The main features and shortcomings of electromagnetic flow meters

Abstract: The main features and insufficient information of electromagnetic flowmeters are provided by excellent flowmeter and flowmeter manufacturers and quotation manufacturers. Abstract: Electromagnetic flowmeter is a new type of flow measuring instrument developed rapidly with the development of electronic technology in the 1960s. It is made according to Faraday's law of electromagnetic induction and is used to measure the volumetric flow of conductive fluids. Due to its unique advantages, it has been widely used. More flowmeter manufacturers choose models and price quotations. You are welcome to inquire. The following are the main features and shortcomings of electromagnetic flowmeters. Electromagnetic flowmeter is a new type of flow measuring instrument developed rapidly with the development of electronic technology in the 1960s. It is made according to Faraday's law of electromagnetic induction and is used to measure the volumetric flow of conductive fluids. Due to its unique advantages, it has been widely used in the measurement of various conductive liquids in industry. For example, measuring various acids, alkalis, salts and other corrosive liquids; various flammable and explosive media; various industrial sewage, pulp, mud, etc. The main features of the electromagnetic flowmeter are: ①The transmitter of the electromagnetic flowmeter has a simple structure, no moving parts, and no throttling parts that hinder the flow of the fluid, so when the fluid passes through, it will not cause any additional pressure loss, and at the same time It does not cause problems such as wear and blockage, and is especially suitable for measuring ore pulp with solid particles, liquid-solid two-phase fluids such as sewage, and various viscous slurries. Also, because it has no moving parts in its structure, it can be made of electrodes by attaching a corrosion-resistant insulating lining and selecting corrosion-resistant materials, which has good corrosion resistance and can be used for the measurement of various corrosive media. ②The electromagnetic flowmeter is—A volume flow measuring instrument, in the measurement process, it is not affected by the temperature of the measured medium. Influence of viscosity, density and conductivity (within a certain range). Therefore, the electromagnetic flowmeter can be used to measure the flow of other conductive liquids only after being calibrated by water, without any additional corrections. ③The range of the electromagnetic flowmeter is extremely wide, and the range ratio of the same electromagnetic flowmeter can reach 1:100. In addition, 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 flow or turbulent flow) under the axisymmetric distribution. ④The electromagnetic flowmeter has no mechanical inertia and has a sensitive response. It can measure instantaneous pulsating flow and has good linearity. Therefore, the measurement signal can be directly converted into a standard signal output linearly with a converter, which can be indicated locally or transmitted over a long distance. Although the electromagnetic flowmeter has the above-mentioned excellent characteristics, it still has some shortcomings, so that it is limited in use. The main points are as follows: ① Electromagnetic flowmeter cannot be used to measure gas, vapor and liquid containing a large amount of gas. ②Electromagnetic flowmeter cannot be used to measure liquid medium with very low conductivity at present. The conductivity of the measured liquid medium cannot be lower than 10-5 (S/cm), which is equivalent to the conductivity of distilled water. It is still powerless to petroleum products or organic solvents. ③ Due to the limitation of the temperature of the insulating lining material of the measuring tube, the current industrial electromagnetic flowmeter cannot measure high temperature and high pressure fluids. ④The electromagnetic flowmeter is affected by the flow velocity distribution. Under the condition of axisymmetric distribution, the flow signal is proportional to the average flow velocity. Therefore, there must be a certain length of straight pipe sections before and after the electromagnetic flowmeter. ⑤ Electromagnetic flowmeters are susceptible to external electromagnetic interference. The above is the whole content of this article. You are welcome to inquire about the flowmeter selection and quotation of our factory. 'The main features and shortcomings of electromagnetic flowmeters'

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