It is manufactured according to the law of electromagnetic induction to measure the volume flow of conductive liquid in the pipeline, such as water, sewage, mud, pulp, acid, alkali, salt liquid and food slurry, etc. It is widely used in petrochemical, mining and metallurgy, coal, water conservancy engineering water supply and drainage, sewage treatment and other industries. Working Principle: The basic theory on which the electromagnetic flowmeter is based is Faraday's law of electromagnetic induction. When the conductor cuts the motion of the magnetic field line, the induced electromotive force will be generated in the conductor. According to this principle, the volume of conductive fluid flowing through the tube can be measured. The direction of the conductive fluid flow is perpendicular to the direction of the electromagnetic field, and an alternating magnetic field is applied in the vertical direction of the catheter, and a pair of electrodes are installed on both sides of the inner wall of the insulated lining of the catheter, and the connection of the two electrodes is perpendicular to the axis of the catheter. As the conducting liquid passes through the tube, an induced electromotive force is generated at both electrodes because of the cutting of magnetic field lines. The electromotive force is proportional to the flow, thus deriving the flow.