Differential Pressure Transmitter

What is a Differential Pressure Transmitter?
A differential pressure (DP) transmitter is a device that measures the difference between two pressures. It has two process connections, a ‘high-pressure’ side (HP) and a ‘low-pressure’ side (LP). The transmitter calculates the difference between these two pressures and converts it into a proportional analog or digital electrical signal, typically a 4-20 mA current loop or a digital signal using protocols like HART, FOUNDATION Fieldbus, or Profibus. This output signal can then be used by a control system, such as a PLC (Programmable Logic Controller) or a DCS (Distributed Control System), to monitor and control a process.

Common Level Applications with Differential Pressure Transmitters：
Open Tank Measurement: The transmitter measures the hydrostatic pressure at the tank bottom relative to atmospheric pressure, providing accurate level readings regardless of atmospheric changes.
Closed Tank Measurement: For pressurized vessels, the transmitter compares the pressure at the tank bottom to the vapor space pressure, eliminating the effects of vessel pressure on level measurement.
Interface Level Detection: DP transmitters can measure the interface level between two liquids of different densities, crucial in separation processes and oil production.
Differential pressure transmitters can accurately measure flow rates for liquids, gases, and steam when properly configured. This versatility makes them essential in industries ranging from oil and gas processing to power generation and chemical manufacturing.
The most common primary elements used with differential pressure transmitters include:Orifice Plates，Venturi Tubesd and Flow Nozzles.

Technical Parameters：

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