According to Faraday's law of electromagnetic induction, when a conductor passes perpendicularly through a magnetic field B, a voltage will be induced. In the measurement of this flowmeter, the moving conductor is a flowing conductive medium. The magnetic field B is emitted in a direction perpendicular to the flowing medium. The induced electromotive force U at the E1 and E2 electrodes is directly proportional to the flow velocity V of the medium.
U=K×B×V×D
K- Flowmeter constant
D- Internal probe spacing
The induced electromotive force U is further processed and then converted into a standard electrical signal for output or display