Monthly Archives: April 2019

SMART HART Pressure Transmitter

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HART pressure transmitter

HART pressure transmitter is an SMART pressure measurement product. It is compatible with analog two-wire 4~20mA signals and HART protocol.

Users can use HART communicator to manage, adjust or monitor process variables of HART instruments running in the process. It can also be configured on site using buttons for easy operation.

3051 HART Smart pressure transmitter that provides simplified field change, while communicating asset management data utilizing the latest HART 7 specification.

Sino-Inst offers a variety of HART pressure sensors for industrial pressure measurement. If you have any questions, please contact our sales engineers.

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What is a hart in a pressure transmitter?

What is a communication protocol? A communication protocol refers to the specification for data exchange between different devices. In a pressure transmitter, a communication protocol is used to achieve data transmission between the transmitter and other devices.

HART is a digital communication protocol used for communication protocols between field intelligent instruments and control room equipment. The HART protocol can establish two-way communication between a 4-20mA sensor and a controller equipped with a two-way HART communication circuit.

Therefore, the pressure sensor can send a digital signal to the controller through the HART protocol. The controller can send commands to the sensor to set and adjust parameters.

The HART communication protocol of the pressure transmitter provides two synchronous communication channels: a 4-20mA analog signal and a digital signal. The 4-20mA signal uses a 4-20mA current loop to transmit the main measurement value.

The HART protocol allows digital information to be transmitted on a 4-20mA transmission loop. Therefore, without adding equipment, the coexistence of digital and analog signals can be achieved.

The HART protocol can simultaneously transmit analog signals and digital signals. Therefore, it is widely used in practical applications.

HART communication uses a digital signal superimposed on the analog signal of the pressure transmitter to transmit other device information of the pressure transmitter.

The digital signal of the pressure transmitter contains information from the device. Including device status, diagnostics, additional measurements or calculated values, etc.

The combination of these two communication channels of the pressure transmitter provides a low-cost, highly reliable, and complete field communication solution for pressure transmitters that is easy to use and configure.

Benefits of HART pressure transmitters

3151 HART pressure transmitter
  • 4mA～20mA DC current output superimposed HART® protocol digital communication (two-wire system);
  • Adopt digital compensation and nonlinear correction technology;
  • -10℃～80℃ digital wide temperature compensation;
  • With local and remote zero and span adjustment functions;
  • Key operation on site for easy configuration;
  • Shorten troubleshooting time from discovery to problem solving;
  • Continuously verify the integrity of loops and control/automation system strategies;
  • Improve asset efficiency and system availability;
  • Quickly determine and verify control loops and device configurations;
  • Use remote diagnosis to reduce unnecessary on-site inspections.

Featured Industrial HART Pressure Transmitters

HART pressure transmitter is a complete product line of liquid level, differential pressure, gauge pressure and absolute pressure transmitter. Models include flushing diaphragms and sanitary flanges for liquid level measurement, hydrostatic tank metering – HTG. And wetted parts of various materials to suit the process requirements.

Diffused silicon Gauge Pressure Transmitter
Diaphragm Seal Pressure Transmitter
SI-390 Industrial Pressure Transmitter
SI-520 Digital Pressure Sensor
Capacitive Gauge Pressure Transmitter
Hydrostatic pressure transmitter
High-Temperature Pressure Transmitter
Absolute Pressure Transmitter

What is a HART transmitter?

HART transmitters are much more complicated.
The HART transmitter has the same pressure input and 4-20 mA output. But it also has an analog current loop output. The device contains some digital variables and settings. Access to these digital parameters requires the use of a HART configurator or communicator. This is essential for maintaining these devices.
Just like Hart Communicator 375.
In fact, many HART devices, cannot be maintained without access to digital parameters.

You may like: Verabar Flow Meter

What is HART calibrator?

HART calibrator is our HART communicator for calibrating instruments. For example pressure transmitter, DP transmitter, liquid level transmitter, flowmeter, and temperature transmitter.
HART communication protocol (Highway Addressable Remote Transducer) is a hybrid analog + digital industrial automation open protocol.
Its most significant advantage is that it can communicate through the traditional 4–20 mA analog instrument current loop, sharing only a pair of wires used by the analog host system.
We use this protocol in the HART calibrator.

HART communicator (such as HART 475) is the most common HART calibrator.
The proprietary calibration process ensures optimal temperature compensation. This limits the thermal impact on the sensor output.
It is suitable for the global process control industry. It provides a cost-effective solution for the use of conventional HART transmitters (such as the HART 475 field communicator).

HART protocol

How to calibrate a pressure transmitter using Hart?

A pressure transmitter is one of the most common instruments in a process plant. To assure its accuracy, it needs to be calibrated.

But what do you need to calibrate it and how is it done?

You may know how to calibrate a pressure transmitter? Or, how to calibrate a differential pressure transmitter? Then, calibrate HART pressure transmitters, kind of like pressure transmitter calibration using a hart communicator. Pressure transmitter manufacturers have improved accuracy and technology, designed into these smart pressure measurement devices.

To calibrate a pressure transmitter, you need:

loop supply (if not connected to the controls system’s loop supply);
a pressure generator to generate input pressure;
an accurate calibrator to measure the input pressure;
an accurate calibrator to measure the output mA current.

Typically, the pressure transmitter is a HART protocol transmitter. So in case, there is any need to adjust/trim it, you will need to use a device supporting HART communication.

How to calibrate HART pressure transmitters?

Explaining how to do the calibration would result in quite a long text. So we have put together a video for you instead. The video shows you how to calibrate and trim a HART pressure transmitter. Please have a look at the video: How to calibrate HART pressure transmitters

Video source: https://www.youtube.com/watch?v=4wLCqH0M9fU&t=9s

HART Pressure Transmitters Calibration Steps

How to calibrate HART pressure transmitters?

Total Time:

1. Isolate the transmitter from the process being measured and its loop wiring.

2. If measuring the mA signal across the transmitter test diode leave the wires intact, but note this method does not give the best mA measurement accuracy.

3. Connect the mA measurement jacks of the 754 to the transmitter.

4. Connect the pressure module cable to the 475, and connect the transmitter test hose from the hand pump to the transmitter.
Press the HART button on the calibrator to see the configuration of the transmitter.

5. Press HART again and the calibrator will offer the correct measure/source combination for the test.

6. If documenting the calibration press As-Found, input the test tolerance and follow the prompts.

7. If the measured mA signal at the test points is found within tolerance the test is complete.
If not, change is required.
Select, adjust, and trim the pressure zero, mA output signal and input sensor.

If you still do not know, how to check the pressure transmitter?  Or, how to calibrate a pressure transmitter.

Just contact us.

More Pressure Measurement Solutions

Sino-Inst offers over 20 SMART HART Pressure Transmitters. About 50% of these are 4-20ma Low-Pressure Transducers, 40% are Differential Pressure Gauge, and 20% are Diaphragm Seal Pressure transmitters, 20% are 4-20ma differential pressure transmitters.

Sino-Inst sells through a mature distribution network that reaches all 50 states and 30 countries worldwide. HART Pressure Transmitter products are most popular in Domestic Market, Southeast Asia, and Mid East.  You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification.

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Diaphragm Seal Pressure Level Transmitter

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SMT3151TLT Pressure Level Transmitter is an economical flange direct-mounted pressure transmitter. An isolation diaphragm box is added as the measuring liquid contact part. One port is connected to the process tank (or pipeline) by flange (or other connection method).
Mainly used to measure high-temperature, easy to solidify or crystallize, containing suspended solids, too viscous, corrosive or other media that need to maintain sanitary conditions and cannot be contaminated.

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Sino-Inst offers a variety of Diaphragm Seal Pressure Transmitters for industrial pressure measurement. If you have any questions, please contact our sales engineers.

Features of Pressure Level Transmitter

  1. Diffusion silicon isolation sensor
  2. Flange installation
  3. Large size diaphragm, fully welded and sealed, long-term reliable and durable
  4. Aluminum alloy junction box with strong seal and good outdoor installation
  5. Used for pressure measurement of gas, liquid and steam
  6. Anti-corrosion metal diaphragm optional
  7. With LCD display optional
  8. Especially suitable for high temperature or viscous liquid
  9. The flange size is customized according to customer requirements. And the installation is flexible and diverse

Read more about Steam pressure transmitter-Pressure measure on steam pipeline 

Specifications of Pressure Level Transmitter

ModelTransmitter type
SMT-3151TLTFlange level transmitter
CodeScale range
2
3
4
5		0-20～100kPa(0-2000～10000mmH2O)
0-70～350kPa(0-7～35mH2O)
0-200～1000kPa(0-20～100mH2O)
0-700～3500kPa(0-70～350mH2O)
CodeOutput form
ELinear output 4-20mAdc
SFLinear output 4-20mAdc+HART signal，Full function buttons on site
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）
251″DN25
401.5″DN40
502″DN50
803″DN80
004″DN100
CodeProcess connection withstand voltage rating
ANSI American Standard (HG20615)DIN European standard（HG20592）
A150LBPN16/25
B300LBPN40
C600LBPN64
D900LBPN100
CodeMeasuring diaphragm
A316 Stainless steel
BHastelloy C
CMonel
DTantalum
ETitanium
FSpecial requirements
CodeInsert barrel lengthInsert barrel material
A0 mmNone
B50 mm316L Stainless steel
C150 mm316L Stainless steel
D200 mm316L Stainless steel
CodeFilling liquid
DOrdinary silicone oil  （-40~104℃）
FHigh temperature silicone oil   （-40~304℃）
SInert liquid  （-40~204℃）
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
M4LCD Multi-function digital display
DaFlameproof  ExdIIBT5Gb;(explosion-proof certificate No. : CE16.1163)
FaIntrinsically safe ExiaIICT4 / T5 / T6Ga;(explosion-proof certificate No. : CE15.2354X)
CXWith corresponding 316 flushing ring

You may like: Explosion Proof Pressure Transmitter for Hazardous locations

Applications for Pressure Level Transmitters

The application which is suitable for diaphragm seal system… For measuring the liquid level, density, flow, and pressure of :

  • High/low temperature fluids
  • Highly corrosive/high viscosity fluids
  • The fluids which may cause clogging of impulse piping in the low temperature
  • Toxic fluids
  • The fluids containing suspended solids which are deposited in the impulse piping and may cause clogging.\

Extended reading: Featured Diaphragm Seal Pressure Transmitters

Diaphragm flange material selection

The biggest advantage of the Diaphragm Seal Pressure Level Transmitter is that different diaphragm materials can be selected. According to different corrosion, media to achieve the best corrosion resistance. The commonly used diaphragm materials are SUS316L stainless steel. Tantalum, Hastelloy, Monel, Pure titanium, F4, etc. 

When choosing a diaphragm pressure transmitter, in addition to the correct choice of structure and range, the more important thing is to choose the material. The so-called reasonable is to consider its corrosion resistance, but also to consider the economy. For example, the corrosion resistance of the tantalum diaphragm and Hastelloy is excellent, but it is expensive. Only used in environments with high corrosivity and other cheap materials are not suitable.

The following table introduces several common corrosion-resistant materials that can be selected for corrosion media. For your reference.

Corrosive mediumTin bronze (QSn6.5-0.4)SUS316Pure tantalum (Ta)Monel (Ni70Cu30)Hastelloy (HC)Polytetrafluoroethylene (F4)
Sulfuric acid (H2SO4)V△○VVV
Nitric acid (HNO3)╳V○╳VV
Hydrochloric acid (HCI)△╳○╳VV
Phosphoric acid (H3PO4)VV○VVV
Acetic acid (CH3COOH)VV○V○V
Caustic soda (NaOH)△○△○○V
Soda ash (Na2CO3)○○○○VV
Baking soda (NaHCO3)V○○○○V
Chlorine (CI)Dry: VDry: V○Dry: VVV
Wet: ╳Wet: ╳Wet: ╳
Bromine (Br2)Dry: △Dry: ╳○Dry: ○○V
Wet: ╳Wet: △Wet: ╳
Ammonia (NH3)╳V╳╳○V
Seawater (30% NaCI)VV○○○V
Explanation of symbols: ○ ——best; △ ——conditional use; V——can be used;

Extended reading: Common Pressure Sensor Applications

What is diaphragm seal pressure transmitter?

The diaphragm seal pressure transmitter is the flange type pressure transmitter. This type of pressure transmitter, assembling diaphragm seals to field transmitters for the purpose of measuring pressure, differential pressure, level, and flow.

What is a diaphragm seal?

Diaphragm Seals, also known as Chemical Seals or Gauge Isolators, are used to isolate pressure instrumentation, like pressure gauges, pressure transmitters, pressure switches, level transmitters, and more from process media that is hot, corrosive, clogging, or otherwise damaging to the pressure instrument.

A diaphragm seal has two primary tasks:

  1. Separation of the measuring instrument from the process medium
  2. Transfer of the pressure to the measuring instrument

You may like: Diaphragm pressure gauge

What is remote seal?

The remote seal is used to prevent the medium in the pipeline from directly entering the pressure sensor assembly in the pressure transmitter. It is connected to the transmitter by a capillary filled with fluid. As a result, they’re often used in refining, petrochemical, and chemical plants.

Extended reading: SI-703 Flush Diaphragm Pressure Sensor

More Pressure Measurement Solutions

FAQ

A pressure level transmitter is a device that works on the principle that static pressure is proportional to liquid level height. It is essentially a device that combines the functions of a pressure sensor and a level gauge.

The transmitter uses an advanced isolated diffused silicon sensitive element or a ceramic capacitor pressure sensitive sensor. The measured static pressure of the liquid is converted into an electrical signal.

This process is temperature compensated and linearly corrected, and the final output is a standard electrical signal, common forms are 4~20mA or 1~5VDC, etc.

Extended reading: Flat Pressure Sensor for High Viscosity Fluids

The pressure gauge is an instrument that uses elastic elements as sensitive elements to measure and indicate pressure higher than the ambient pressure. It is used in almost all industrial processes and scientific research fields.

Pressure transmitter is a device that converts pressure into pneumatic or electric signals for control and remote transmission.

The differences between pressure transmitter and pressure gauge are:

  1. The accuracy of the standard instrument required for pressure transmitter calibration is much higher than the accuracy of the standard instrument required for pressure gauge.
  2. The pressure gauge only needs to calibrate a pair of input and output relationships. The pressure transmitter may need to calibrate the relationship between input and communication data.
  3. Pressure gauge calibration must have corresponding metrological qualifications. Pressure transmitters are generally not required except for production and new construction.
  4. The pressure gauge has poor accuracy and no output. It cannot be operated with a hand operator. Generally, 5 points are calibrated. The back and forth difference is different. The intelligent pressure transmitter generally only needs to calibrate the zero point and full scale.
  5. The output of the pressure gauge is a scale indication, and its own display capability. The pressure transmitter is a current output and must be connected to an ammeter display of the corresponding accuracy level.

Extended reading: extrusion melt pressure transducer

A diaphragm seal system consists of a pressure instrument, a fill liquid, and a diaphragm seal, either direct-mount or capillary.

Diaphragm seals are used to seal and protect instruments from process media. The flexibility of the seal lies in the fact that the diaphragm securely seals the contents and penetrates the instrument to accurately measure pressure.

Diaphragm seals are often used in conjunction with pressure transmitters. This combination can be used in extremely harsh environmental conditions.

The fact that they can isolate instruments from any kind of toxic and reactive chemicals makes them particularly useful devices.

Diaphragm-sealed pressure transmitters are used when the medium is corrosive or will corrode the internal parts of the transmitter (for example, ammonia will corrode the copper in the transmitter).

Extended reading: High accuracy pressure transducers

Sino-Inst is a Pressure Level Transmitters manufacturer in China.

We offer all types of Pressure Level Transmitters. Like Direct Mounted, flange-mounted, single flange, double flange, Remote Diaphragm Seals, High Static, Digital Remote.

Most of our Pressure Level Transmitters are used in oil, liquids, DP transmitter, flow measurement, level measurement (like the ultrasonic level measurement), density, and other process variables.

You can ensure product safety by selecting from certified suppliers, with ISO9001, ISO14001 certification. We will share more about instrument calibration, like the flow transmitter calibration.

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Flange Mounted Differential Pressure Transmitter

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Flange Mounted Differential Pressure Transmitter can be directly installed on the pipe or tank. Based on an ordinary pressure/differential pressure transmitter, a Flush flange or extended flange is added. It can be used for differential pressure measurement and liquid level measurement.

Mainly used to measure high temperature, easy to solidify or crystallize, containing suspended solids, too viscous, corrosive or other media that need to maintain sanitary conditions and cannot be contaminated.

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

CONTACT US
More DP Transmitters

Sino-Inst Flange Mounted Differential Pressure Transmitter uses advanced microprocessing technology and digital communication technology. It outputs a 4 to 20 mA DC signal corresponding to the measured differential pressure. It can also be configured with the HART protocol.

SMT3151LT Flange Mounted Differential Pressure Transmitter can replace EJA210E. It is a functional replacement for Rosemount 3051 and Yokogawa EJA.

Extended reading: How to calibrate HART pressure transmitters

Flange Mounted Differential Pressure Transmitter Features:

  • Used to measure the differential pressure of corrosive and non-corrosive gases, steam and liquids;
  • Using a stainless steel diaphragm;
  • Applicable to various hazardous places;
  • Output linear DC current proportional to the differential pressure value;
  • Provide various isolation diaphragms to meet special applications, such as liquid level measurement, corrosive media;
  • High measurement accuracy, 0.1%FS, 0.5%FS;
  • Extensible measurement range;
  • Aluminum and stainless steel housing;
  • With intrinsically safe explosion-proof and isolated explosion-proof capabilities. Can be used in various hazardous places.

Extended reading: Smart Differential Pressure Transmitter

Specification of Flange Mounted Differential Pressure Transmitter

ModelTransmitter type
SMT3151LTFlange liquid level transmitter
CodeScale range
40-4.0～40kPa(0-400～4000mmH2O)
50-20～200kPa(0-2～20mH2O)
60-70～700kPa(0-7～70mH2O)
70-210～2100kPa(0-21～mH2O)
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)
251”DN25
401.5”DN40
502”DN50
803”DN80
04”DN100
CodeProcess connection pressure rating
ANSI American Standard (HG20615)DIN European Standard (HG20592)
A150LBPN16/25
B300LBPN40
C600LBPN64
D900LBPN100
CodeHigh pressure side diaphragm
A316 stainless steel
BHastelloy C
CMonel
DTantalum
ETitanium
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:

Applications

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 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.

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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.

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Flange Mounted Differential Pressure Transmitter Working principle

1. Headcover; 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

The Flange Mounted Differential Pressure Transmitter is directly mounted on the reserved flange at the bottom of the pipeline or container. It contacts the liquid through the isolation diaphragm.

When the diaphragm is pressurized, it will produce a slight deformation. The displacement of the diaphragm will move with the change of the differential pressure. This change is accurately converted into a 4-20mA DC two-wire current, voltage or digital HART output signal by the amplifier circuit to achieve pressure measurement and transmission.

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

Single flange. VS. Double flanges 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 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 temperatures, 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, and 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.

More Pressure and Level Measurement Solutions

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

Sino-Inst can offer you with Flange Mounted Differential Pressure Transmitter. Our transmitters can work for you just like EJA210E.

Our Flange Mounted Differential Pressure Transmitters are widely exported to various countries. Including USA, UK, Argentina, Singapore, etc. If you need to purchase Flange Mounted Differential Pressure Transmitter, or have related technical questions, please feel free to contact our sales engineers!

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