Advantages and disadvantages of electromagnetic flowmeter

 

Electromagnetic flowmeter is an induction meter that measures the volume flow of conductive medium in the tube according to Faraday's law
of electromagnetic induction. In terms of structure, the electromagnetic flowmeter is composed of two parts, the sensor directly contacting the
pipeline medium and the upper signal converter. It has been widely used in industrial technology and management departments such as
chemical industry, environmental protection, metallurgy, medicine, papermaking, water supply and drainage.

 

Today, Shanghai Cixi Instrument Co. Ltd will give you a detailed answer to the advantages and disadvantages of electromagnetic flow meter.

sales01@cxflowmeter.com

 

advantage

 

(1) The output of the electromagnetic flowmeter is only proportional to the average flow velocity of the measured medium, and has nothing to do
with the flow state (laminar or turbulent) under a symmetrical distribution. Therefore, the electromagnetic flowmeter has a very wide range, with
a range ratio of up to 20:1, and some even up to 100:1.

 

(2) The diameter range of industrial electromagnetic flowmeters is extremely wide, ranging from several millimeters to several meters, and there
are real-flow calibration equipment with a diameter of 3m in China, which lays the foundation for the application and development of electromagnetic flowmeters.

 

(3) The sensor structure of the electromagnetic flowmeter is simple, and there are no moving parts in the measuring tube, nor any throttling parts
that hinder the flow of fluid. Therefore, when the fluid passes through the flow meter, it will not cause any additional pressure loss. It is one of the flow meters with low energy consumption in the flow meter.

 

(4) The electromagnetic flowmeter has no mechanical inertia and is sensitive. It can measure the instantaneous pulsating flow rate and the flow rate
in both positive and negative directions.

 

(5) It can measure the flow of dirty medium, corrosive medium and suspended liquid-solid two-phase flow. This is because there are no parts obstructing
the flow inside the measuring tube of the instrument, and only the inner lining and electrode of the measuring tube are in contact with the measured fluid.
The material can be selected according to the nature of the measured fluid. For example, using polytrifluoroethylene or polytetrafluoroethylene as the
inner lining can measure various corrosive media such as acids, alkalis, and salts; using wear-resistant rubber as the inner lining is particularly suitable for
measuring wear and tear with solid particles Larger liquid-solid two-phase flow such as mineral pulp and cement slurry and various suspended liquids such
as fibrous liquid and pulp.

 

(6) The electromagnetic flowmeter is a volume flow measuring instrument. During the measurement, it is not affected by the temperature, viscosity, density
and conductivity (in a certain range) of the measured medium. Therefore, the electromagnetic flowmeter can be used to measure the flow of other conductive
liquids only after being calibrated by water.

 

shortcoming

 

(1) Cannot be used to measure gas, steam and liquids containing a large amount of gas.

(2) Cannot be used to measure liquid media with very low conductivity. For example, for petroleum products or organic solvents and other media,
the current electromagnetic flowmeter is still powerless.


The electromagnetic flowmeter produced by CIXI has a variety of calibers and models, and can be customized. If you need detailed parameters and prices,
please consult winny:sales01@cxflowmeter.com