Abstract:Abstract. We describe the model and construction of a two-flow (or
divided-flow) humidity generator, developed at LNE-Cnam, that uses mass flow
controllers to mix a stream of dry gas with a stream of humid gas saturated
at 28 ∘C. It can generate a wide range of humidity, with mole
fractions in the range of 0.7×10-6<x<9000×10-6, without using low temperature or high pressure.
This range is suitable for calibrating balloon-borne instruments that
measure humidity in the stratosphere, where x∼5×10-6. The gen… Show more
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