For use in food microbiology, biomedical research, and other industrial and clinical applications. Unique design reduces or eliminates sample contamination. Blending occurs inside sterile disposable bags. Reciprocating stainless steel paddles compress bagged samples against the front door with controlled pressure. Blending usually requires less than sixty seconds, with a temperature increase of less than 1°C. Features microprocessor control, 3 preset speeds, 3 preset time settings plus continous, and safety interlock. Model 400 has variable time settings from 1 second to 99 minutes. Housing is constructed of enamelled cast aluminum alloy. Warranty: 1 year. 110/120 VAC, 60 Hz, single-phase motors.