Multi-Variable Mass Flow Calculation Setup

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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

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*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.

Zugehörige Produkte & Lösungen


Der Messumformer misst Differenzdruck, statischen Druck und Prozesstemperatur mit größter Genauigkeit und berechnet auf dieser Grundlage den Massenstrom, wobei der integrierte Hochleistungsdurchflussrechner voll kompensierte Werte liefert.


Dieser Messumformer wurde speziell für hohe statische Drücke entwickelt. Er misst Differenzdruck, statischen Druck und Prozesstemperatur mit größter Genauigkeit und berechnet auf dieser Grundlage den Massedurchfluss, wobei der leistungsstarke, integrierte Durchflussrechner voll kompensierte Werte liefert.


Das Softwaretool FlowNavigator (FSA120) hilft Ihnen, die multivariablen Messumformer EJX910A und EJX930A optimal zu nutzen, denn es erlaubt Ihnen, den Durchflusskoeffizienten, Öffnungsverhältnis, einlaufseitiger Innendurchmesser der Prozessleitung, die Expansionszahl sowie die zur vollständigen Kompensation und dynamischen Berechnung des Massedurchflusses erforderlichen Werte für Dichte und Viskosität zu konfigurieren.

Mobile Field Device Management (FieldMate)

FieldMate 3.0 is a PC based tool that enables you to see intelligent field devices clearly, know their condition in advance, and act with agility throughout maintenance work flow.


Have Questions?

Contact a Yokogawa Expert to learn how we can help you solve your challenges.