Differential Pressure

Differential Pressure (DP) transmitters measure the difference between two pressures. They use a reference point called the low-side pressure and compare it to the high-side pressure. Ports in the instrument are marked high-side and low-side. The DP reading can be either negative or positive depending on whether the low-side or high-side is the larger value. A DP transmitter can be used as a gauge pressure transmitter if the low-side is left open to the atmosphere.

Example Industrial Applications: Closed Tank Level, Density, Filter health, and DP Flow (Secondary Element)

Yokogawa gauge pressure transmitters use digital DPharp sensor technology to get accurate, reliable readings to you quickly.

Which Series is Right for You?

Click 'Details' above to learn more about each solution.

  • Traditional-mount Differential Pressure Transmitter based on the EJA-E Series.

  • Traditional-mount Differential Pressure Transmitter based on the EJX-A Series.

  • Differential Pressure Transmitter with Remote Diaphragm Seals based on the EJA-E Series.

  • Differential Pressure Transmitter with Remote Diaphragm Seals based on the EJX-A Series.

  • Traditional-mount High Static Differential Pressure Transmitter based on the EJA-E Series.

  • Traditional-mount High Static Differential Pressure Transmitter based on the EJX-A Series.

  • Digital Remote Sensor (DRS) Transmitter connects two pressure sensors, master (high pressure side) and slave (low pressure side) in a remote location, with DRS dedicated communication cable to measure differential pressure.

  • Diaphragm Seal System consists of differential pressure or gauge pressure transmitter with one or two diaphragm seal.

  • Direct Mounted Diaphragm Seal System consists of differential pressure transmitter with single direct mount diaphragm seal.

  • Traditional-mount Differential Pressure Transmitter designed for Draft Range applications based on the EJA-E Series.

  • Traditional-mount Differential Pressure Transmitter designed for Draft Range applications based on the EJX-A Series.

  • P10

    P10 series can be used to measure not only differential pressure but also flow rate, liquid level, density and other process variables.

Which Series is Right for You?

Refer to the General Specification sheet located under the 'Downloads' tab for detailed specifications.

  EJA-E Series EJX-A Series
EJA-E Series EJX-A Series
Accuracy
± 0.025%  
± 0.040%
± 0.055%  
Stability
± 0.1% of URL per 15 years  
± 0.1% of URL per 10 years  
Response Time
90 msec
Safety
FMEDA Report
IEC 61508 Certified (SIL 2)
Multi-sensing
Differential Pressure
Static Pressure
Overview:

This article describes how multivariable pressure transmitter with built-in dynamic compensation can correct many of the errors and inaccuracies that occur in differential pressure based flow measurements. It also explains how modern flowmeters can ensure ease of integration with FDT technology based tools.

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