ACTA AS The reference in rolling mill roll eddy current testing The ACTA AS, only fully digital equipment in its category, is the most advanced and most reliable testing equipment on the market, stemming from ACTA 40+ years experience in the industrial non destructive testing field. ACTA AS-US (combined eddy current and ultrasonics) The reference in rolling mill roll eddy current and ultrasonics testing With the addition of ultrasonics, ACTA offer a full testing solution, all at once testing surface, sub-surface and deeper (core shell bound). More information on ACTA CND website