Wheel Gauge Wet Film Thickness Gauge The Wheel Gauge uses the scale of wheel rail eccentric wheel to get the wet film thickness, which is expressed in μm. It is suitable for measuring the wet film thickness of paint. A measuring tool for measuring the wet film thickness of paints, varnishes, etc. The thickness gauge can be measured not only on flat substrate, but also on curved substrate with high accuracy. Attentions After use, the thickness gauge shall be cleaned and placed in a dry place.When it is not used for a long time, the thickness gauge shall be coated with oil for antirust treatment. Technical Parameter Measuring range: 0~500um; 0~200um; 0~150um; 0~100umGraduation value: 30um; 20um; 15um; 10um Standard GB/T1764-79GB/T134522-92ISO2808-74 Operation method: Step 1-2 1. Apply the paint on a flat plate of suitable hardness (rigid substrate), the area of the test plate must be large enough so that the distance between the film thickness measurement and either side of the test plate is at least 25mm, and the wet film thickness is measured immediately after application. 2. Fix the test plate on a suitable level base, so that the test plate will not move or jump during the process of measuring the paint film, put the instrument on the wet film of the thickness to be measured, so that the minimum reading is at the top, and the instrument The maximum gap between the eccentric wheel and the wet film is just above the wet film, then roll it forward for half a circle (180°) and repeat the rolling half circle (180°) in the opposite direction, and then move it to check the contact between the central rim of the instrument and the surface of the wet film. position, take the readings and average them into one reading. Operation method: Step 3 3. If the topcoat contains a rapidly volatile solvent or has a low solids content, take at least one additional individual reading on the freshly applied film and calculate the average of these individual readings. [NOTE] -- Although this instrument is suitable for measuring wet film thickness on flat test panels, it can also be used in the field or factory for workpiece surfaces that are bent in only one direction, as long as the substrate is not bent between the two concentric wheels. It can affect the measurement of the instrument. [Result evaluation] When using the linear center section of each scale, i.e. using the section around 80% of the scale's total range. [Precautions] 1. After the paint is applied on the hard flat test panel in the laboratory or on the surface of the workpiece to be painted in the field, the thickness of the wet paint film should be measured as soon as possible to reduce the paint film caused by solvent volatilization thinning phenomenon. 2. After use, the instrument should be cleaned and placed in a dry place. 3. When not in use for a long time, the instrument should be coated with oil for anti-rust treatment.