The Pss Nicomp Accusizer 780A Autodiluter Particle Sizing System incorporates a series of wide dynamic range sensors with a single stage exponential diluter to provide a flexible high resolution, accurate, sensitive particle sizer. It provides particle size information with unprecedented resolution and accuracy. It is especially suited to providing information on particle size distributions (PSDs) that are on scale but is not limited in the statistical information that it can provide on tails of mostly submicron distributions. This patented module eliminates the need for manual dilution of concentrated samples. Autodilution makes particle size analysis quick and easy, with no training required. Results are highly reproducible.