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.

Reduce process variability, increase yield, and improve product reproducibility with reference accuracy as low as 0.025% of span backed by an unconditional stability guarantee of 0.1% of URL for 10 years. Yokogawa pressure instruments offer uncompromising quality, durability, and longevity.

  • 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 instruments compare two pressures and transmit the difference to a control unit. These transmitters have a limitless number of industrial applications.

  • Gauge pressure instruments 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 instruments 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.

  • Yokogawa offers a complete line of Manifolds, Communicators, Remote Indicators, and Pressure Calibrators to support your Pressure Transmitters. 

Yokogawa has more than 45 years experience in the development, design, and manufacture of pressure sensors and pressure instruments. The DPharp series of digital pressure transmitters use a differential pressure high accuracy resonance (DPharp) sensor that represents one of the most revolutionary advances in transmitter technology.

Pressure Transmitter Historical Time Line

Timeline of Yokogawa's 45 Years of Pressure Sensor Advances.


Explore how Yokogawa pressure transmitters can Boost your bottom line.

Everyone is in business to make money; Yokogawa's DPharp transmitter's rugged, easy-to-use design allows you to run your plant better, run your plant longer, and  maintain your plant easier - Boosting your bottom line! With Yokogawa pressure instruments: 

Plants run better.

The DPharp digital sensor offers the performance and device intelligence needed to get greater insight into your process. Look for these icons on this website, FieldGuides, and Product Data Sheets.

Digital Performance
Poor Performance = Lost Money
More Information
More Information = Found Money
Good Diagnostics = Less Surprises


Plants run longer.

The DPharp active digital sensor, with patented back check diagnostic and rugged construction, allows users to run their plants safer and with less downtime. Look for these icons on this website, FieldGuides, and Product Data Sheets.

Rugged Construction
Ruggedness = Reliability
Proven Technology
Less Downtime = Making Product
Inherently Safe Design
Inherently Safe = Reliability


Routine maintenance is easier.

DPharp transmitters offer long-term stability and diagnostics to make your maintenance routine easy. Look for these icons on this website, FieldGuides, and Product Data Sheets.

Quicker Maintenance
Quicker = Less Downtime
Less Inventory
High Inventory = Stagnant Money
No Learning Curve
No Learning Curve = Smooth Change Over
Application Note

Level transmitter configuration can be very time consuming. DPharp transmitters with advanced software functionality eliminate this time consuming task. With maintenance shops getting smaller, finding equipment that allows us to do more with less becomes a priority.


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. 


Gas flow data calculated by an RTU can be sent back to a transmitter using the two-way communications capability of FOUNDATION fieldbus.


Considering safety and environmental issues such as combustion efficiency and decreasing NOX and CO in exhaust gas, it has become important to control O2 concentration in garbage incineration processes.


H2S management of exhaust gas in black liquor recovery boilers is required to meet an environmental regulations.

Application Note

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.


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.


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.


Field instruments are expected to be equipped with diagnostic functions to predict abnormal process conditions, and are also expected to expand these functions. The ability to extract diagnostic information for prediction and prevention from various physical process quantities measured by devices and make it available allows the user to reduce non-essential and non-urgent maintenance and thus cut maintenance costs.


Safe plant operation has long been pursued in all industries. Specifically, in the process automation industry which involves many hazardous elements, safety measures including explosion-protected systems have been adopted based on numerous tragic experiences.

Yokogawa Technical Report

When evaluating mass flow rates using a primary device such as an orifice or nozzle in a differential pressure flow meter in order to make fluid density compensations, the upstream pressure (static pressure) and fluid temperature are measured in addition to the output of a regular differential pressure transmitter.


Since the release of the DPharp EJ series in 1991 and the DPharp EJA series in 1994, nearly 1.2 million of these transmitters have been operating all over the world. Recently, we have also developed the EJX series of even more compact, lightweight and advanced transmitters with multi- sensing capabilities built using silicon resonant sensor technology.


The innovation of wireless technology increases the use of wireless communication in the industry. The introduction of wireless communication to plants, however, requires strict features such as robustness, real-time responsiveness, and low power consumption. This has restricted the use of wireless communication to limited applications such as data logging and device status monitoring that does not require strict real-time responsiveness and data arrival reliability in communication.


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
Instruction Manuals
General Specifications
Technical Information

Training Videos

Product Overviews


    The Yokogawa family of pressure transmitters features a unique digital pressure sensor called DPharp to provide the most stable and accurate pressure measurement offered today.


    The unique design of the DPharp sensor allows for measuring differential pressure and static pressure at the same time.


    Yokogawa's unique capsule design equalizes overpressure within the capsule before it can reach the measurement sensor.


    Calibration frequency is determined by factoring the real-world performance of a device against the required measurement threshold. Yokogawa’s superior performance delivers increased performance in real-world conditions.

    Product Overview

    The response time of a transmitter is key to safe and accurate process control.  
    Yokogawa’s DPharp pressure transmitter family features the fastest response time available on the market today. 

    Product Overview

    The rich display of DPharp transmitters makes installation, commissioning and operation easy.


    The advanced diagnostics in Yokogawa EJX pressure transmitters provide powerful insight into your process to predict failures before they happen.


    There are many types of pressure transmitter mounting configurations for new and replacement installations.  
    Using the DPharp universal mount flanges and universal mounting bracket, almost any installation can be achieved.


    Yokogawa’s transmitters can be easily programmed to output and display volume of irregularly shaped tanks with its signal characterizer function.


    By using open standards and enabling technologies, the multi-sensing and advanced diagnostic capabilities in DPharp intelligent devices can be effectively utilized.


    Every Yokogawa pressure transmitter is designed from the ground up with safety in mind.  
    At the heart of this philosophy is the inherently safe DPharp sensor.  
    All Yokogawa pressure transmitters come with safety certification as standard and at no extra cost.


    Multi-variable transmitters deliver improved mass flow accuracy and reduced total cost of ownership.



    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.



    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

    Poor performing instruments can cause safety incidents, production downtime, or lower product quality. For those reasons and others, accurate instrument measurements are important in any industrial environment.

    In this webinar you will learn:

    • What needs to be considered to determine the real performance of a pressure transmitter
    • What is “over pressure” and how does it relate to the performance of a pressure transmitter
    • How to determine a calibration interval

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