Low-profile shakers with triple-eccentric drive for uniform motion and microprocessor controls for accurate regulation of shaking speed, 25–500 rpm (less with baffled flasks). Includes audible and visual alarms, timer (0–99.9 hrs) with continuous operation or automatic shut-off at the end of the study. Model 2150 comes with additional stabilizing feet and/or counterweight to balance larger loads on oversized platforms.