Pressure Transmitters

Pressure transmitters are used to measure the pressure or level of industrial liquids and gases. The output is transmitted to a control system. Accurate and stable process measurements ensure the safe, reliable, and profitable operation of your plant.

Compact, lightweight, intuitive and intelligent, Yokogawa pressure instruments simplify all aspects of handling, commissioning, installation, operation, and maintenance while delivering outstanding performance. Whether installed in the harsh environment of an offshore platform or a refinery in the burning desert heat, our DPharp series delivers accurate, repeatable, and high integrity process measurements.

Learn more about Pressure Transmitters.

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  • DPharp Pressure Transmitters Comparison Table
  • Accurate level readings are essential to the safe, reliable, profitable operation of your plant. Liquid Level transmitters measure differential pressure to infer the level in a vessel.

  • Differential Pressure (DP) is defined as the difference between two pressures. Differential Pressure Transmitters 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.

  • Diaphragm Seal System can be used to measure liquid, gas, or steam flow as well as liquid level, density, and pressure.

  • Gauge Pressure transmitters compare a pressure relative to atmospheric measure.

  • Absolute Pressure transmitters compare a pressure relative to Absolute pressure. Absolute pressure is always a positive value.

  • Draft Pressure transmitters are a unique type of differential transmitter that is designed to measure small differences in very low static pressure environments.

  • Using Bernoulli's equation, Differential Pressure transmitters can be used to infer the flow of fluid through a pipe.

  • There are several technologies on the market to measure mass flow. One is the Multi-variable Pressure Transmitter.

  • A Multi-Sensing transmitter combines transmitters for Differential Pressure, Gauge Pressure, and Temperature into one field instrument.

  • Hygienic Pressure Transmitters are designed to fulfil the requirements of hygienic and pharmaceutical application

Yokogawa have been manufacturing electronic pressure transmitters for more than four decades. We revolutionized the industry and set a new standard for pressure measurement with the introduction of the DPharp digital sensor in 1991. The superior performance of the new technology enabled exponential market expansion. Yokogawa continues, the digital evolution with the enhancement of our DPharp family to deliver best in class pressure measurement solutions to our esteemed customers.

Pressure Transmitter Historical Time Line

Timeline of Yokogawa's Pressure Sensor Advances.

DPharp Pressure Transmitters EJX Series/EJA Series Comparison Table

  EJX-A EJA-E
Accuracy +/- 0.025% X  
+/- 0.040% X X
+/- 0.055%   X
Stability +/- 0.1% of URL for 15 years X  
+/- 0.1% of URL for 10 years   X
Maximum Working Pressure 250 bar X X
160 bar   X
Turn down 200 : 1 X  
100 : 1   X
Multi sensing DP, SP X X
Safety FMEDA report X X
IEC61508 Certified X X
Response time < 90ms X X
User Linearisation 10 points signal characteriser X X
FF Function Blocks AI (Analog Input) X X
PID (PID control) X X
Other * X X
FF Link master Standard X X
Advanced Diagnostics Impulse line blockage detection X  
Heat trace monitoring X  
Alarm output Contact output X  
Multi-Variable DP, SP, PT, QV and QM X  
Wireless Communication ISA100.11a X  

* Other FB include SC (Signal Characteriser), IT (Integrator), AR (Arithmetic) and IS (Input Selecor).

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