Rotary Evaporator is an instrument that functions to separate a solvent from a solution in order to obtain an extract with a more concentrated content or concentration or according to needs. The working principle of this instrument is carried out by evaporating part of the solvent at its boiling point. This instrument is equipped with a vacuum which can shorten the extraction and evaporation time. Basically, this instrument works by converting electrical energy into motion and heat energy where heat energy is needed to heat the water bath chamber, and motion energy is needed to rotate the round bottom flask. This Rotary Evaporator is used to dry samples in the form of a solution, including organic solution and/or a mixture of water into a paste.