Magnetic or Electromagnetic flow meters are comprised of a transmitter and sensor that together measure flow. The magnetic flow meter’s sensor is placed inline and measures an induced voltage generated by the fluid as it flows through a pipe. The transmitter takes the voltage generated by the sensor, converts the voltage into a flow measurement and transmits that flow measurement to a control system.
Magnetic flow meters use Faraday’s Law of Electromagnetic Induction to determine the flow of liquid in a pipe. In a magnetic flow meter, a magnetic field is generated and channeled into the liquid flowing through the pipe.
A magnetic or electromagnetic flowmeter can be installed in a comparatively simple fashion insofar as an existing pipe network can be converted into a measurement system by applying external electrodes and magnets. These flow meters can track forward and reverse flow and are minimally affected by flow disturbances related to viscosity or density.