The flowmeter probe consists of an electromagnet and two
electrodes located 180 degrees apart and 90 degrees to the magnetic field inside of a
hollow cylinder. The flowmeter operates according to Faraday’s Law of Induction,
which states that the voltage induced by a conductor moving at right angles through a
magnetic field is directly proportional to the velocity of the conductor through the
field.
The fluid flowing through the recording section of the probe
serves as the conductor, the electromagnet generates the magnetic field, and the
electrodes measure the induced voltage. The electronics attached to the electrodes
transmit a voltage directly proportional to the velocity of the water.
