Fitz Mill Particle Size Converter (Calculator)

This is a "Fitz Mill" Particle Size Converter Calculator Data Slide-Chart - it was used to measure volume in microns and inches - Same concept and use as a slide-rule but for industrial "in-the-field" on sight calculations.
- Two sided with sizes from 1 micron (.00004") to 4750 microns (.187")
Use in the chemical catalyst industry (food additives and hygiene products)
- - - - ©1980 The Fitzpatrick Company, Elmhurst, Illinois, U.S.A. *** The Fitzpatrick Co. is an industrial equipment manufacturer operating for over 65 years and the Fitz Mill is a size reducer for dry granulated products, such as catalyst and pharmaceuticals.