... COATING THICKNESS GAUGE CM-8856 is used for measuring thickness and corrosion of pressure vessels, chemical equipment, boilers, COATING THICKNESS GAUGE MODEL CM-8856 COATING THICKNESS GAUGE MODEL CM-8856 COATING THICKNESS ... thickness of non-magnetic materials (e.g. paint, plastic, porcelain enamel, copper, zinc, aluminum , chrome ... measuring range and high resolution.Metric/Imperial conversion ...