The Elcometer Fineness of Grind Gauges are used to determine the particle size and fineness of grind of many materials including paints, pigments, inks, coatings, chocolates and other similar products. 

These two channel gauges, are made of hardened stainless steel and have two grooves with a graded slope (dependent on the model chosen). 

Graduated in microns, mils, NS (Hegman) or PCU (North), the gauges have a tolerance of ±2μm (0.08mil).  The groove width for all models is 12mm (0.47”) with a groove length of 127mm (5.0”).

How to use a Fineness of Grind Gauge