NASA NTRS · 19720000145
A reliable liquid helium detector
Abstract
Detector and indicator system, utilizing commercial perforated germanium cryogenic thermometer as level sensor containing adjustable level discriminator with indicators, operates reliably over pressure range from 50 to 900 mm Hg without electronic adjustments.
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Krawczonek, W. M., Stephenson, B.. 1972-05-01. A reliable liquid helium detector. https://ntrs.nasa.gov/citations/19720000145
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