AB-SUB Flowmeter

Electromagnetic flowmeters contain no moving parts, gears, turbines, or bearings. Instead, they use two electrodes to measure the density of the magnetic field induced by an electrically conductive fluid, such as water, flowing through a pipe. Therefore, they are not susceptible to bearing wear or other mechanical wear problems.
As for the electrodes and lining used in the electromagnetic flowmeter, these components can be made from a variety of materials to make the meter compatible with virtually any electrically conductive fluid, including aggressive acids.
The only limitation of the electromagnetic flowmeter is that the measured fluid must be electrically conductive (> 5 μS/cm). Non-conductive fluids, such as oil and other petroleum-derived fluids, cannot be measured with flowmeter technology.