Rolling Wheel Wet Film Coating Thickness Gauge Supplier in Mumbai & India has long been the standard for measuring wet film thickness in the Coating Thickness Gauge industry. U.S.Patent No.3, 128,558. The gauge consists of an eccentric inner wheel, supported by two large outer concentric wheels. At a specific point, the inner wheel touches and picks up the wet film when the gauge is rolled on the coated surface. The critical clearance may be read on a rotating scale Both the body of the gauge and the centre holder are made of high-grade stainless steel. The scale values are cast on 1 side. Biuged offers three basic models in various ranges. All models have an accuracy of 2.5 m 0.0001 in or 2.5% full scale, whichever is greater.