Electromagnetic flow meters measure the flow rate of the conductivity liquid
on the base of Faraday Law. Therefore, the fluid in pipe must have the conductivity
and the conductivity of the fluid is enough if it is minimum 5μS/cm.

Electromagnetic flow meters are possible to measure waste water, sewage and muddy
water and also possible to measure very acid and alkalinity fluids with the use of
proper lining material . With these merits, electromagnetic flow meters are widely used
in several fields specially, paper, petrochemical, food industry and so on.