Self-contained breathing apparatus with emergency filtration device

An emergency air filtration device for use with a self-contained breathing apparatus including a regulator attachment port for attachment of a regulator having a cover of a given configuration, said filtration device comprising:

• a) a filter housing having an outer end and an inner end;
• b) a connector positioned within said inner end for connecting said device to said attachment port;
• c) air filtration media within said housing between said outer and inner ends;
• and
• d) a filtration device cover positioned in front of said outer end, said cover having a outer configuration corresponding to said given configuration.

An air filtration system comprising:

• a) an air supply;
• b) a face mask;
• c) a hose extending from said air supply to said face mask;
• d) a regulator controlling the supply of air from said air supply to said face mask, said regulator having a regulator cover with a given outer configuration;
• and
• e) an emergency air filtration device adapted to replace said regulator if said filtration system malfunctions said air supply is exhausted, said device including a filter housing, and air filtration media within said housing, and a filtration device cover, said filtration device cover having a outer configuration corresponding to the given configuration of said regulator cover.