Thermo-Electron RVT-4104. A refrigerated vapor trap specifically designed for efficient trapping of high boiling solvents such as DMSO and DMF in the SpeedVac DDA systems. Its constant temperature refrigeration system set at -104Â°C creates optimum cryopumping conditions for low-boiling solvents such as chloroform and methylene chloride. Used with glass condensation flask (GCF400/GIT 400, not included) to allow for the collection of liquid into a self contained jar for easy draining. Features a rapid cooling time for minimized waiting period, CFC and HCFC free refrigerants, and a digital LED temperature readout.