G - Physics – 01 – N
Patent
G - Physics
01
N
G01N 15/06 (2006.01) G01N 15/10 (2006.01) G01N 15/12 (2006.01)
Patent
CA 2114674
The investigation of indoor air quality (IAQ) complaints is complex since, unlike industrial settings, there is no obvious source of contaminants. In general, though, the sources of contamination fall into one of three categories - particulates, gases/vapours and microbial material. This patent application relates to the investigation of contamination by particulates, and specifically, particulates of less than 1 micron in aerodynamic diameter.. The most popular, current investigative techniques are: i) to test for carbon dioxide as an estimation of fresh air supply, and ii) static tests for the concentrations of particulates in the air. Once the presence of the dust is verified, attempts are made to identify and eliminate the source. This new technique uses a different logic. Rather than relying on static tests, this technique uses a detector sensitive to minute quantities of sub-micron particles to track sources of any particulates so that they may be addressed. The detector used is a condensation nuclei counter. The key points of the technique are: 1 ) it is an active technique, where the source is aggressively tracked, as opposed to passively monitored. 2) it relies on a meter with both a fast response time and a sensitive detector; 3) the evaluation is usually completed within a matter of hours.
Fogarty Richard
Gowling Lafleur Henderson Llp
Tsi Incorporated
LandOfFree
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