Method for Making A Filter Device Having More Than One Filtration Compartment

A method of making a filter device comprising the steps of

• forming a housing for enclosing at least two fluid filtration compartments, said housing comprising at least two longitudinally extending shell portions, one of said longitudinally extending shell portions of the housing describing less than one half of the perimeter of said housing, adjacent filtration compartments being separated from each other by an internal wall,
• placing at least one filter membrane having a first surface and a second surface longitudinally in each filtration compartment;
• closing said shell portions around said filter membranes to form said fluid filtration compartments;
• sealing adjacent edges of said shell portions;
• imbedding ends of said filter membranes in a potting compound;
• and
• capping the ends of said housing.