Can an inert gas flow be used with Findenser? A flow of inert gas (e.g. nitrogen) through the flask will encourage evaporation and may reduce performance of the Findenser. If inert gas is required it should be introduced through the top joint of the Findenser, with all flask ports sealed (using a suitable bubbler to avoid build-up of pressure) and not through a flask sidearm or joint at the bottom of the Findenser. Gas flow should be kept to a minimum.