The electro-magnetic flow meter model MAG-C has been engineered so to measure the flow and the volume of any liquid that is electrically conductor. Those flow meters do not have any mechanical moving component, and therefore the liquid do not have any obstacle in its flowing, thus avoiding any damage caused by solids that can be in the liquid. The internal part of the measuring pipe is electrically insulated and therefore the liquid to be measured does not have any possibility to be in contact with the material by which the pipe and the flanges are made. That allows the possibility of measuring any type of liquid compatible with the internal cladding. The MAG-C meters enjoys a very low head of loss and the possibility of mounting in every position, and therefore are suitable for every sector of the chemical, paper, food industries and water works.