Jinhu Dongxiang Instrument Co., Ltd. specializes in the production and sale of electromagnetic flowmeters . Our customers have witnessed our sales strength. We briefly talk about the measurement and selection of electromagnetic flowmeters :
The electromagnetic flowmeter is based on the principle of Faraday's electromagnetic induction. It is an instrument for measuring the volumetric flow of conductive liquids. According to Faraday's law of electromagnetic induction, when a conductor moves in a magnetic field to cut the magnetic field lines, an induced voltage is generated in the conductor. The magnitude of the electromotive force and the conductor In the magnetic field, the speed of motion perpendicular to the magnetic field is proportional to the flow rate.
The measurement accuracy of the electromagnetic flowmeter is based on the fact that the liquid is filled in the pipeline. The problem of measuring air in the pipeline has not been well solved.
Electromagnetic flowmeter and selection principle: 1), the liquid to be measured must be a conductive liquid or slurry; 2) the caliber and range, preferably the normal range exceeds half of the full range, and the flow rate is between 2-4 meters; 3 ), The use pressure must be less than the pressure resistance of the flowmeter; 4), different temperatures and corrosive media choose different lining materials and electrode materials.
The advantages of the electromagnetic flowmeter : no throttle parts, so the pressure loss is small, and the energy consumption is reduced. It is only related to the average speed of the measured fluid, and the measurement range is wide; only the water calibration can be used to measure other media without correction. Suitable for use as a settlement measurement device. Due to the continuous improvement of technology and process materials, the continuous improvement of stability, linearity, accuracy and life and the continuous expansion of pipe diameter, the measurement of solid-liquid two-phase media uses replaceable electrodes and scraper electrodes to solve the problem. The measurement problems of high pressure (32MPA), corrosion-resistant (anti-acid, alkali lining) media, and the continuous expansion of the caliber (up to 3200MM caliber), the continuous increase of life (generally greater than 10 years), electromagnetic flowmeters are getting more and more Widely used, its cost has also been reduced, but the overall price, especially for large diameter pipes, is still high, so it has an important position in the purchase of flow meters.