How to Use Magnetic Flow Meters
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How to Use Magnetic Flow Meters Magnetic flow meters measure the velocity of conductive liquids in pipes, such as water, acids, caustic, and slurries. Magnetic flow meters can measure properly when the electrical conductivity of the liquid is greater than approximately 5S/cm. Be careful because using magnetic flow meters on fluids with low conductivity, such as de-ionized water, boiler feed water, or hydrocarbons, can cause the flow meter to turn off and measure zero flow. This flow meter does not obstruct flow, so it can be applied to clean, sanitary, dirty, corrosive and abrasive liquids. Magnetic flow meters can be applied to the flow of liquids that are conductive, so hydrocarbons and gases cannot be measured with this technology due to their non-conductive nature and gaseous state respectively. Magnetic flow meters do not require much upstream and downstream straight run so they can be installed in relatively short meter runs. Magnetic flow meters typically require 3-5 diameters of upstream straight run and 0-3 diameters of downstream straight run measured from the plane of the magnetic flow meter electrodes. |