[MW:13256] Surface roughness measurement instruments.

Dear Experts,

I work as inspection Engineer. When i go for Blasting inspection, contractor provided  me profile comparator for surface roughness measurement.

Contractor do  Grit blasting in the shop.

I need to measure surface roughness  -  75-100 microns      Painting system No#1

                                                            50-75 microns        Painting system No#2

Queries

Q 1: Comparator is enough for surface roughness measurements.

Q2: Is any other tools available for roughness measurement?.

Q3:  What is the normal industry practice.


Pl. provide your valuable suggestions as i'm new for painting activities.

Rao.