); and smart temperature sensors. At present, new temperature sensors are developing from analog to digital, from integration to intelligence and networking.

      Generally speaking, the current domestic temperature sensor manufacturers are still at a relatively low level of competition, technical quality and production capacity. The scale of production cannot keep up with the international level, and price wars are common, leading to a decline in product quality. Obviously, product quality, technology and cost are important factors for the advantageous position of domestic enterprises in future competition. In the face of fierce market competition, domestic manufacturers should reduce production costs in various ways, control corporate fixed costs, strengthen independent R&D and technological transformation, and improve development investment in comprehensive competitiveness. Now, the temperature sensor manufacturers are mainly concentrated in the Yangtze River Delta.

     With the continuous development of science and technology, the requirements of measurement and automation technology continue to increase, so temperature sensors are becoming more and more typed.

    In the 21st century, intelligent temperature sensors have developed rapidly in terms of high precision, multi-function, bus standards, high reliability and safety, the development of virtual sensors and network sensors, and the development of high-tech, such as single-chip temperature measurement systems.