A rotary vacuum film evaporator with a “Digital Cold Trap” is a laboratory instrument used to concentrate or remove solvents from a sample. The rotary vacuum film evaporator works by applying a vacuum to a rotating flask containing the sample, causing the solvent to evaporate and be removed from the sample.

The solvent vapor is then condensed and collected in a separate flask. The “Digital Cold Trap” refers to the use of a cooled condenser to trap and condense the solvent vapor before it is collected. This helps to prevent any thermal degradation of the sample and ensures a high-purity product. The digital aspect likely refers to the use of electronic temperature control and monitoring for the cold trap, allowing for precise temperature regulation and increased efficiency. This type of rotary vacuum film evaporator is commonly used in chemical and pharmaceutical research, as well as in the preparation of samples for analysis.