A vacuum filtration apparatus (900) for detecting microorganisms and particulates
in liquid samples. The apparatus includes a base (901), an absorbent pad
(991), a filter (990), a funnel (930), and a lid (960).
The funnel is releasably attached to the base, and may contain an integral flexible
seal for releasably sealing the filter to the base. The outer wall of the lid may
be segmented to make it flexible, this flexibility allows it to be releasably attached
to the funnel or the base. The apparatus is designed so that any funnel will fit
any base, and any lid will fit any base or any funnel when all parts are manufactured
to normal tolerances. The apparatus may be configured to to keep the filter wrinkle
free in both the dry and wet states.
