System and method for detection of a target substance
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United States of America Patent
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Apr 7, 2009
Grant Date -
Jul 22, 2004
app pub date -
Jul 18, 2002
filing date -
Jul 18, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for the measurement of a target substance is provided including a detection apparatus and a reading apparatus. The detection apparatus, or “carrier”, includes a pyroelectric film transducer (“pyroelectric film”) and one or more reagent concentrations (“reagent deposits”) deposited on the film. The reagent deposits are adapted to react with, and thus, detect the presence of a target substance present in the local environment. Upon detection of the target substance by the reagent deposit, the reading apparatus and the pyroelectric film may be used to detect the amount of heat that can be absorbed by the reagent in response to illumination. The pyroelectric film then delivers to the reader a signal corresponding to the heat detected and the reader provides a corresponding indication of the concentration of the target substance detected.
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