Bacteria filters with transparent housings

A bacteria filter for use in anesthesiology and respiratory air systems to filter fluid flow at a desired point in a system comprising:

• an enlarged electrically non-conductive, transparent tubular housing having a passageway therethrough and having at one end a reduced tip;
• an electrically conductive connector mounted to the reduced tip;
• an electrically conductive end cap affixed to the end of the housing distal from the reduced tip;
• the end cap having an opening therethrough terminating in a projecting end cap connector;
• a filter element mounted in the housing;
• an electrically conductive portion extending between the end cap and the electrically conductive connector to provide an electrically conductive pathway from end to end of the filter;
• the connector and the projecting end cap connector being adapted to be mounted within a fluid flow system to permit fluid communication with the interior of the housing;
• means between said connector and the projecting end cap providing a fluid flow from said system through one end of the housing, through the filter element and out of the other end;
• and
• the electrically conductive portion extending between the end cap and the electrically conductive connector being a continuous element extending through the tubular housing from end to end between the end cap and the conductive connector and removed from the walls of the housing so as to provide an electrically conductive pathway from end to end of the filter.