... measurement: Ra, Rz, Rq, Rt 2)Highly sophisticated inductance sensor Surface Roughness Tester:1)Multiple parameter measurement: Ra, Rz, Rq, Rt2)Highly ... instrument is compatible with four standards of site to measure surface roughness of variousmachinery-processed parts, calculate corresponding and clearly display ... mm (5.5x2.2x1.9 inch) Weightabout 420 g SURFACE ROUGHNESS TESTER SRT-6210