Safe working under normal pressure with sensitive mixtures of substances in an isolated atmosphere. The gassing connections in the working area enable work to be carried out in an atmosphere displaced with nitrogen or noble gas.

Integrated connection piece for exhaust air and polyethylene lid. Iris port openings and cable lead-ins made of polyethylene and silicone.There are two cross-slotted silicone discs in each access opening and in each cable lead-in. These are mounted offset so that the overlapping segments close off access when not in use, while at the same time the interior is easily accessible.When the extraction system is switched on, these openings are also used to ensure pressure equalisation through air flowing in. The connection to the extraction system is made via the integrated connection piece on the top. When working without extraction, the passage can be closed with a lid.