9V Battery Operated Surface Roughness Tester can be used in laboratory, inspection area, workshop, or wherever on-site surface roughness testing is required. The Tester is designed for checking surface roughness, with the measured values displayed on a digital readout display. The Surface Roughness Tester is a portable unit that requires 9V battery to operate efficiently. 9V Battery Operated Surface Roughness Tester comes in different specifications to suit industrial requirement.