Powerful suction washer in tried and tested C- Gerhardt quality for extraction and washing out of the inorganic acid fumes created during digestion. For digestion with sulphuric acid in nitrogen determination using the Kjeldahl method, digestion with aqua regia (heavy metal digestion) and with perchloric acid/nitric acid (hydroxyproline digestion). Optimum extraction at exceptionally low operating costs. With two-stage preseparator for elimination and neutralisation. Continuously adjustable suction capacity. Can be combined with all C. Gerhardt digestion units and classic digestion equipment with suction.