The following devices are in accordance with ASTM D4414:
Standard ASTM D4414
Specially designed for road markings with the entire range of measuring and testing equipment for determination of wet and dry film thickness, temperature, relative humidity, amount and embedding of drop-on-materials.
Comb gauges for determining the thickness of all types of liquid coatings.
Thickness wheel for checking the thickness of all types of liquid coatings also on convex and concave surfaces.