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Advantages and disadvantages of electromagnetic flowmeters

2019-05-05 View Original

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Advantages of electromagnetic flowmeters: 1) The sensor of electromagnetic flowmeters (http://www.yb1518.com/ProductShow_133.html) has a simple structure; there are no moving parts inside the measurement tube, nor any throttling elements that could impede fluid flow. Therefore, when fluid passes through the flow meter, it does not cause any additional pressure loss, making it one of the flow meters with the lowest operating energy consumption. 2) It can measure the flow rate of contaminated media, corrosive media, and suspended liquid-solid two-phase flows. This is because there are no components that impede flow inside the measuring tube of the instrument; only the lining of the measuring tube and the electrodes come into contact with the fluid being measured, and their materials can be selected based on the properties of that fluid. For example, using polytrifluoroethylene or polytetrafluoroethylene as a lining allows for the measurement of various corrosive substances such as acids, bases, and salts ; With a wear-resistant rubber lining, it is particularly suitable for measuring slurry and cement slurry alike, which are two-phase flow systems containing solid particles and subject to significant wear, as well as various suspended liquids such as those containing fibers and pulp. 3) The electromagnetic flowmeter (http://www.yb1518.com/ProductShow_133.html) is a type of instrument for measuring volumetric flow rate. During measurement, it is not affected by the temperature, viscosity, density, or conductivity of the fluid being measured (within certain limits). Therefore, after being calibrated with water, an electromagnetic flowmeter can be used to measure the flow rate of other conductive liquids. 4) The output of the electromagnetic flowmeter is proportional only to the average flow velocity of the medium being measured, and is independent of the flow regime under symmetric conditions (laminar or turbulent). Therefore, electromagnetic flowmeters have an extremely wide measurement range; their ratio can reach 100:1, and in some cases even 1000:1 for the operational flow range. 5) Electromagnetic flowmeters have no mechanical inertia and are highly responsive; they can measure instantaneous pulsating flow rates, as well as flow in both forward and reverse directions. 6) Industrial electromagnetic flowmeters come in a very wide range of diameters, from a few millimeters to several meters. In China, there are already flow calibration devices with a diameter of 3 meters, which lays the foundation for the application and development of electromagnetic flowmeters. Disadvantages of electromagnetic flowmeters: 1) They cannot be used to measure gases, steam, or liquids containing a large amount of gas. 2) It cannot be used to measure liquid media with very low conductivity, such as petroleum products or organic solvents; currently, electromagnetic flowmeters are not capable of handling such media. 3) Ordinary industrial electromagnetic flowmeters (http://www.yb1518.com/ProductShow_133.html) cannot be used to measure high-temperature media due to the limitations of the lining materials in the measurement tube and the electrical insulation materials ; Without special treatment, it cannot either be used for measuring low-temperature media, in order to prevent dew formation (frosting) outside the measurement tube from damaging the insulation. 4) Electromagnetic flowmeters are susceptible to external electromagnetic interference. For more information, please visit the company’s official website at http://www.yb1518.com/. Please keep this link when reproducing the content! http://www.yb1518.com/UploadFiles/2012717174126829.jpg

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