The simple dealing with from the roughness tester plus the significant repetitive precision characterizes this device. Following touching the button the piezoelectric micro probe of the roughness tester scans the surface inside seconds and shows digitally, based on the preselected Slash-off duration, either the worth Ra, Rz, Rq or Rt. https://deepodirectory.com/listings13061747/the-2-minute-rule-for-surface-roughness-measuring-instrument