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.

Click 'Details' above or link below to see the following content.

  • Differential Pressure

    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.

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  • Absolute Pressure

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

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  • Liquid Level

    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.

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  • Multi-Sensing

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

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  • Draft Pressure

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

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  • Low Flow

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

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  • Product Finder

    This web tool makes it easier to find products according to the application, measurement conditions and required specifications.

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Details

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 Technology Evolution

 

Timeline of Yokogawa's Pressure Sensor Advances.

 

DPharp Pressure Transmitters EJX Series/EJA Series Comparison Table

Refer to the general specifications on each product page for detailed specifications.

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

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

Resources

Application Note
Overview:

DP Level transmitter configuration can be very time consuming. Yokogawa DPharp EJA/EJX Pressure transmitters realize reduction in man hours by smart level setup feature.

Overview:

The primary function of a utility boiler is to convert water into steam to be used by a steam turbine / generator in producing electricity. The boiler consists of a furnace, where air and fuel are combined and burned to produce combustion gases, and a feedwater tube system, the con- tents of which are heated by these gases. 

Overview:

Yokogawa DPharp EJA/EJX Pressure transmitters do not need frequent re-zeroing due to superior long term stability, it contributes to reduce maintenance time.

Industries:
Overview:

Caustic soda and hydrochloric acid, produced in electrolyzer plants, are fundamental materials used in varieties of industries; chemicals, pharmaceuticals, petrol-chemicals, pulp and papers, etc. Profit is the result of the effective production with minimized running / maintenance cost. Proper control of the process brings you stabilized quality of products with the vast operational profit.

Industries:
Application Note
Overview:

Hydrogen is the simplest and smallest atomic element. Water, acids, bases, and the immense family of organic compounds all contain hydrogen. Even though hydrogen is not corrosive, it can cause problems for pressure transmitters through Hydrogen Permeation.

Overview:

DPharp performance in boiler drum level measurement applications is superior to metallic capacitance type pressure transmitters. Improved performance can be attributed to the unique resonant silicon sensor design with dual resonators.

Industries:
Overview:

Differential pressure level measurement has an enemy- temperature. Temperature can have a negative effect on the accuracy of level measurement. This article covers why temperature has this effect and how it can be reduced.

Industries:

Downloads

Videos

Overview:

How much do you know about pressure transmitters? Are you accurately, quickly and reliably measuring pressure? Ultimately, the drive of any good pressure transmitter is to get an accurate, reliable pressure measurement to the data user quickly. This video gives you the answers to your basic questions about pressure and pressure transmitters.

Overview:

Yokogawa’s Local Parameter Setting (LPS) featured in our Pressure Transmitters helps you set 9 parameters without the use of a handheld communicator.

Overview:

Join this webinar to better understand which manifolds you should use for specific applications and conditions. You will learn:

  • A brief history of manifolds
  • An overview of the different types of manifolds that are available
  • The advantages, disadvantages, and application considerations you should consider when selecting a manifold

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