The Heidolph Reax 2 overhead (rotating) shaker has a speed range of 20 to 100 rpm, holds two vessels up to 160mm in height with a total weight of 1kg, has an analog control knob for setting speed, and provides gentle mixing. An adapter (sold separately) allows up to 20 test tubes to be accommodated. This shaker is used in a variety of laboratory procedures, including hematology, medical diagnostics, and materials testing.This laboratory shaker has self-resetting overheating protection and an allowable ambient temperature range of 0 to 50 degrees C at 80% relative humidity. It is Ingress Protection certified IP21.SpecificationsSpeed range20 to 100 revolutions per minute (rpm)Capacity1kgAllowable temperature range0 to 50 degrees C at 80% relative humidityPower230/240V 50/60Hz, 27WWeight5.2kgOverall dimensions23.5 x 51.0 x 18.0cm (H x W x D)H is height, the vertical distance from the lowest to highest point; W is width, the horizontal distance from left to right; D is depth, the horizontal distance from front to back.Laboratory shakers agitate liquids for biological and chemical procedures by repetitively moving the vessels holding the liquids. The types of vessels include glass or plastic bottles, flasks, tubes, and microplates. Shakers are categorized by the type of movement used, which can be orbital (circular), reciprocating, vibrating, rocking, waving (gyrating), rotating (rotisserie), or wrist-action. Typically a shaker will have analog or digital controls for setting the speed and sometimes also the degree of movement. Some shakers have the ability to incubate or refrigerate samples during shaking. Shakers are used in a variety of laboratory procedures, including hemolysis, preparation of emulsions and suspensions, staining, and cell cultivation.Heidolph Instruments manufactures laboratory equipment such as evaporators, peristaltic pumps, and hot plate stirrers. The company, founded in 1938, is headquartered in Schwabach, Germany.What's in the Box?Reax 2 overhead shakerPower cordInstructions