... GB4956). It uses computer technology and can measure the coating thickness of objects without any physical damage.The instrument can ... (such as iron, nickel) non-magnetic coverage layer (such as: paint, plastic, enamel, copper, aluminum, zinc, chromium, etc.). It not ... can be applied to measure the thickness of plating layer, paint layer, porcelain enamel layer, aluminum tile, copper tile, Babbitt ...