... probes measure the thickness of non-magnetic materials (e.g. paint,plastic, porcelain enamel, copper, zinc,aluminum , chrome etc.) on magnetic ... i s u s e d o n anodizing, varnish, paint, enamel,plastic coatings, powder, etc. applied to aluminum, brass, non ... : 0.1 μm (0~99.9μm); 1 μm (over 100μm)Accuracy: ±1~3%n or 2.5 μm or ...