DIRECT MEASUREMENT OF HIGH-PRESSURE GAS DENSITY WITH AN ION-CHAMBER DENSITOMETER.
The dependence of ion-chamber current on the density of the filling gas has been investigated, experimentally and analytically, to explore the use of an ion chamber as a high-pressure gas densitometer. A flat-plate ion chamber with a self-contained beta-particle source was used in experiments with methane, nitrogen, and carbon dioxide and for pressures up to 2000 psia and densities up to 9lbm/cu ft. Over an appreciable density range, the linearity of the current-density response was good with a static sensitivity of about 10** minus **1**0 amp/s(lbm/(cu ft) and a reproducibility of plus or minus 0. 5%. Variables which could be used to increase the static sensitivity and the linear range were identified.
Friar, BW; Glower, DD; Marco, SM
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