... probes measure the thickness of non-magnetic materials (e.g. paint, plastic, porcelain enamel, copper, zinc, aluminum , chrome etc.) on ... on non-magnetic metals. It is used on anodizing, varnish, paint, enamel, plastic coatings, powder, etc. applied to aluminum, brass, ... .Optional accessories:RS-232C cable & software:1.USB adaptor for RS-232C2.Bluetooth interface COATING THICKNESS GAUGE MODEL CM-8856 ...