Electromagnetic flowmeter​ is a kind of variable area flowmeter. The working principle of electromagnetic flowmeter is that in a vertical cone tube that expands from bottom to top, the gravity of the circular cross-section float is borne by hydrodynamic force, and the float can move in the cone.

The 8700M Magnetic flowmeter​ platform consists of a sensor and a transmitter. The sensor is installed in-line with the process piping; the transmitter can be integrally mounted or remotely mounted to the sensor.