NASA NTRS · 19720000525
Carbon dioxide concentration indicator
Abstract
Device will provide visual indication of concentration of carbon dioxide. It consists of small amounts of absorbent material contained in semipermeable membrane and device to detect color changes. Material will absorb quantity of carbon dioxide proportional to carbon dioxide concentration in atmosphere. Amount of absorption is indicated by color change.
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King, P. H.. 1972-08-01. Carbon dioxide concentration indicator. https://ntrs.nasa.gov/citations/19720000525
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