LFE is a digital flow sensor for water and non-corrosive conductive liquids.  While the PF3W sensors detect flow using the Karman vortex principle, LFE applies Faraday's law of induction.  There are no obstacles or moving parts in the flow path, leading to a smaller pressure loss which saves pumping energy.  Detectable liquids have fewer viscosity restraints.  Finally, the flow direction can