... -application measuring instrument for component surface quality evaluation. Model 2205A surface roughness tester is a multi-applicationmeasuring instrument ... . It is capable ofchecking the workpiece surface roughness on plane ,cylinder,groove and bearingraceway. Specifications: Measuring principle: stylus ... , un-filtered,un-filtered,Gaussian; Surface parameter:Ra,Rc,Rp,Rv,Rz,Rq,Rsm,Rt,Rsk,Rku,Rdq ...