The specialist shaker with uniform rotating motion. Various applications, e.g. for mixing and processing of soil samples. Compact, low-wear drive mechanism. External housing is made of electrolytically galvanized, powder-coated sheet steel. Clearly laid out control panel for easy operation. With LED speed display. Holding device guarantees easy clamping of sample vessels on the shaking rack. Electronic, stepless speed control, constant speed during continuous operation. Rotating rack incorporates ball bearings on both sides, accommodating a max. of 12 flasks/vessels, round or rectangular, up to 110mm max. dia. and 270mm max. height, stacked in 4 levels, each level with 3 holding frames. Drive motion is achieved by an overload protected DC motor. With stainless steel clamping frame for safe securing of the sample vessels. For ambient temperatures from 10 to 40°C. Maintenance-free.