We sell high quality used Allihn condensers from European top brands, such as Schott Duran, at 40 % of the new price. Every piece of glassware is “as new” and has been controlled and cleaned before offering them for sale. If a piece of glassware is very slightly damaged, than we sell this piece as B quality glassware. B quality glassware functions properly and is a lot cheaper. For the used laboratory glassware we limit ourselves to the Dutch market as the transportation costs to other countries probably exceed the savings in buying used glassware.
Allihn Condensers consist of an inner tube (where the substance condenses), surrounded by an outer tube (where the coolant flows), just like Liebig Condensers. However, in the case of Allihn Condensers, the inner tube has a series of “bulbs”. These bulbs increase the surface area of contact between the outer tube and the inner tube. Thus, they have good effectiveness.
Allihn Condensers are great for refluxes, but they can’t be used in distillations (unless it is a distillation where the condenser is held vertically). This is because the substance would condense and get trapped in the side of the bulbs. Usually, they are the condensers seen being used with Soxhlet Extractors.