Yokogawa EJA430E Traditional-mount Gauge Pressure Transmitter

The EJA-E series of transmitters is Yokogawa’s most recent evolution of the DPharp family. Released in 2012, it combines the ruggedness and success of the work-horse EJA-A series with the performance of the thoroughbred EJX-A series to deliver the type of product you have come to expect from Yokogawa.

The EJA438E is a gauge pressure transmitter with a remote diaphragm seal in the series.

EJA438E Standard features include:

  • ± 0.2% Accuracy
  • 200 ms Response Time
  • Exida and TUV SIL2 / SIL3 Certified
  • Local Parameter Setting (LPS)
  • 10-segment Signal Characterizer
  • Active Capillary Fill Fluid Density Compensation

Our Main Business on :EJA430E EJX430A EJA438E EJX438A EJA440E EJX440A EJA530E EJX530A EJX630A EJXC40A EJXC80A, EJAC80E (Diaphragm Seal) EJXC80A, EJAC80E (Direct Mounted) EJXC50A, EJAC50E…All the Yokogawa Gauge Pressure Transmitter we sell Made in Japan! 100% Original!


Plants run better with Yokogawa differential pressure transmitters.

At it’s heart, Yokogawa’s differential pressure transmitter with DPharp digital sensor offers the performance and device intelligence needed to get greater insight into your process.

Digital Performance

Yokogawa’s DPharp digital sensor offers twice the performance and stability of the competitor’s analog sensors. The DPharp uses the latest in IC Chip-style design and manufacturing technology. Analog sensors are based on older design technology. Although analog sensors are good, the modern DPharp sensor out performs them. A Yokogawa transmitter with DPharp digital sensor will give you the consistentreliableaccurate measurement you need.

Poor Performance = Lost Money

Superior Design

All remote seal system on the market use fill fluid to ‘transmit’ the process pressure from the remote diaphragm seal to the pressure sensor in the transmitter. The physical properties of the fill fluid change has process temperature and ambient temperature change causing the transmitter to measure inaccurately. This effect get worse the longer the capillaries are. The key is to filter out this ‘noise’ to get an accurateconsistentreliable measurement. Yokogawa has a superior design, manufacturing process, and features to reduce this ‘noise’. See FieldGuide FGP-340 YokogawaDiaphragm Seal Transmitter (DFS) for details. It is available under the Download tab above.

Poor Performance = Lost Money

Signal Characterization

Signal characterization is a versatile function available on all Yokogawa pressure transmitters. The function is used to compensate the analog 4 to 20 mA output signal for non-linear applications. Such applications include tank strapping or flow measurements; but, it can be used in any application where the relationship between the pressure input and the desired output signal are known. This feature can use up to 10-points. See FieldGuide FGP-150 Signal Characterization for details. It is available under the Download tab above.

Greater Flexibility = Found Money


Yokogawa differential pressure transmitters help plants run longer.

Yokogawa’s Inherently Safe DesignProven Technology, and Rugged Construction allow users to run their plants safer and with less downtime.

Rugged Construction

Ruggedly constructed differential pressure transmitter can help your plant reduce failures. Yokogawa’s DP transmitters have construction features that are designed to allow it to outlive your plant. Four-bolt pressure retaining design, Active DPharp sensor, and dual seal certified to ANSI/ISA 12.27.01 – all design features to extend the life of the transmitter.

Ruggedness = Reliability

Proven Technology

Starting with a clean sheet of paper, Yokogawa developed in the early 1990s a completely new pressure sensing technology – the DPharp sensor. Yokogawa made a large commitment of resources and money in its development. That dedication paid off and by late 2015, there are over 9 million installed Yokogawa transmitters and calibrators worldwide using this technology. The DPharp sensor is a proven technology.

Less Downtime = Making Product

Inherently Safe

All Yokogawa EJA-E series pressure transmitter are designed and certified to IEC61508:2010 Parts 1 through 7 and IEC61511:2004 Parts 1 through 3. They are certified for single transmitter use in SIL 2 rated safety applications and dual transmitter use in SIL 3 rated safety applications with no special option required. With Yokogawa EJA-E transmitters, no longer will you have to maintain two separate inventories – one for production applications and one for safety applications. How much will that save your company? The certificates are available under the “Download” tab above.

Inherently Safe = Reliability


Routine maintenance is easier with Yokogawa differential pressure transmitters.

Efficient and effective maintenance through Extended Calibration Check IntervalsStandard Communication Protocols, and Multiple Communication Options.

Extended Calibration Check Intervals

Yokogawa EJA-E series pressure transmitters have a long-term stability of ±0.1% per 7 years under all operational conditions. As you gain experience with these transmitters, you will be able to extend the time between calibration checks. Long-term this can help reduce your maintenance cost by up to 33%. Spend your time where it is needed.

Quicker Maintenance = Less Downtime

Standard Communication Protocol

Yokogawa transmitters support all industry standard field device communication protocols. Interoperability and interchangeability can be ensured. Use all the same tools and work procedures as before. Yokogawa transmitters are available with analog 4 to 20mA signal with either BRAIN® digital protocol or HART® digital protocol; Low Power analog 1 to 5 VDC with HART® digital protocol; or all digital FOUNDATION® Fieldbus or PROFIBUS® PA protocol.

No Learning Curve = Smooth Change Over

Multiple Communication Options

Save Time, Save Money. Yokogawa offers the FieldMate / LPS platform to help you communicate and track your pressure transmitters. FieldMate is a Windows based communication suite that can be loaded onto a standard PC, laptop, or tablet computer. It can assist you in managing your entire instrument inventory. FieldMate HHC is a traditional hand-held communicator that allows you to communicate with transmitters in the field. If you forget your HHC, the LPS feature of your Yokogawa transmitter allows you to update 9 parameter without the HHC.

Quicker Maintenance = Less Downtime


EJA438E Overview

Measurement Types
Primary Variable Gauge Pressure
Reference Accuracy
Primary Variable ±0.2% of Span
Response Time
Primary Variable 200 ms
Specification Conformance
EJA-E Series ±3σ


EJA438E Process Connections

Process connection Type Size Extension Flange
eja118w Flush Type 3-inch
N/A JIS 10K, 20K, 40K, 63K
ANSI 150#, 300#, 600#
JPI Class 150, 300, 600
DIN PN10/16, 25/40, 64
eja118n Extended Type 4-inch
JIS 10K, 20K, 40K,
ANSI 150#, 300#
JPI Class 150, 300
DIN PN10/16, 25/40

EJX438A PC.a

EJA438E Capsules





Yokogawa offers a full line pressure accessories.

Flushing Ring

A flushing ring a round device that is place between the diaphragm seal and the process connection. The device has two 1/4-inch ports that can be used to run a flushing solution across the face the seal to clean it. If you need a different size port, Yokogawa also offers Flushing Rings supplied by a global partner WIKA.


Yokogawa manufactures a communicator for your needs. Yokogawa communicators are available for BRAIN Protocol, HART Protocol, FOUNDATION Fieldbus, PROFIBUS PA, ISA100, or Modbus. All out communicators are compatible with Yokogawa products as well as other products on the market.

Remote Indicators

Yokogawa offers a range of loop powered and FOUNDATION Fieldbus remote indicators that can be used to locally monitor data from field instruments installed in difficult to access locations.