Abstract: Apparatus for managing layers of different density includes an enclosed tank for holding the liquids so that they stratify into separate layers of different levels in the tank. A conduit for liquid in the tank is open at an inner end to the tank interior, and is open at an outer end to the tank exterior. A drive moves the inner end of the conduit to different levels within tank so liquid can be transferred into or out of different levels in the tank.

Abstract: A system for managing stratified liquids in a storage tank includes a variable height, in-tank sonar transducer, configured to identify liquid layers of differing densities and to indicate an elevation of the liquid layers, a motorized drive unit for adjusting an orifice to intercept a selected layer, wireless data transmission technology, and software to facilitate remote operation of the system.