Rolling Wheel Wet Film Thickness Gauge
The Rolling Wheel Wet Film Thickness Gauge has long been the standard for measuring wet film thickness in the coatings 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 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 value are casted on 1 side. We offer four basic models in various ranges. All models have an accuracy of 2.5µm (±0.0001 in）or 2.5% full scale, whichever is greater.
| Model | Wet Film Thickness | Scale |
| BGD 532-1 | 0-100 µm | 5 µm |
| BGD 532-2 | 0-200 µm | 10 µm |
| BGD 532-3 | 0-500 µm | 25 µm |
| BGD 532-4 | 0-1.000 µm | 50 µm |
