The smart instrument with new generation fieldbus technology is an indispensable field device in process control, supporting mainstream industrial bus protocols such as HART, Foundation Fieldbus, PROFIBUS PA, PROFIBUS DP, etc. It can be used for the acquisition and control of temperature, pressure, current and other signals at industrial sites, and is suitable for various industrial control environments.

The research on pressure transmitter mainly focuses on the following aspects: ① Pressure transmitter communication methods. ② Pressure sensors in high temperature extreme environments. ③ Pressure transmitter with self-diagnosis function. ④ Pressure transmitter temperature compensation method. ⑤ Pressure transmitter other aspects of the research progress.