... Surface Roughness Tester: 1)Multiple parameter measurement: Ra, Rz, Rq, Rt 2)Highly sophisticated inductance sensor Surface Roughness Tester:1)Multiple ... measurement results on LCD.* Multiple parameter measurement: Ra, Rz, Rq, Rt* Highly sophisticated inductance sensor* Four wave filtering methods : RC, PC ... Rq: 0.005-16.00um/0.020-629.9uinch Rz,Rt: 0.020-160.0um/0.078-6299uinchAccuracyNot more than ?0 ...