Can an electromagnetic flow meter measure salt water?

Project Overview

　　First, the basic working principle of electromagnetic flowmeter

　　Electromagnetic flowmeter is a kind of instrument to measure the liquid flow by measuring electromagnetic induction. When the conductor of conductivity greater than a certain critical value (such as water) through the electromagnetic field, will cause the corresponding induction potential in the fluid, so you can measure the size of the electromagnetic induction signal to determine the flow of the fluid, which is the basic measurement principle of electromagnetic flow meter.

　　Second, the application of electromagnetic flowmeter

　　Because the electromagnetic flowmeter has high precision, good stability, not easily affected by the fluid properties and other advantages, so in the industrial automation control system has been widely used. Electromagnetic flowmeter is suitable for flow of liquids, liquid-solid two-phase fluid measurement, such as water, circulating water, sewage and so on.

　　Third, the electromagnetic flowmeter measurement of demineralized water

　　Demineralized water is the removal of salt in the water after the water, its salt content and types are different. As the measurement principle of electromagnetic flowmeter is based on the role of electrical conductivity, so in the measurement of demineralized water needs to be based on the type and concentration of salt to select the appropriate electrode material and instrument parameters to ensure the accuracy and precision of the measurement results.

　　Usually, 316L stainless steel material is used as the electrode material, which can be used to measure a certain concentration of salt water, but when measuring seawater with high salinity and solutions with strong colloidal properties, it is necessary to choose special electrode materials, such as tungsten, molybdenum, etc. At the same time, the setting of the instrument parameters also requires special attention to overcome the problems of signal attenuation and noise caused by high salinity.

　　Fourth, the conclusion

　　In conclusion, the electromagnetic flowmeter can measure demineralized water, but it is necessary to select the appropriate electrode materials and instrument parameters according to the type and concentration of salt before measurement to ensure the accuracy and precision of the measurement results. In addition, in the process of practical application, it is also necessary to optimize and calibrate the electromagnetic flowmeter according to different working environments and conditions, respectively, considering other factors, such as temperature, pressure, flow rate and other factors, in order to ensure its long-term stable performance.