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Product Description

GOYOJO SURFACE ROUGHNESS TESTER--PRECISION & VERSATILITY
With 0.001μm precision, the GOYOJO Surface Roughness Tester serves a wide range of industries. From manufacturing to automotive and electronics, its digital convenience and durability ensure reliable surface assessments.
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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