What Is Wet Film Thickness Gauges?
Wet Film Thickness Gauges are devices that measure the thickness of a wetted surface on an object.
Most of the wet film thickness gauges are analog type film thickness gauges, and the film thickness gauge is actually applied to the wet surface, and the thickness of the film is measured by visually confirming how wet the film thickness gauge is. It is a destructive inspection because the film thickness gauge is actually brought into contact with the wet surface.
Products that measure wet thickness digitally are also on sale. It can be classified into comb type and roller type. The film thickness can be obtained quickly because it is a manual reading type.
Applications of Wet Film Thickness Gauges
Wet Film Thickness Gauges are used in automotive and other painting processes, food factories, and laboratories.
Examples of specific uses include controlling paint thickness in the painting process, controlling the amount of paint applied in the food manufacturing process, and measuring wetting.
When selecting Wet Film Thickness Gauges, it is necessary to consider the accuracy of the film thickness measurement, the ease of reading, and the size of the amount to be destroyed. There are cheap disposable materials and types that can be washed and used, so you can choose according to the type of liquid you use.
Principles of Wet Film Thickness Gauges
- Comb Type
Wet Film Thickness Gauges have a comb-shaped groove of different heights, equally spaced. When the comb is pressed against the film to be measured, liquid penetrates the grooves. The thickness of the film can be measured by taking a reading from the area where the liquid has not penetrated. The range of film thickness measurement depends on the distance between the groove heights. Inexpensive and disposable, many of these products are suitable for measuring film thickness in cases where cleaning is not easy or chemicals are hazardous to touch directly. - Roller Type
The roller type has a groove in the center of the roller in the centrifugal direction and its grooves are of different heights. The feature of this type is that the part that destroys the liquid is less than that of the comb type.