Abstract
There is described an apparatus for determining the sensitivity of detector papers toward gases from liquids of low volatility. The paper holder is constructed in such a way that the papers may be moistened, dried, removed, or replaced without disturbing the flow of gas through the rest of the apparatus. The holder also makes possible the comparative testing, under identical conditions, of a number of papers. With auxiliary apparatus, the paper holder permits the use of a carrier air stream of controllable relative humidity.
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