HHXA-EJA210E Flange Mounted Differential Pressure Transmitter

Flange Mounted Differential Pressure Transmitter is also called single flange DP level transmitter. For liquid, gas or vapor pressure measurement.

Flange Mounted Differential Pressure Transmitter also called DP level transmitter/pressure level transmitter. The smart differential pressure transmitter/pressure transmitter is provided with a diaphragm seal. Realize the measurement of liquid level. 4-20mA output. Flange Mounted Differential Pressure Transmitter is flange mounted. The isolation diaphragm is very thin and is a weak link in corrosion resistance. So, the material of the wetted diaphragm is 316L, Hastelloy C-276, Monel, tantalum. Suitable for anti-corrosion requirements in different situations. It can be reasonably selected according to the measured medium concentration, humidity, pressure, and other parameters.

Sino-Inst offers a variety of flange-mounted DP transmitters for industrial pressure measurement. If you have any questions, please contact our sales engineers.

HHXA-EJA210E Flange Mounted Differential Pressure Transmitter Description:

The high-performance flange mounted differential pressure transmitter HHXA-EJA210E can be used to measure levels of densities of solidifying or precipitating liquids. The HHXA-EJA210E single-flange differential pressure transmitter can also communicate with the HART275/475 Communicator to set and check it. Outputs a 4 to 20 mA DC signal, corresponding to the measured differential pressure. HHXA-EJA210E single flange differential pressure transmitter uses advanced micro-processing technology and digital communication technology. Besides all the functions of conventional intelligence. It also has a series of enhanced functions. Such as zero-point automatic adjustment, remote local control parameter viewing, and adjustment control parameter password lock. At the same time, remote parameter setting, remote control, self-diagnosis, and other functions are performed through the Fieldbus HART protocol.

The HHXA-EJA210E is the Flange-mount Liquid Level Transmitter in the H&HXA-EJA series. Rosemount 3051 and Yokogawa EJA functional alternatives. We also supply an SMT3151LT Differential pressure level transmitter for level measurement.

Extended reading: How to calibrate HART pressure transmitters

HHXA-EJA210E Flange Mounted Differential Pressure Transmitter Features:

The single flange level gauge is an extension and development of the pressure transmitter technology. According to the principle that the pressure generated by the liquid of different specific gravity at different heights has a linear relationship. The realization of the volume, liquid height, water, oil and paste Accurate measurement and transmission of weight.

  1. Innovative indication, intuitive reading and eye-catching. The direction of the observation indicator can be changed according to user needs.
  2. The structure is simple: there are no movable or elastic elements. Therefore, the reliability is extremely high. The amount of maintenance is very small.
  3. Easy installation: the built-in structure especially shows this feature. No special tools are required.
  4. Convenient adjustment: the two potentiometers of zero position and range can arbitrarily carry out zero point migration or range change within the effective range of liquid level detection. The two adjustments do not affect each other.
  5. Widely used: It is suitable for liquid level measurement of high temperature, high pressure, strong corrosion and other media.
  6. Large measuring range. Not limited by the height of the storage tank.
  7. The indicator mechanism is completely isolated from the measured medium. It has good sealing, high reliability and safe use.
  8. With intrinsically safe explosion-proof and isolation explosion-proof capabilities. Can be used in various hazardous locations
  9. With anti-blocking design, it can measure the liquid level of the pasty medium.
  10. Fine and unique zero point, full range, non-linear compensation. To ensure the accuracy of the instrument within the scope of use conditions, long-term stability.

Extended reading: Smart Differential Pressure Transmitter

HHXA-EJA210E Flange Mounted Differential Pressure Transmitter images

Specification of Yokogawa HHXA- EJA210E Flange Mounted Differential Pressure Transmitter

ModelTransmitter type
HHXA- EJA210Flange liquid level transmitter
CodeScale range
CodeOutput form
ELinear output 4-20mAdc
SFLinear output 4-20mAdc +HART signal
FMODBUS-485 signal
CodeFlange standard (high pressure side flange)
AANSI American Standard (HG20615)
DDIN European Standard (HG20592)
CodeProcess connection size
ANSI American Standard (HG20615)DIN European Standard (HG20592)
CodeProcess connection pressure rating
ANSI American Standard (HG20615)DIN European Standard (HG20592)
CodeHigh pressure side diaphragm
A316 stainless steel
BHastelloy C
FSpecial Requirements
CodeHigh pressure side insert tube lengthHigh pressure side insert cylinder material
A0 mmNone
B50 mm316L Stainless steel
C150 mm316L Stainless steel
D200 mm316L Stainless steel
CodeHigh pressure side filling fluid
DGeneral silicone oil  (-40~104℃)
FHigh temperature silicone oil   (-40~304℃)
SInert liquid  (-40~204℃)
Low pressure side structural materialFlange (joint)Exhaust/drain valveIsolation diaphragmSensor filling fluid
22316 Stainless steel316 Stainless steel316 Stainless steelSilicone oil
23316 Stainless steel316 Stainless steelHastelloy CSilicone oil
24316 Stainless steel316 Stainless steelMonelSilicone oil
25316 Stainless steel316 Stainless steelTantalumSilicone oil
33Hastelloy CHastelloy CHastelloy C Silicone oil
35Hastelloy CHastelloy CTantalum Silicone oil
44MonelMonelMonel Silicone oil
S2A remote transmission device (with a remote transmission device on the low-voltage side)
CodeShell materialConduit inlet dimensions
ALow copper aluminum alloy polyurethane coatingM20×1.5
BLow copper aluminum alloy polyurethane coating1/2-14 NPT
CStainless steelM20×1.5
DStainless steel1/2-14 NPT
CodeOptional parts
M10~100%  Linear indicator head
M4LCD multi – power digital display head
D1Side discharge valve at the top (only for the low pressure side of the low pressure side without remote transmission)
D2Side discharge valve at the top (only for the low pressure side of the low pressure side without remote transmission)
DaFlameproof  ExdIIBT5Gb;(explosion-proof certificate no. : CE16.1163)
FaIntrinsically safe ExiaIICT4 / T5 / T6Ga;(explosion-proof certificate no. : CE15.2354X)
CXWith corresponding 316 flushing ring

Extended Reading: Smart pressure transmitter working principle

The high performance flange mounted differential pressure transmitter EJA210E, can be used to measure levels of densities of solidifying or precipitating liquids.
EJA210E outputs a 4 to 20 mA DC signal, corresponding to the measured differential pressure.
Its accurate and stable sensor can also measure the static pressure, which can be shown on the integral indicator. Or monitored via BRAIN or HART communications.
Other key features include quick response, remote set-up using communications and self-diagnostics. FOUNDATION Fieldbus and PROFIBUS PA protocol types are also available.
All EJA-E series models in their standard configuration, except for the Fieldbus and PROFIBUS types, are certified as complying with SIL 2 for safety need.

Read more What is a diaphragm seal?


The single-flange pressure / level transmitter can accurately measure the liquid level and density of various containers. There are two types of flat flange and plug-in flange. It is suitable for high viscosity medium or suspended liquid measurement.

  1. Viscous medium at high temperature;
  2. Easily crystallized medium;
  3. Precipitation medium with solid particles or suspended matter;
  4. Strongly corrosive or highly toxic medium;
  5. It can eliminate the leakage of the pressure guiding pipe and pollute the surrounding environment. It can avoid the instability of the measurement signal when the isolation liquid is used. The tedious work of frequently supplementing the isolation liquid is required;
  6. Continuously and accurately measure the interface and density;
  7. The remote transmission device can avoid the mixing of different instantaneous media, so that the measurement results truly reflect the actual situation of process changes;
  8. Places with high sanitation requirements;
  9. Such as in the production of food, beverage and pharmaceutical industries. Not only the transmitter contacting the media parts meet the hygienic standards, but also should be easy to wash. To prevent cross-contamination of different batches of media.

Pressure level transmitter is good for level measurement. Most of the time, we use submersible hydrostatic level sensor for the level measurement. When you can not use the probe of hydrostatic level sensor, you can try with this pressure level transmitter. Pressure level transmitter, is one type of DP level measure instrument, with the diaphragm.


SMT3151LT Differential pressure (DP) level transmitter a new type of differential pressure (DP) transmitter produced by advanced technology and equipment. Continuous level, flow and differential pressure measurement. Liquid level measurement, is the most common measurement process in continuous production processes, such as: petroleum and chemical industry. The liquid level measuring instrument currently widely used, is the differential pressure level transmitter.


Working principle of Smart differential pressure transmitter

1. Head cover 2. Head 3. Metal bulkhead 4. Shell 5. Nameplate label 6. Explosion-proof joint 7. Terminal block 8. Head cover 9. Drain valve 10. Bolt 11. Clamp 12. Sensor seal 13. Sensor 14. Nut 15. Welded pipe joint assembly

SMT3151DP intelligent differential pressure transmitter uses advanced microprocessor technology and digital communication technology. The basic principle of differential pressure transmitter is: divide a space with sensitive elements (multi-purpose capsule) into two chambers. Introduce pressure into the two chambers separately. The sensor produces displacement (or displacement trend) under the combined action of the two pressures. This displacement is proportional to the pressure difference (differential pressure) between the two chambers. Convert this displacement into a standard signal output that can reflect the magnitude of the differential pressure.

You may like: differential pressure transmitter working principle|Working Principle of pressure level transmittersdifferential pressure level transmitter working principle

Single flange. VS. Double flange differential pressure level transmitter

  1. In principle: all are differential pressure transmitters + flange guide pressure;
  2. In terms of structure: the single flange liquid zd position transmitter has only one flange diaphragm box connected to the high pressure side, and the low pressure side to the atmosphere. The double flange liquid level transmitter is high and low pressure side through oil-filled capillary It is connected with two flanged membrane return boxes. There is also a capillary. The single flange transmitter is installed below, and a capillary is drawn from the low pressure side of the single flange transmitter to the upper flange membrane box.
  3. In terms of engineering applications: all can only measure the liquid level of fixed density. The single-flange transmitter can only be used for the liquid level of atmospheric equipment that can be imagined with the atmosphere. The double-flange transmitter can be suitable. Answer: Use closed equipment kettle to measure liquid level;
  4. From the economical point of view, the double flange is definitely more expensive than the single flange. After all, there is one more flange capsule and capillary.

How to choose flange type liquid level transmitter?

Flange level transmitters often require special environmental processing during production. Requires small range and high accuracy. Flange level transmitters are also required to withstand high temperature, corrosion resistance and high overload withstand capability. Therefore, the scope of application must be clearly defined when selecting the flange type liquid level transmitter.

When choosing a flange-type liquid level transmitter, the following factors are mainly considered:

  1. The measurement object, such as the physical and chemical properties of the measured medium. And working pressure and temperature, installation conditions, speed of liquid level change, etc .;
  2. Measurement and control requirements. Such as measurement range, measurement accuracy, display method. On-site instructions, long-distance instructions, interface with computer, safety and anti-corrosion. Reliability and construction convenience.

When selecting a double-flange differential pressure transmitter, a very important factor must be paid attention to is the differential pressure level transmitter. It is installed at the bottom of the liquid container. The height of the liquid level is reflected by the gauge pressure signal. In the control process of liquid level measurement in the pharmaceutical and chemical industries. The container holding the liquid is often under pressure. At this time, the conventional static pressure liquid level transmitter cannot meet the measurement requirements. Due to improvements in the sensor circuit and structure. Improve the practical value of differential pressure liquid level measurement technology in the pharmaceutical and food industries.

Piezoresistive Differential Pressure Transmitter
Piezoresistive Differential Pressure Transmitter utilizes the piezoresistive effect of semiconductor silicon materials. Realize accurate measurement of differential pressure.
Smart Differential Pressure Transmitter
Smart Differential Pressure Transmitter measures industrial differential pressure. Can Works with diaphragm seals, capillary, HART. Outputs standard signals (such as 4 ~ 20mA, 0 ~ 5V).
Diaphragm Seal Pressure Transmitter
When the process medium should not come into contact with the pressured parts of the measuring instrument. Diaphragm sealed pressure transmitters are used for pressure measurement.
High-Temperature Pressure Transmitter
High-temperature pressure transmitters with a 4-20mA output.
which has a temperature capability of over 850 °C and is not pyroelectric.

Sino-Instrument is one of the most excellent DP transmitters, pressure transmitters and level transmitters suppliers. Sino-Instrument can offer you a complete solution of pressure transmitter.

We all know that the Yokogawa EJA210E Flange Mounted Differential Pressure Transmitter, which commonly used in liquid, gas or vapor pressure measurement.

Sino-Instrument can offer you with HHXA-eja110e\ HHXA-eja530e \ HHXA-eja210a\ HHXA-jx210a. Our transmitters can work for you just like yokogawa level transmitters.

To know how the HHXA-EJA210E can help you Boost your bottom line.

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This entry was posted in Pressure, Diaphragm Seal, DP Transmitters by KimGuo11. Bookmark the permalink.

About KimGuo11

Wu Peng, born in 1980, is a highly respected and accomplished male engineer with extensive experience in the field of automation. With over 20 years of industry experience, Wu has made significant contributions to both academia and engineering projects. Throughout his career, Wu Peng has participated in numerous national and international engineering projects. Some of his most notable projects include the development of an intelligent control system for oil refineries, the design of a cutting-edge distributed control system for petrochemical plants, and the optimization of control algorithms for natural gas pipelines.