The basic principle of electromagnetic flow meter is Faraday's law of electromagnetic induction, that is, the magnetic field in the magnetic field in the cutting movement, the two ends of the induced electromotive force E is:
E-KBvD
In the formula, K is the instrument constant; B is the magnetic induction intensity (T); v is the conductor moving average velocity m / sD is the pipeline inner diameter (iv).
Electromagnetic interference meter works and structure shown in Figure 1, by the flow sensor and converter two parts
When measuring the flow rate, the conductive liquid corresponds to the conductive metal rod in the Faraday test and flows through the magnetic field perpendicular to the flow direction at the average speed v. The flow of a conductive liquid induces a voltage proportional to the average flow rate at the measuring electrode. The induced voltage signal E is detected by a pair or a pair of electrodes in direct contact with the liquid.
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