Yokogawa Gauge Pressure Transmitter

Yokogawa’s Gauge pressure transmitters are available in traditional mount and in-line configurations. Both configurations offer accurate repeatable readings.

Since this type of transmitter references atmospheric pressure, their output can be affected by changes in local atmospheric pressure.

Our Main Business on :Gauge Pressure 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!

Which Series Gauge Pressure Transmitter is Right for You?

  • EJA430E

    EJA430E thumbnailTraditional-mount Gauge Pressure Transmitter based on the EJA-E series.


  • EJX430A

    EJX430A thumbnailTraditional-mount Gauge Pressure Transmitter based on the EJX-A Series.


  • EJA438E

    EJA438E thumbnailGauge Pressure Transmitter with Remote Diaphragm Seal based on the EJA-E Series.


  • EJX438A

    EJX438A thumbnailGauge Pressure Transmitter with a Remote Diaphragm Seal based on the EJX-A Series.


  • EJA440E

    EJA440E thumbnailTraditional-mount High Gauge Pressure Transmitter based on the EJA-E Series.


  • EJX440A

    EJX440A thumbnailTraditional-mount High Gauge Pressure Transmitter based on the EJX-A Series.


  • EJA530E

    EJA530E thumbnailIn-Line Mount Gauge Pressure Transmitter based on the EJA-E Series.


  • EJX530A

    EJX530A thumbnailIn-Line Gauge Pressure Transmitter based on the EJX-A Series.


  • EJX630A

    EJX630A thumbnailIn-Line Mount High Performance Gauge Pressure Transmitter based on the EJX-A Series.


  • EJXC40A

    EJXC40A thumbnailDigital Remote Sensor (DRS) Transmitter connects two pressure sensors, master (high pressure side) and slave (low pressure side) in a remote location, with DRS dedicated communication cable to measure differential pressure.


  • EJXC80A, EJAC80E (Diaphragm Seal)

    EJXC80A, EJAC80E (Diaphragm Seal) thumbnailDiaphragm Seal System consists of gauge pressure or differential pressure transmitter with one or two diaphragm seal.


  • EJXC80A, EJAC80E (Direct Mounted)

    EJXC80A, EJAC80E (Direct Mounted) thumbnailDirect Mounted Diaphragm Seal System consists of gauge pressure or differential pressure transmitter with single direct mount diaphragm seal.


  • EJXC50A, EJAC50E

    EJXC50A, EJAC50E thumbnailDirect Mounted Diaphragm Seal System consists of gauge pressure or differential pressure transmitter with single direct mount diaphragm seal.

Gauge Pressure Details  :

EJA-E SeriesEJX-A Series
EJA-E SeriesEJX-A Series
Accuracy
± 0.025%
± 0.040%
± 0.055%
± 0.065%
Stability
± 0.1% of URL per 10 years
± 0.1% of URL per 7 years
± 0.1% of URL per 5 years
Response Time
90 msec
300 msec
Mounting
Traditional-mount
In-line Mount
Safety
FMEDA Report
IEC 61508 Certified (SIL 2)
Specification Conformance
±3σ

Gauge Pressure Resources

Introduction

Level transmitter configuration can be very time consuming. Calculations required to determine proper range values for traditional transmitters can become complex due to the physical layout of an application.

With maintenance shops getting smaller, finding equipment that allows us to do more with fens becomes a priority. DPharp transmitters with advanced software functionality can eliminate these complex calculations.

Application

Using typical smart or conventional products, all the following must be considered:

The specific gravity of the processSGP
Precise location of 0% and 100%

Specific Gravity of the capillary fill fluid
(or sealing fluid used in impulse piping)

SGFF
Exact orientation oi the transmitter to the vesselH2
Vertical distance between the process conn.H1

Depending on the application, the vessel may be open (referencing atmosphere) or closed (under a blanket pressure).

Elevation is typically used when the vessel is closed. To reference the blanket pressure, a low side remote seal may be used (or a wet leg). The capillary on remote seal creates a negative force on the transmitter equal to the vertical height times the specific gravity of the fill fluid.

Elevation = (H1 + H2) x SGFF

Suppression is a positive pressure created on the high-pressure side of the transmitter typically due to the transmitter being positioned below the 0% process connection. Suppression is present in both open arid closed vessels. Suppression is equal to the vertical distance between the 0% process connection and the transmitter times the Specific Gravity of the fill livid.

Suppression = H2 x SGFF

Span is the vertical distance between the process connections times the process medium’s Specific Gravity.

Span = H1 x SGP

Figure 1: Closed Tank
Figure 1: Closed Tank

Now that you have the ElevationSuppression, and Span, the calibration values can be calculated for the 0% (Empty) arid the 100% (Full).

Cal Value (0%) = Suppression – Elevation

Cal Value (100%) = (Suppression + Span) – Elevation

Example: (using figure 1)

SGP0.9H210 inches
SGFF0.8H120 inches

Cal Value 0%) = Suppression – Elevation
Cal Value (0%) = (H2 x SGFF) – (H1 + H2 x SGFF)
Cal Value (0%) = (10 x 0.8) – (20 + 10) x 0.8
Cal Value (0%) = 8 – 24
Cal Value 0%) = -16 inH2O

Cal Value (100%) = (Suppression + Span) – Elevation
Cal Value (100%) = ((H2 x SGFF) + (H1 x SGP)) – (H1 + H2) x SGFF
Cal Value (100%) = ((10 x 0.8) + (20 x 0.9)) – (20 + 10) x 0.8
Cal Value (100%) = (8 + 18) – 24
Cal Value (100%) = +2 inH2O

Therefore, Calibrated Range would be:

-16 inH2O +2 inH2O
0%100%
EmptyFull