What is a differential pressure transmitter?

 Differential Pressure Transmitter (DPT) is widely used in various industrial fields such as flow measurement, liquid level control, filter monitoring, equipment status monitoring, etc. by accurately measuring the pressure difference between two points. Its important role is to help engineers and operators understand process changes in real time and ensure the stability, efficiency and safety of the system. According to different application conditions, differential pressure transmitters can play the following main uses:

  1. Flow measurement

By combining with flow elements (such as orifice plates, venturi tubes or flow meters), differential pressure transmitters can measure the pressure difference caused by fluid flow. This pressure difference is proportional to the flow rate, and the flow rate of the fluid can be calculated through the output signal of the differential pressure transmitter.

Application example: Flow measurement of fluids such as liquids, gases and steam.

2. Liquid level measurement

In a tank or container, a differential pressure transmitter can be used to measure the liquid level. When the liquid is in a container, changes in the liquid level will cause changes in the bottom pressure. Differential pressure transmitters measure the pressure difference between the bottom and top of a container and use this difference to calculate the liquid level.

Application examples: Liquid level monitoring of liquid storage or processing containers such as oil tanks, chemical reactors, and cooling towers.

3. Filter monitoring

Differential pressure transmitters can be used to monitor the working status of filters. As the filter gradually accumulates dirt or impurities, the pressure difference generated by the fluid flowing through the filter will increase. The differential pressure transmitter can monitor this pressure difference to help determine whether the filter needs to be cleaned or replaced.

Application examples: Air filters, filter monitoring in water treatment systems.

4. Pressure difference monitoring (equipment status monitoring)

Differential pressure transmitters are also used to monitor changes in pressure differences in equipment or pipelines to ensure that the equipment is operating normally. For example, on equipment such as pumps, compressors, and heat exchangers, differential pressure transmitters can monitor their working performance and determine whether the equipment is blocked, worn, or otherwise faulty by measuring the inlet and outlet pressure difference.

Application examples: Operation status monitoring of equipment such as pump stations, compressor systems, and heat exchangers.

5. Pressure differential control of gas and liquid fluids

In many process control applications, a specific pressure differential needs to be maintained to ensure the stable operation of the system. For example, a pipeline where gas or liquid flows may require a certain pressure differential to ensure the normal flow of the fluid in the pipeline. The differential pressure transmitter can monitor the pressure differential in real time and feed the data back to the control system for automatic adjustment.

Application examples: process control systems in the fields of chemical, pharmaceutical, and food processing.

6. Leak detection of gas filters and pipelines

Differential pressure transmitters can also be used for leak detection of gas filters or pipeline systems. When there is a leak in the system, the pressure differential will change. By monitoring the pressure differential in real time, the differential pressure transmitter can detect the leak in time and take appropriate repair measures.

Application examples: Leak monitoring in gas transmission pipelines and closed containers.

MicroSensor provide intelligent and smart pressure transmitters for industrial process control applications in chemical plants, petroleum oil and gas fields, etc. With an intrinsic safe explosion-proof version optional, the differential pressure transmitters and transducers can be used in hazardous environments and offer stable and accurate performance. Besides, the specialized differential pressure transmitter for oxygen pressure measurement is produced and has won a good reputation among customers in the past years. Custom-design service is available with our professional R&D team.

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