Method and apparatus for sensing microbial growth conditions
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United States of America Patent
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Mar 9, 2004
Grant Date -
N/A
app pub date -
Dec 27, 2002
filing date -
Dec 27, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This method and device collect relative humidity data, then evaluate that data using an algorithm to determine if conditions are permissible for fungal growth. The growth condition meter, placed in a building's wall or ceiling, includes a simple controller attached to a memory, a timer, a relative humidity sensor, and a user interface. The device executes an algorithm for determining growth conditions based on a 24-hour history of relative humidity samples. First, the algorithm determines if relative humidity levels follow a cyclical profile similar to typical environmental conditions. In addition, it verifies that enough time is spent below a temporal humidity threshold. Second, the algorithm performs a baseline analysis comparing all samples over the previous 24-hour period to determine if all samples are over a fixed threshold. This allows for a situation where enough time is spent below the temporal threshold but overall relative humidity remains too high.
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