Can the electromagnetic flowmeter measure distilled water or pure water?

To understand the principle of electromagnetic flowmeter, the electromagnetic flowmeter is not able to measure the flow of water such as distilled water. The principle of electromagnetic flowmeter is Faraday's law of electromagnetic induction, which is that the conductor creates emotional electromotive force at both ends of the magnetic field. The electromagnetic flowmeter principle for the electrical conductivity of liquid flow in perpendicular to the magnetic field of magnetic measurement, a direction perpendicular to the direction of flow and flow rate is proportional to the induced potential, the direction of the principle of electromagnetic flowmeter in the electromotive force according to the "Ming right hand rule",

Its value is as follows:

E in kBDV - induction electromotive force, that is, flow signal, V; K - factor; B -- subinduction intensity, T; D -- measuring tube inner diameter, m; V -- average velocity, m/s. The volume flow of the liquid is qv(M3/s),qv= PI D2V/4), and E= (4kB/ PI D) qv= KQV, K= meter constant, K=4kB/ PI D. The principle of electromagnetic flowmeter is that the conductive liquid is regarded as a conductor, and the flow of fluid is regarded as a conductor to cut the magnetic force line. In fact, the electromagnetic induction method is used to measure the flow velocity of conducting liquid, and its internal situation is much more complicated than that of solid conductor cutting magnetic field in magnetic field. As the particle of space, the vector field of magnetic induction intensity is in a limited uniform range, and the flow of conductive liquid can only be the particle movement in the continuous medium. The motion velocity of continuous medium in the flow path is also a vector form, and the velocity distribution in the pipeline is a complicated problem. These complex questions can only be answered with certain preconditions. Therefore, the principle of electromagnetic flowmeter is used to explain the measurement of electromagnetic flowmeter. Therefore, the scholars behind Faraday ascribe the theory of electromagnetic flowmeter to the field of magnetic fluid mechanics. It is a combination of fluid mechanics and electromagnetism. In the practical application of industry. The electromagnetic flowmeter is used to measure the electrolyte liquid. In the low working magnetic field frequency, the metal measuring electrode inevitably produces polarizable voltage, such as the sharp interference of the slurry measurement. Low conductivity measurement of flow noise. Therefore, the theory of electrochemistry is also involved. Discuss the principle of electromagnetic flowmeter, often without a lot of electromagnetics and fluid mechanics formula deduction and citation, the contents of the principle of electromagnetic flowmeter is quite boring, to many practical applications of readers, also do not need. In order to facilitate the readers to understand the principle of electromagnetic flowmeter, we just give it some of the major theoretical issues to clarify, illustrate the physical significance of the principle of electromagnetic flowmeter, try to avoid tedious formula derivation and demonstration. However, it is necessary to study and study the theory of electromagnetic flowmeter principle if we have a deep understanding of electromagnetic flowmeter.