... : Ra, Rz, Rq, Rt 2)Highly sophisticated inductance sensor Surface Roughness Tester:1)Multiple parameter measurement: Ra, Rz, Rq, ... is compatible with four standards of site to measure surface roughness of variousmachinery-processed parts, calculate corresponding and clearly ... generate analogue signal, which is in proportion to the surface roughness at output end of phase-sensitive rectifier.The ...