Kusters Water Grit Classifiers utilize carefully sized settling hoppers to provide accurate surface settling rates. The hopper is attached to a discharge screw assembly to remove the settled and washed grit. Classifiers are available in both single and dual designs and can be fitted with cyclone separators and designed with a retractable lower bearing assembly if desired. The grit classifiers typically have ~ 30% moisture content, with ~ 10% organics. If a cleaner, less odorous grit is required, A Kusters Water grit washer can be provided that will provide ~15% moisture, and 3-5% organics.