The least conductivity for a medium possible to be measured by KROHNE EMF is 1 µS/cm when using IFC 300 converter except for water (20 µS/cm for water).
For less than that, Krohne offers the OPTIFLUX 7300, this electromagnetic flowmeter can be used for very low conductivity (down to 0.05 μS/cm / Demineralised cold water: ≥ 1 μS/cm )
This is due to the usage of non-contacting capacitive signal pick-up instead of conventional electrodes that have direct contact with the process liquid. The OPTIFLUX 7300 electrodes are designed as large-area capacitor plates mounted behind the ceramic liner.