Magnetic Flow Meter Transmitter

Magnetic Flow Meter Transmitter

Magnetic Flow Meter Transmitter

1. Pipe diameter: DN6-DN2800
2. Type: split type, integrated type, plug-in type (applicable to pipe diameter above DN100)
3. Lining material: neoprene, PTFE, PFA, FEP, F46
4. Electrode material: SS316L, HC, HB, Ti, Tan, Pt

1. Working principle:

Electromagnetic flow meter transmitter is a flowmeter that uses the principle of electromagnetic induction to accurately measure and monitor the flow of conductive liquid in pipelines. It consists of a sensor consisting of two electromagnets that generate a magnetic field perpendicular to the direction of flow, and a conducting fluid passed through it.


When the fluid flows through the magnetic field, it cuts the magnetic field lines and generates a voltage proportional to the fluid flow rate. The sensor then converts this voltage into a signal that is sent to the converter.


A transmitter connected to the sensor amplifies the signal and converts it into a linear output proportional to the flow rate.
This type of flow meter is highly accurate and reliable, and is suitable for a variety of liquids including acids, alkalis and slurries, sewage, and wastewater. It is also unaffected by changes in fluid density, viscosity and temperature.


Overall, this flowmeter is the instrument of choice for all industries that require accurate liquid flow measurement and monitoring. It plays a very important role in ensuring effective process control, preventing leaks and reducing waste.


Magnetic flow meters are ideal for measuring the flow of conductive liquids such as: water, beverages, beer, milk, acids, alkalis, sewage wastewater, pulp slurries and electrolytes. The meter is more accurate than other flow meters and produces a signal independent of pressure, density, viscosity and temperature. The unit is also easy to install, operate and maintain, providing years of reliable, accurate flow readings.


working principle of electromagnetic flow meter

Working principle of electromagnetic flow sensor


2.Main technology performance:

*Nominal diameter(mm)


* Accuracy


*Measuring range(velocity)
0.01 m/s至15m/s


*Conductivity of measured medium
More than 20μs/cm


*Nominal pressure(Mpa)
Nominal pressure of sensors
(This is standard pressure, can be extended, please contact our sales representative)

Nominal diameter(mm)





Nominal pressure(MPa)






3. The lining selection table is as follows:



Main performance



Good elasticity and wear resistance; but not resistant to corrosive liquids such as acids and alkalis



The chemical properties of polytetrafluoroethylene (PTFE) are the most stable among all plastics, and it is resistant to boiling hydrochloric acid, sulfuric acid, aqua regia, concentrated alkali and various organic solutions; Food grade: When measuring food liquids, PTFE lining is the first choice;


The chemical properties are similar to PTFE, with good negative pressure resistance and food grade; the cost of use is higher than PTFE;


4. The electrode selection table is as follows:


Electrodes material

Main performance and application


Used for industrial water, domestic water, sewage, waste water, pulp, mud, etc., not corrosion resistant; suitable for petroleum, chemical, metallurgy and other industries as well as municipal and environmental protection fields; farmland irrigation water,



With good corrosion resistance performance to all concentrations of hydrochloric acid below the boiling point; also resist sulfuric acid, phosphoric acid, hydrofluoric acid, organic acid and other non-oxidizing acid, alkali and hydrochloric acid etc.



It has strong acid corrosion resistance and resistance to non-oxidizing acids, such as mixtures of nitric acid, chromic acid and sulfuric acid; antioxidant salts, such as hypochlorite solution, seawater and other oxidants.


Resistant to seawater, various chlorides, hypochlorites, oxidizing acids (including nitrosonic acid), organic acids, alkali, etc.;


Good corrosion resistant property, similar with glass; it could almost resist all chemical mediums(including boiling hydrochloric acid, nitric acid and sulfuric acid below 175C), but not hydrofluoric acid, strong sulfuric acid and alkali.

Stainless steel coated with tungsten carbide

It has strong wear resistance and is usually used in liquids containing sediment or even small solid particles, but it is not resistant to corrosion.


5. Sensor internal structure:


The sensor of the magnetic flow meter transmitter is mainly composed of a measuring tube, an excitation system, an electrode, a housing and a junction box.


Measuring tube: The measuring tube is located in the center of the sensor and the fluid flows through it. It is welded by acid-resistant stainless steel pipes and flanges, with an insulating lining inside.


Excitation system: Mainly composed of excitation coil and magnetic yoke, which generates working magnetic field.

mag flowmeter structure diagram:

Electrode: A flow signal will be generated after the electrode comes into contact with the medium to be measured, so it is important to select a suitable electrode material. The selection of the electrode is determined based on the performance of the medium to be measured.


Shell: plays the role of support, protection and sealing. Terminal box: Located on top of the sensor, the internal terminal block connects the sensor to the converter. Protection levels can be divided into: IP65, IP67, IP68


6.Internal coil:

Henan Junyuan Automation Equipment Co., Ltd. uses all copper wires inside the meter body, so that the meter works more stably, and can ensure high accuracy and long service life even after long-term use. The coil is as shown below:


Electromagnetic flowmeter internal coil

Small diameter electromagnetic flowmeter internal coil


7.Our products:


⑴According to material: carbon steel, SS304, SS316

⑵Connection methods: clamp, thread, flange

⑶According to type: integrated type, split type, plug-in type

Integrated PTFE-lined Mag Flowmeter


Integrated Mag Flowmeter

Split Mag Flowmeter

Integrated insertion electromagnetic flowmeter

Stainless Steel Mag Flowmeter

SS304 stainless steel electromagnetic flowmeter


8.On-site installation diagram:


Electromagnetic flowmeter works


9.Flowmeter Calibration:


All our flow meters undergo 5-point calibration before leaving the factory to ensure an accuracy of 0.5%, which can reach a maximum of 0.2%, and a 100% factory qualification rate.



10. Frequently Asked Questions:


1.Q: Can we be an agent for your flow meter products?


A: Of course, but we need to know which country are you from? What city, if we have no agent in your country or city, you can become our agent.


2.Q: Are your products highly accurate? Is the accuracy 0.2%?


A: Yes. The accuracy of our products can reach up to 0.2%, and the normal accuracy is 0.5%. If the accuracy is 0.2%, then the pipe diameter must be below DN300,


3.Q: Can I get samples? What is your MOQ in PCS?


A: Yes, Our MOQ is 1 PCS.


4.Q: What payment methods do you support?


A: We support: TT payment, credit card online payment, Western Union payment, cross-border RMB payment, LC payment.


5. Q: How long is your delivery time?


A: Our estimated production time for 50PCS is 4 working days. If there are more, please contact our sales agent and she will give you the specific production time. We have cooperated with international freight forwarders for many years. Determine the shipping method and shipping time based on your purchase quantity.

Register an Interest

Provide Your Information