电磁流量传感器是基于法拉第电磁感应定律而制成的，只是其中切割磁力线的导体不是一般的金属，而是具有一定电导率的液态流体或液固两厢流体。被测量的导电介质在磁场中作切割磁力线运动时，导电介质中会产生感应电动势，感应电动势由一对电极检测-Electromagnetic flow sensor is based on Faraday' s law of electromagnetic induction and made of only one conductor cutting magnetic field lines is not an ordinary metal, but has a certain electrical conductivity of the liquid fluid or liquid-solid hatchback fluid. Conductive medium being measured in the magnetic field movement for cutting magnetic field lines, conductive medium will be induced electromotive force, EMF detection by a pair of electrodes