The HN-D Pen style Leeb Hardness Tester from Sauter. Offering advanced features, ideal for a wide range of applications.
The Hardness Tester works by accelerating the internal bounce module against the tested item. Depending on object hardness, the kinetic energy of the module is absorbed. Speed reduction is measured and converted to hardness values.

User-friendly operation
LCD display
360° Measurement directions possible
Measurement value display
Internal data memory
USB data output
Mains or battery powered

Parallels, Surface Finish & Hardness

Surface Finish

Any machined component has a surface geometry which consists of three basic elements:

Form or Curvature - Whether the surface has irregular bumps or dimensional changes
Waviness - Whether the surface has regular repetitive ripples or patterns (e.g. milling patterns)
Roughness - The shapes or irregularities that are smaller than, and form part of the waviness pattern (e.g. material micro-structure)

Waviness and roughness are traditionally the most difficult elements to measure when comparing surface finish, however, they have a radical effect on the performance of the finished component. Variations will cause aesthetic appearance changes, component wear variations, oil retention variation etc. Many manufacturers therefore specify a range of roughness values which their components should be manufactured to, often expressed as: Ra, Rq (RMS), RzDIN, Ry, Sm,mm.