Several common and practical measurement methods for differential pressure transmitters:

1. Combined with the throttling element, the liquid flow rate is measured by the pressure value generated by the difference between the front and back of the throttling element.

2. Measure the height of a liquid by utilizing the pressure difference generated by its own gravity.

3. Directly measure the pressure difference of liquids in different pipelines and tanks. During the measurement process, transmitters often encounter some malfunctions. Timely identification, analysis, and handling of these malfunctions are crucial for ongoing production. We have summarized and categorized some judgment analysis methods and analysis processes based on our daily maintenance experience.

When detecting faults in differential pressure transmitters, we should understand the working principle of the differential pressure transmitter in order to more conveniently and quickly identify the cause.

Working principle of differential pressure transmitter: The differential pressure from the double-sided pressure pipes directly acts on the isolation diaphragms on both sides of the transmitter sensor, and is transmitted to the measuring element through the sealing liquid inside the diaphragm. The measuring element converts the measured differential pressure signal into the corresponding electrical signal and transmits it to the converter. After amplification and other processing, it becomes a standard electrical signal output.