Electromagnetic Flow Meter Advantages And Disadvantages
Magnetic flow meter 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.
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.
Disadvantages
(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 flow meter produced by Shanghai Cixi Instrument Co., Ltd. has a variety of calibers and models, and can be customized. If you need detailed parameters and prices, please contact winny:sales01@cxflowmeter.com
