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Flow Meter

Flow measurement: Mag meter-advantages and limitations

Magnetic Flowmeter is a type of flow measuring instrument that developed rapidly with the development of electronic technology in the 1950s and 1960s. Electromagnetic flowmeter is an instrument that applies the principle of electromagnetic induction to measure the flow of a conductive fluid based on the electromotive force induced by the conductive fluid through an applied magnetic field. We use a lot mag meter to measure chemical, milk, slurry, acid and so on.

China Magnetic flowmeter

The advantages of electromagnetic flowmeters

1. The sensor structure of the electromagnetic flowmeter is relatively simple, and it is a kind of flowmeters with the low power consumption.There are no moving parts in the flow sensor measuring tube and no additional pressure loss is caused when the medium passes through the flow meter sensor tube.
2. It can measure the flow rate of corrosive medium, sloping medium and suspended liquid-solid two-phase flow. This is due to the fact that there is no obstructive flow component inside the metering tube. Only the measuring tube lining and the electrode are in contact with the fluid to be measured, and the liner and electrodes material can be selected according to the nature of the fluid to be tested;
3. Electromagnetic flowmeter is a volume flow measuring instrument. During the measurement process, it is not affected by the temperature, viscosity and density of the measured medium with a certain range of conductivity. The electromagnetic flowmeter can be used to measure the flow rate of other conductive liquids only after being calibrated by water;
4. The output of the electromagnetic flowmeter is only proportional to the average flow velocity of the measured medium, independent of the laminar or turbulent state under symmetric distribution. The range of the electromagnetic flowmeter can be as wide as 100:1.
5. It can measure flow in both forward and reverse directions.

Disadvantages of electromagnetic flowmeter

1. Cannot be used to measure gases, vapors, and liquids containing large amounts of gas;
2. Cannot be used to measure liquid media with low conductivity, electromagnetic flowmeter can not measure media such as petroleum products or organic solvents;
3. Cannot be used to measure high temperature media.The max high temperature we can measure is 200 ℃
4. Electromagnetic flowmeters are sensitive to external electromagnetic interference.

welcome to contact Silver Automation Instruments to get price cost of magnetic flow meters.


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