It meets the standards of both ISO2178 and ISO 2361 as well as DIN, ASTM and BS. 1.Productin Name:F&NF Type Coating Thickness Gauge(CM-8855FN)It meets the standards of both ISO2178 and ISO 2361 as well as DIN, ASTM and BS. It can be used both in the laboratory and in harsh field conditions. The F probes measure the thickness of non-magnetic materials (e.g. paint,plastic, porcelain enamel, copper, ...