Eliminating short ending effects in the primary transducer of electromagnetic flow meters

This paper describes a new method of primary transducer length optimization for electromagnetic flow meters. The method is based on eliminating a short ending effect that appears in the area where the magnetic field rapidly vanishes. The method uses numerical tools compatible with the cross section of the excitation coil design. It is based on a simple two-dimensional mathematical model of the primary transducer. The paper presents results of calculations for two water-to-ground conductivity ratios and for a rectangular flow channel.