How It Works: When measuring surface roughness, the GOYOJO Surface Roughness Tester places the sensor on the surface and then uniformly slides it along the surface using the internal mechanism. The sensor captures surface roughness with its sharp built-in probe. This roughness causes displacement in the probe, leading to a change in the induction quantity of the induction coil, thereby generating an analog signal proportional to the surface roughness at the output of the phase-sensitive rectifier. Specifications: Display Resolution 0.001μm Measurement Range: Ra 0.025-12.5μm Ra, Rq 0.005-16μm Rz, Ry, Rt, Rp, Rv, Rmax, R3z 0.02-160μm RS, RSm 1mm Rr 0-100% (9%Rt) Rsk 0-100% Range Options ±20μm, ±40μm, ±80μm Filters RC, PC-RC, GAUSS, D-P Sampling Lengths 0.25mm, 0.8mm, 2.5mm Maximum Drive Travel 17.5mm (0.7 inches) Minimum Drive Travel 1.3mm (0.052 inches) Indication Error ≤10% Variability in Indication ≤6% Specifications: Display 128X640 LED Dot Matrix (Self-illuminating) External Interface USB Power Source Built-in rechargeable lithium-ion battery or external power adapter Dimensions 140 x 52 x 48(5.51 x 2.05 x 1.89 inches) Weight 440g(0.97 pounds) Sensor Performance Specifications: Detection Principle Inductive Probe Contact Force 4mN (0.4gf) Probe Angle 90° Probe Tip Radius 5μm Guide Longitudinal Radius 45mm

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