| abstract |
A filter assembly includes a housing having a polymeric membrane and bounding a compartment, the housing having an inlet opening in communication with the compartment and a first outlet opening in communication with the compartment. The first filter comprises a porous filter body through which gas can pass, and the porous filter body has a pore size of less than 1 μm, the first filter is coupled to the housing such that the The filter body is at least partly housed within a compartment of the housing, and thus gas passing through the compartment of the housing from the inlet opening to the first outlet opening must pass through the filter main body. |