The measuring principle of the electromagnetic flow meter is based on the electromagnetic induction law of Faraday. The sensor is mainly composed of a measuring tube with an isolated lining, a
pair of electrodes installed by penetration of the measuring tube wall, a pair of coils, and an iron core to produce a working magnetic field. When the conductive fluid flows through the measuring tube of the sensor, the voltage signal in direct proportion to the average flow velocity of the fluid will be inducted on the electrodes. The signal is amplified and treated by the transmitter to realize various display functions.
The converters supply a stable exciting current to the coil in the sensor of electromagnetic flow meters to get the B constant and amplify the electromotive force and convert it into standard signals of current or frequency so that the signals can be used for displaying, controlling, and processing
