Surface Roughness Comparators

TQC Sheen


What is Surface Roughness Comparators

Surface roughness comparators are used within industry to measure or verify the as-manufactured surface finish (roughness) of a part or assembly. Comparators are selected and used based on the manufacturing process used to create a particular surface finish. Industries standard manufacturing specific roughness comparator are available for the following process:

  • Casting
  • Conventional machining
  • Surface Turned
  • Shot Blast and Grit Blast

Typical of surface roughness comparators:

TQC Sheen Steel Surface Roughness Comparators.


TQC Comparison standard according to ISO 8503 part 1 made of quality steel. Indicates the surface condition of blasted steel according to ISO 8503 in grades of fine, medium, and coarse. Can be used in accordance with ASTM D4417 Method A, ISO 8503-1, ISO 8503-2. Comparison standard according to ISO 8503 part 1 made of quality steel. Indicates the surface condition of blasted steel according to ISO 8503 in grades of fine, medium, and coarse. The Surface Roughness Comparator for grit-blast and shot-blast surface profile comparison measurement of blast-cleaned steel. The Surface Roughness Comparator is supplied in a protective Wallet.

When steel has been blast-cleaned, the surface consists of random irregularities with peaks and valleys that are not easily characterised. Because of this random nature, it is recommended that the profile should be identified as either angular (where grit abrasives have been used) or dimpled (where shot abrasives have been used) and that they should be graded as fine, medium or coarse using the four segments on the Comparator. Fine-grade profiles equal to segment 1 and up to but excluding segment 2. Medium-grade profiles equal to segment 2 and up to but excluding segment 3. Coarse-grade profiles equal to segment 3 and up to but excluding segment 4.

Tqc Surface Roughnes Comparator DiscSurface Roughness Comparators


TQC Comparator Disc Feature:

  • High purity nickel reference plates
  • Electro formed profile
  • Each profile copied from a certified mild steel master
  • Sturdy leather wallet to protect the test surfaces when not in use
  • Available for shot- and also grit blasting


KTA Surface Profile Comparator.


Comparators for determining surface roughness by both touch and sight. Conforms to ASTM D4417. The KTA standard not only has 5 different grades of roughness but also three different versions. Its also available in Imperial units. The Keane-Tator Surface Profile Comparator assess surface profile depth (generated by abrasive blast cleaning) not only quickly and also easily with these durable 3″ reference discs.

Through the hand held illuminated magnifier on the five segments comparator reference discs for view the blast cleaned surface. Three reference discs are available; the disc selected is based on the abrasive used to prepare the steel surfaces. Reference disc choices include first for surfaces prepare with sand, secondly for surfaces prepared with steel shot and the last for surfaces blast cleaned with a grit or slag abrasive. Each disc is a high purity nickel electro-formed copy of a master disc duplicated to within +/- 50 micro inches. The standard kit includes a choice of one reference disc (choose upon ordering) in a vinyl pouch and an illuminated magnifier equipped with a magnet to hold the reference disc in place during inspections. Conforms to ASTM D4417, Method A.

Suface roughness comparator TQC


Surface roughness Comparator

Surface profile comparator Disc










Comparators allow the estimation of surface roughness by both touch and sight. Surface Profile: The proper and effective preparation of a surface prior to coating is essential. The correct roughness or profile has been generated is essential, if the profile is too low, the adhesion of the coating to the surface will be reduced. Too high and there is the danger that the profile peaks will remain uncoated – allowing rust spots to occur.

KTA Surface Roughness Comparators Specification

  • Three version: sand, grit and shot
  • Five different grades of roughness in each comparator
  • Designed to be used with the illuminated magnifier.
  • Available in Imperial units only.

For more detail and information please contact us.


TQC Sheen

What is TQC Sheen Our brand is known for innovative paint test equipment. TQC Sheen offers a wide variety of products. Including a range of wash ability testers, appearance meters, coating thickness gauges, automatic film applicators and bresle patches. All products are designed to meet the highest quality standards. QUALITY In  our brand line of business where quality is the keyword for our customers. We decided to have our organisation certified according the ISO 9001 standards by “Det Norske Veritas”. High quality products are supplied and maintained by our efficient organisation following well-structured procedures. And also always keeping the customers wishes in the first place! As part of Industrial Physics – a global packaging, product, and material test and inspection partner – we’re able to protect the integrity of manufacturers, production lines, and laboratories across a multitude of industries all over the world. We can help you to understand anything you need to know about your paints and surface coatings. The TQC Sheen name has been recognized as a leader in innovative paint test equipment since 1947. We make all kinds of testing devices. From washability testers, appearance meters and coating thickness gauges – through to automatic film applicators and bresle patches. PT. Cuanli Perkasa Jaya is one of TQC Sheen worldwide distributors located in Indonesia
TQC Sheen