Skip to content
Q-Mark Probe Styli: Orders Placed by Noon PT Ship Out Same-Day* | Ultra-Fast Service | Always Guaranteed | Proudly USA Made
Q-Mark Probe Styli: Orders Placed by Noon PT Ship Out Same-Day* | Ultra-Fast Service | Always Guaranteed | Proudly USA Made

Calibration Sphere Guide

Q-Mark offers calibration spheres in various diameters to suit your specific needs. The ideal sphere diameter depends on the size of the stylus you are qualifying.

Here’s what we recommend:

  • For styli less than 1.0 mm diameter, use an 8.0 mm calibration sphere.
  • For styli between 1.0 mm and 2.0 mm diameter, use a 15.0 mm calibration sphere.
  • For styli greater than 2.0 mm diameter, use a 20.0 - 30.0 mm calibration sphere.