Removable insert for a test unit having a light source for illuminating an aerosol test chamber

A removable aerosol test chamber configured to be inserted into and removed from an optical test unit having optical components including a light source for illuminating an aerosol sample directed into said removable aerosol test chamber and at least one detector for detecting at least one characteristic of light illuminating the aerosol sample directed into said removable aerosol test chamber, said removable aerosol test chamber comprising:

• (a) a removable housing having an aerosol test chamber, an aerosol inlet and a light inlet, said aerosol inlet of said removable housing being configured to introduce an aerosol sample into said aerosol test chamber, said light inlet being configured to direct light from a light source into said aerosol test chamber when said removable aerosol test chamber is installed in an optical test unit in an operating position;
• and,
• (b) at least one film connected to said removable housing, said film be disposed such that at least a first portion of light illuminating the aerosol sample will pass through said at least one film before the first portion of light is detected by the at least one detector, said at least one film being connected to said removable housing such that said at least one film is removed from the optical test unit with said removable housing, wherein said at least one film is a filter, wherein said filter is one of:
• (i) an optical filter for preventing a second portion of light illuminating the aerosol sample from passing through said optical filter;
• and, (ii) an aerosol filter for preventing aerosol from passing through said aerosol filter.

A removable insert configured to be inserted into and removed from a test unit having a light source for illuminating an aerosol sample directed into an aerosol test chamber and at least one detector for detecting at least one characteristic of light illuminating the aerosol sample directed into the aerosol test chamber, said removable insert comprising:

• (a) a removable support configured to be inserted into and removed from the test unit;
• and,
• (b) said removable insert further including each of the following:
• (i) at least one filter, said at least one filter being connected to said removable support such that said at least one filter is removed from the test unit with said removable support, said at least one filter being disposed such that at least a first portion of light from the light source will pass through said at least one filter before the first portion of light is detected by at least one detector of the test unit;
• and,
• (ii) a particle collection means for collecting particles from the aerosol sample, said particle collection means being operably associated with the removable support such that particles collected by said particle collection means are removed from the test unit upon removal of the removable support from the test unit.