Gauge Pressure

What Is a Gauge Pressure Transmitter?

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.

Today’s highly accurate gauge pressure sensors can be affected by fluctuations in the local ambient pressure. Measurements above the ambient air pressure are represented as a positive number, while a negative number represents measurements below ambient. A gauge pressure measurement is indicated by the letter ‘g’ following the unit of measure of the reading (i.e., inH₂O(g) or psig).

What Are the Benefits of Gauge Pressure Transmitters?

Yokogawa gauge pressure solutions include traditional mount and in-line mount transmitters, all featuring Yokogawa DPharp technology to deliver accurate, repeatable, and fast-responding gauge pressure measurements.

Common Industrial Applications

  • Open tank level
  • Line pressure in a pipe
  • Blanket pressure in a tank

Which Series Is Right for You?

View the comparison chart. 


Which Series Is Right for You?

  Gauge Pressure Gauge Pressure
EJA-E Series EJX-A Series
± 0.025%  
± 0.040%
± 0.055%  
± 0.1% of URL per 15 years  
± 0.1% of URL per 10 years  
Response Time
90 msec
FMEDA Report
IEC 61508 Certified (SIL 2)
Specification Conformance



Download this eBook and learn:

  • The basic physics of pressure
  • Different types of pressure sensors
  • Features of pressure transmitters
  • Pressure transmitters communications standards
  • Key characteristics of pressure
  • Common types of diaphragm seals


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