Wet film comb gages also know as notch gages are formed on the edge of a piece of material so that each notch has a different clearance from the reference shoulders to its neighbors.
BYK-Gardner offers comb gages in many different materials, such as stainless steel, aluminum or plastic in a variety of shapes: square, rectangle or hexagon. Depending on your application single or dual scale combs in microns / mils are available.
Wet film measurement provides first opportunity to do a quick check of the coating and its application process
Simple low-cost device which is useful whan approximate values are satisfactory
Very useful for coating systems where the dry film thickness can only be measured destructively