Magnetic flow meter working principle
The electromagnetic flow meter is a flow meter based on Faraday’s law of electromagnetic induction. The advantages of electromagnetic flow meter is a very small pressure drop, measurable flow range. The maximum flow rate and the minimum flow ratio is generally 20: 1 or more, the applicable industrial diameter range is wide, up to 3m, the output signal and the measured flow into a linear, high accuracy, measurable conductivity≥5μs / cm Acid, alkali, salt solution, water, sewage, corrosive liquids and mud, pulp, pulp and other fluid flow. But it can’t measure the flow of gas, steam and pure water.
When the conductor in the magnetic field for cutting the magnetic field line movement, in the conductor will produce the induced potential, the size of the induced potential and the conductor in the magnetic field in the effective length and the conductor in the magnetic field in the direction perpendicular to the magnetic field movement is proportional to the speed. Similarly, when the conductive fluid flows in the vertical direction in the magnetic field and cuts the magnetic fluxes, the induced potentials are generated at the electrodes on both sides of the pipe.