Main Functions of The Differential Pressure Transmitter

The dp pressure transmitter is a commonly used measuring instrument for industrial automation. The main function of a dp pressure transmitter is to measure the pressure difference of a fluid or gas in a pipe and convert the differential pressure into a standard signal output. This article will introduce the main functions of the dp transmitter and its application in industrial automation.

The main function of the dp pressure transmitter is to measure the pressure difference of the fluid or gas in the pipeline. In industrial automation, digital differential pressure transmitters can measure liquid level, flow, density, pressure, and other parameters. In liquid level measurement, the dp transmitter can measure the pressure difference between the surface of the liquid and the top of the vessel to calculate the liquid level height. For example, in petrochemicals, the dp transmitter can monitor the tank liquid level and pressure change inside the tank. In gas flow measurement, the digital differential pressure transmitter can measure the dynamic pressure difference produced by the gas in the pipeline. For example, the differential pressure transducer can monitor gas pressure changes in a boiler or burner.

The dp pressure transmitter can also convert the differential pressure into standard signal output. Common output signals are analog and digital signals. Analogue signals are usually current or voltage signals.

The dp transmitters have a variety of measurement methods. The common measurement methods of digital differential pressure transmitters are static pressure measurement and dynamic pressure measurement. Static pressure measurement is suitable for measuring low-speed fluids or gases, and its measurement principle is to calculate the differential pressure by measuring the static pressure difference between two pressure points. Dynamic pressure measurement is suitable for measuring high-speed fluids or gases, and its measuring principle is to calculate the differential pressure by measuring the dynamic pressure difference generated by the liquid or gas in the pipeline.

The differential pressure transducers have a variety of mounting methods. Common mounting methods include flange connection, threaded connection, and insertion type. The flange connection type is suitable for installation in large-diameter pipelines. The threaded connection type differential pressure transducer is suitable for installation in small-diameter pipelines.

It should select the material and accuracy of the dp transmitter according to the application scenario. Common materials include stainless steel, copper alloy, and plastic. Accuracy is usually expressed as a percentage or decimal, such as 0.1%, and 0.2%. According to applications, you can choose dp transmitters with different materials and accuracy.

In conclusion, the dp pressure transmitter is a very important industrial sensor. The differential pressure transmitters are widely used in various industrial fields. By understanding the use scenarios of dp transmitters and their characteristics, we can better understand the role and application scope of dp transmitters.