METHOD FOR THE CONTINUOUS MEASUREMENT OF THE PARTIAL PRESSURE OF GASES AND VAPORS

摘要

20365-2537 A method and apparatus are described for the simple and direct measurement of the amount of volatile substances, such as ethanol and ammonia, in gases or vapors, especially air. The procedure employs using an optical system to observe a change in color in a sensitive optical filter, the color of the filter depending upon the amount of volatile substance present.