Roughness Tester
A roughness tester is a metrological device design to measure surface roughness. By collecting data from a mechanical stylus that moves along a surface, a roughness tester provides data concerning depth and mean value roughness. Typically, measurements from a roughness tester are reported as micrometers or microns. Depending on the design, a roughness tester may provide areal roughness data using lasers, optics, or interferometers.