For over 25 years, M.E.RIN has been supplying Air-Cells to the major transformer manufacturers all over the world, representing the best cost effective solution for oil transformer protection. M.E.RIN designs custom Air-Cells to be used inside cylindrical, elliptical, octagonal or rectangular-shaped conservator tanks. The Merin Air-Cell floats in oil inside the conservator and expands/contracts by breathing through a flange placed in a customer-specified location, thus allowing the Merin Air-Cell to compensate for oil displacement due to temperature variations in the transformer.