EJX910A Multivariable Transmitter

The EJX-A series is Yokogawa's premium performance line of DPharp transmitters. Released in 2004, it offers the performance and stability needed in demanding applications. The EJX-A series performance makes it the thoroughbred of the DPharp family of pressure transmitters.

The EJX910A multivariable transmitter is a remarkable innovation in multi-sensing technology. It makes optimal use of the unique characteristics of the DPharp sensor to give you greater insight into your process.

EJX910A features include:

Mass Flow Version:

  • ±1.0% mass flow rate accuracy
  • Fully compensated mass flow
  • Mass Flow Totalizer with ±1.0% accuracy
  • Pulse / Contact output
  • TUV SIL 2/3 Certification

Multi-Sensing Version:

  • ±0.04% Differential Pressure Accuracy
  • ±0.1% Static Pressure Accuracy
  • ±0.9°F External Temerature Accuracy
  • TUV SIL 2/3 Certification

Explore how the EJA910A can help you Boost your bottom line.

At it's heart, Yokogawa Differential Pressure Transmitter with DPharp sensor offers the performance and device intelligence needed to get greater insight into your process.

Plants run better (1)

Digital Performance






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Self Diagnostics



Yokogawa's DPharp active sensor, patented back check diagnostic, and rugged construction allow users to run their plants safer and with less downtime.

Plant run longer (1)

Rugged Construction



Proven Technology



Inherently Safe




Yokogawa's DPharp pressure transmitters offer long-term stability and diagnostics to make your maintenance routine easy.

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Quicker Maintenance




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 No Learning Curve



EJX910A Overview

Measurement Types
Variable Mass Flow
Differential Pressure (DP)
Static Pressure (SP)
External Temperature (from RTD)
Reference Accuracy
Mass Flow ±1.0% of Range
DP ±0.04% of Span
SP (Absolute) ±0.1% of Span
External Temperature ±0.9°F
Long Term Stability (All Normal Operating Conditions)
DP ±0.1% of URL per 10 years
Response Time
DP L-Capsule: 230 ms
M and H capsule: 200 ms
SP All Capsules: 200 ms
Maximum Pressure Limit (MWP)
L-Capsule 2,300 psi
M and H Capsule 3,600 psi
Over-pressure Effect
DP ±0.03% of URL
Specification Conformance
EJX-A Series ±3σ
Burst Pressure (Absolute)
All Capsules 10,000 psi


EJX910A Communication Protocols

HART Protocol

  • 1.0% mass flow rate accuracy over 1:10 flow range
  • Simultaneous dual output of 4 to 20mA and pulse signals
  • HART protocol revision selectable from HART 5 or HART 7
  • SIL 2 certified standard

FOUNDATION Fieldbus Protocol

  • 1.0% mass flow rate accuracy over 1:10 flow range
  • Various function blocks available: 5 AIs, AR, IT, SC, and IS standard
  • PID is an optional feature
  • Cyclically displays up to 10 values

Modbus Protocol

  • RS485 Modbus protocol provides easy multi-sensing data transmission to flow computers
  • The process data status is provided for each measured variable: Differential Pressure, Static Pressure, and Process Temperature - making it easy to implement process data diagnosis
  • Cyclically display up to 16 variables including RTU management data
  • Up to 32 transmitters can be connected by multi-drop communication
  • 32 character tag and squawk are supported for easy identification of transmitters

FieldMate FlowNavigator™

FieldMate FlowNavigator™ is a PC-based software that is exclusively designed for use with the EJX910A / EJA930A. It uses FDT/DTM standards to enable users to configure mass flow and achieve accurate measurements with real-time full density compensation.




For Differential pressure transmitters, Yokogawa offers a complete line of IEC 61518 compliant 3-Valve and 5-Valve manifolds. Available in T-Style, H-Style, Wafer-Style, and Bottom Process Connection Style and can be ASME B31.1 (Power) Compliant, ISO 15848 Compliant, or TA-Luft Compliant.

Learn More

3rd Party RTD Sensors and Thermowells

TSD (1)


Direct-immersion RTD sensor (Thermowells Available)

EJX Multivariable Transmitter(EJX910A/EJX930A)

Installation cost is reduced with a multi-variable transmitter. The EJX multi-variable transmitter combines three process variables in one transmitter. It removes the need to install a separate gauge pressure transmitter, temperature transmitter and flow computer. Dedicated software for configuring the flow calculation is available (FieldMate – Flow Navigator).


Customer Issues

  • Installation cost of multiple field devices is high.
  • Mass flow measurement is expensive.


Utilize EJX910A/930A + Flow Navigator

  • From one multi-variable transmitter, you can measure differential pressure, static pressure, temperature and mass flow. The total cost is greatly reduced.
  • Flow Navigator software provides a simple, user friendly method to configure the mass flow measurement.

Three in One


Utilize FieldMate

  • Flow Navigator has a step by step interface based on FDT/DTM technology. You can set the data by simply selecting the primary element, and inputting the flow rate information.
  • You can copy the configuration of one transmitter to another transmitter to help with multiple configurations.

Utilize FieldMate


EJX Multi-Variable Transmitter Outputs

① In the case of HART digital / FOUNDATION Fieldbus /Modbus, these types of outputs can transmit multi process values at the same time.

② In the case of Analog signal (4-20mA), a multiplexer can be used to convert up to three values from HART signals into 4-20mA signals. The transmitter can transmit up to four values in conjunction with the original signal.

③ In the case of ISA100(wireless), the ISA 100 adaptor can transmit up to four values from the HART signal without reconstructing an existing line.

EJX Multi-Variable Transmitter Outputs

The measurements that EJX multi-variable transmitter can transmit




Other TEMP


Total Flow *4

either H or L

Flange (/DG6)
FOUNDATION Fieldbus *2
either H or L, or both

Flange (/DG1)

Modbus *3

either H or L

- -

*1:In 4-20mA, output is one signal by one value。In HART, output is one signal by multiple value (up to four value).
*2:Number of output values is up to five.
*3:Flow, total flow, other temperature(flange)as output are not supported.
*4:Total flow is using HART or the pulse signal. 4-20mA signal is not supported. In FOUNDATION fieldbus, output is using IT function block.

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Instruction Manuals
General Specifications
Technical Information

Training Videos

Product Overviews


    Yokogawa presents a brief tutorial on configuring Stardom RTU to communicate with EJX Multivariable Pressure and Temperature transmitter via Modbus RTU over RS485. Appropriate function blocks and settings within Logic Designer are covered in order to read in the primary three variables DP, SP, and Temperature. Also a quick review of FieldMate and Kepware OPC Server are shown as examples of ways to review and change the settings of the EJX 910 Modbus MV transmitter.

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