This Yokogawa e-learning module covers a basic overview of DPharp pressure transmitters. You will learn. 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  ‎Differential Pressure · ‎Gauge Pressure · ‎Absolute Pressure · ‎Liquid Level. Yokogawa Electric has developed the DPharp EJX Series of differential pressure and pressure transmitters. The new transmitters will be added to the current.


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The transmission unit consists of a electronic unit and a terminal box, which can be used for every model in the EJX series.


This unit contains a digital LCD, through which users can monitor differential pressure and static yokogawa pressure transmitter signals. Pressure-receiving Unit Figure 9 Yokogawa pressure transmitter Circuit Block Diagram shown for a single resonator only In order to realize a differential pressure transmitter that is immune to temperature effects and can perform stable measurement, focus was placed on the design effort to minimize the amount of fluid sealed in the pressure-receiving unit.

Differential Pressure Flow Transmitters

By adopting the new overpressure protection mechanism mentioned above, we were able to reduce the amount of fluid by a factor of yokogawa pressure transmitter, compared with that of the EJA series.

The pressure-receiving unit features a symmetrical structure resistant to the effects of various external pressure disturbances. The amounts of high- and low-pressure side fluid within the capsule are well balanced so that effects due to the expansion or compression of the internal fluid caused by temperature or static pressure changes are minimized.

Highly nikkel alloy, an industry-proven highly corrosion- resistant yokogawa pressure transmitter used for the EJA series, is also used for the seal diaphragms. There are no welded parts exposed to the atmosphere.

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  • Description
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Universal mounting Pressure transmitters on the market have several different flange configurations depending on the medium being measured gas or liquid. This requires plants that process both mediums to maintain yokogawa pressure transmitter stock of both types of configurations.

Yokogawa's pressure transmitters yokogawa pressure transmitter a universal mount that can be configured to handle either gas or liquid; reducing your inventory of replacement transmitters.

Rugged Construction Harsh environments can reduce the life of your instrumentation, causing maintenance issues and plant downtime.

EJAA Differential Pressure Transmitter | Yokogawa India

These design yokogawa pressure transmitter extend the life of your transmitter, increasing yokogawa pressure transmitter availability. Overpressure Protection During improper manifold sequencing, startup and shutdown conditions, or process upsets, overpressure can occur. Once stable process conditions return, these features enable the transmitter to return to normal operation within the published specifications.

Differential pressure and pressure transmitters measure the flow of gases, steam and liquid, and tank level, and are the most common type of sensors used for this purpose.

The evolution of the silicon resonant sensor has enabled the simultaneous measurement yokogawa pressure transmitter differential pressure and yokogawa pressure transmitter pressure with a single sensor. This is a world first. As standard, all Yokogawa transmitters are certified for single transmitter use in SIL 2 safety applications and dual transmitter use in SIL 3 safety applications.

Managing two separate transmitter models is no longer necessary, reducing spares inventory and simplifying daily operations.

Gauge Pressure | Yokogawa Electric Corporation

Extended yokogawa pressure transmitter check intervals When devices are initially installed, they operate at peak performance, but what happens after they are running under various process conditions and poorly managed or maintained? Changing operating conditions can cause transmitters to drift to the point where they are no longer able to make accurate measurements for the process loop they are yokogawa pressure transmitter in, resulting in poor quality or an impact to product yields.

As you gain experience with these transmitters, the interval between calibration checks is extended.

Spend your time where it is needed. Independent third-party verification With the rapid globalization of markets, numerous international standards and approvals are becoming necessary. Note that frequency signals from the resonator are asynchronous to the reference clock of the counter circuit.

For this reason, time periods fractional lengths of time that are shorter than that of the reference clock and therefore cannot be measured, occur at both yokogawa pressure transmitter of the sampling time interval in the case of yokogawa pressure transmitter reciprocal method based counter circuit employed for the EJA series.

If the sampling time is shortened in order to realize high- speed computation processing without speeding up the reference clock, this error is intensified, worsening the resolution of the counter circuit.

Hygienic Pressure Transmitters

If the reference clock is yokogawa pressure transmitter speeded up, the current consumption will increase, thus failing to satisfy the product specifications. In addition to the conventional reciprocal method, the EJX series employs yokogawa pressure transmitter time expansion method2 in which these fractional lengths of time are extended by a factor of 64 and then measured.

With the time expansion method, we have been able to achieve low power consumption and high speed, as well as high resolution five times or more superior to that of the conventional series, by taking additional measures such as the inclusion of a dedicated counter.

Built-in Display Figure 11 View of Built-in Display In consideration of the importance of ease of perception, the built-in display has been enlarged while the EJX series as a whole has been downsized Figure A bar graph, process value, exponent and unit have been added to the existing yokogawa pressure transmitter to be shown on the display.