| 摘要 |
<p>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.</p> |
