The plug-in electromagnetic flowmeter is composed of sensor and converter. It is used to measure conductive liquid. The conductivity should be greater than 5u s/cm. It can be used to measure water, sewage, acid, alkali and other substances. It is mainly used to measure the instantaneous and volumetric flow of conductive liquids in large and medium-sized pipes in tap water, petrochemical industry, etc. It is especially suitable for flow measurement in metallurgical, paper-making and sewage treatment industries.