What kinds of materials can the coating thickness gauge measure?

The coating thickness gauge can measure the thickness of magnetic or non-magnetic coatings (such as aluminum, chromium, copper, enamel, rubber, paint, etc.) on magnetic metal substrates (such as steel, iron, alloy and hard magnetic steel, etc.) ,and the thickness of non-conductive coatings (such as enamel, rubber, paint, plastic, etc.) on non-magnetic metal substrates (such as copper, aluminum, zinc, tin, etc.). It is a necessary meter for automobile manufacturing, sales, evaluation and metal processing, coating, inspection and other industries.