Magflow magnetic flow meters are based on Faraday’s Law of Electromagnetic Induction. According to this principle, when a conductive medium passes through a magnetic field, a voltage is generated which is proportional to the velocity 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.
The Magmeter’s obstructionless design with nothing projecting into the flow stream results in a low pressure drop across the meter and reduces the potential for abrasion. Furthermore, the only wetted parts in a magnetic flow meter are the liners and electrodes, which can be made from materials that will withstand corrosion or do not contaminate the liquid. Therefore, magnetic flow meters can be used in sanitary applications for flows consisting of corrosive liquids or abrasive slurries.
Magflow magnetic flow meters are available as in-line units and also as insertion flow meters for larger pipe sizes.
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