Fluid detection device
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United States of America Patent
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-
May 10, 1994
Grant Date -
N/A
app pub date -
Sep 18, 1992
filing date -
Feb 8, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A device of the type which uses a moving boundary for detecting a fluid analyte. The device includes an impervious container (10, 12, 14) having a fluid entry aperture (20) and containing two contiguous layers. One of the layers is a detection layer (16) in the form of a sheet comprising a reagent to generate a signal by a reaction initiated by the analyte. The other layer (18) is a spreading layer permeable by the analyte position such that analyte entering the container spreads within the spreading layer. The device can be used, for example, as a gas monitor for indicating exposure to hazardous gases or vapours.
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