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.  A DP transmitter can be used as a gauge pressure transmitter if the low-side is left open to the atmosphere.Typical applications:

  • Filter Monitoring
  • Liquid Level Monitoring
  • Flow Monitoring
  • Density Monitoring

process PRESSURE

A gauge pressure (GP) transmitter compares a process pressure against local ambient air pressure. Gauge pressure transmitters have ports to sample the ambient air pressure in real-time.  Measurements above the ambient air pressure are represented as a positive number, while a negative number represents measurements below ambient.  Typical applications:

  • Line Pressure in a pipe
  • Liquid Level Monitoring
  • Tank Blanket Pressure


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