Pressure Regulator for a Low-Pressure Continuous-Flow Ionization Chamber
- 1 May 1956
- journal article
- research article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 27 (5) , 309-310
- https://doi.org/10.1063/1.1715552
Abstract
A description is given of an automatic pressure‐regulating device for a continuous‐flow ionization chamber operated in the pressure range of 1 to 10 mm Hg. The pressure monitor consisted of an oil manometer, a light source, and two phototubes arranged whereby any small change in pressure gave rise to a corresponding electrical signal. This signal was used to control the power to a thermal gas flow valve. The regulator was capable of maintaining the pressure constant to within 0.03 mm Hg for a period of at least 24 hr.Keywords
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