An electromagnetic flow meter uses Faraday's Law of electromagnetic induction to measure the volumetric flow rate of conductive liquids through a pipe without moving parts. It works by generating a magnetic field inside the pipe and measuring the voltage generated across electrodes on the pipe walls by the liquid flowing perpendicular through the magnetic field. The voltage is proportional to flow rate, magnetic field strength, and pipe diameter. Electromagnetic flow meters are ideal for wastewater and other dirty or corrosive liquids in pipelines and refineries due to their low maintenance needs and ability to measure both forward and reverse flow accurately.
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