These condensers are majorly used in research laboratories. A double-surface condenser has a water jacket both on the outside and through the center of the condensing tube. It is required where the condenser liquid is very volatile. Hence for distilling ethers, alcohols, esters, aromatics, petroleum products and essential oils, these condensers are widely used.

Highly efficient coil condenser suitable for condensing very volatile liquids. Inner coil with large surface area. Outer water jacket to avoid vapour creep around the coil. Coil and jacket are highly independent and can be fed from separate water supplies for maximum efficiency.

Double Surface condensers with a coil as the inner surface provides approximately twice the surface area of plain coil condensers of the same effective length.