It is designed to quickly & easily measure thickness of coatings immediately after they have been applied to substrate.This gauge is also known as COMB, MIL gauge, step gauge & notched gauge.
The gauge incorporates a series if notches cut into their sides much like the teeth of a comb.
The wet film thickness of most organic cotings includes paints, resins, lacquers, etc. may be measured.
The thickness of powder type must be addressed before curing.