The PHASE II+ PTG-3500 paint coating thickness gauge can perform two different methods of calculation by utilizing the characteristics of both eddy current and magnetic induction. The PTG-3500 offers an integrated probe that can automatically detect a Ferrous or Non-Ferrous substrate, and comes with 2 substrate samples (steel,aluminum), 4 calibrated thickness samples, carry case, batteries and operation manual. This gauge easily detects the thickness of nonmagnetic coating on a magnetic substrate (ferrous), or an insulating coating on a non-magnetic conductive substrate (non-ferrous). The PHASE II+ PTG-3500 can be used in many areas of industry including manufacturing, general engineering, and commercial inspection. Testing performance is both non-destructive and extremely accurate.