... measurement: Ra, Rz, Rq, Rt 2)Highly sophisticated inductance sensor Surface Roughness Tester:1)Multiple parameter measurement: Ra, Rz, Rq ... parameters.When measuring the roughness of a surface, the sensor is placed on the surface and then uniformly slides along ... Multiple parameter measurement: Ra, Rz, Rq, Rt* Highly sophisticated inductance sensor* Four wave filtering methods : RC, PC-RC, GAUSS and D ...