The working principle of differential pressure transmitters lies in their sensitive components, usually using a membrane box structure to divide the space into two chambers. When pressure is introduced into two chambers separately, the sensor undergoes displacement due to the pressure difference between the two chambers. This displacement is proportional to the pressure difference and is then converted into a standard signal output. In practical applications, the structure of sensitive components, chamber form, and displacement conversion method can all affect the performance of the transmitter. Differential pressure transmitters are widely used, including liquids, gases, and vapors; Its measurement range ranges from 0-0.1kPa to 0-40MPa. The output signal is 4-20mA DC, and the power supply requirement is 12-45V DC, usually using 24V DC power supply. These parameters make differential pressure transmitters a powerful assistant in the field of industrial measurement.