Magnetic Flow Meter Animation

A magnetic flow meter (mag meter, electromagnetic flowmeter) is a transducer that measures fluid flow by the voltage induced across the liquid by its flow through a magnetic field.

A magnetic field is applied to the metering tube, which results in a potential difference proportional to the flow velocity perpendicular to the flux lines. The physical principle at work is electromagnetic induction.

The magnetic flow meter requires a conducting fluid, for example, water that contains ions, and an electrical insulating pipe surface, for example, a rubber-lined steel tube.

Magnetic Flow Meter Animation

The Two Blue dots in the animation indicates electrodes. The Copper coils (red blocks – magnets) on top & bottom of the instrument are electro-magnets used to generate a magnetic field.

When there is no fluid flow then the induced voltage between electrodes is Zero.

When a fluid flows through the magnetic field, the two electrodes pick up the voltage and it is proportional to fluid flow rate.

That’s it. Very Simple.

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