TG-100D coulometric thickness gauge, using anode dissolution coulomb method, conforms to ISO2177 standard. It can measure chromium, nickel, copper, zinc, tin, silver, gold, cadmium and other metal coatings, nickel alloy coatings, composite coatings (such as Cr/Ni/Cu) and multilayer nickel coatings. Welcome to visit our official website : http://www.ndttester.com