Electromagnetic flowmeter#39; measurement principle is Faraday#39;s law of electromagnetic induction. The main components of the sensor are: measuring tube, electrode, excitation coil, iron core and yoke housing.It is mainly used to measure the volumetric flow in conductive liquids and slurries in closed pipes.

Electromagnetic flowmeter

Electromagnetic Flow Meters, simply known as mag flow meter is a volumetric flow meter which is ideally used for waste water applications and other applications that experience low pressure drop and with appropriate liquid conductivity required.

The device doesnrsquo;t have any moving parts and cannot work with hydrocarbons and distilled water. Mag flow meters are also easy to maintain.

Principle of Magnetic Flow Meter Based on Faradayrsquo;s Law

Magnetic flowmeters works based on Faradayrsquo;s Law of Electromagnetic Induction. According to this principle, when a conductive medium passes through a magnetic field B, a voltage E is generated which is proportional to the velocity v of the medium, the density of the magnetic field and the length of the conductor.

In a magnetic flow meter, a current is applied to wire coils mounted within or outside the meter body to generate a magnetic field. The liquid flowing through the pipe acts as the conductor and this induces a voltage which is proportional to the average flow velocity.

This voltage is detected by sensing electrodes mounted in the Magflow meter body and sent to a transmitter which calculates the volumetric flow rate based on the pipe dimensions.

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