NASA NTRS · 19680000341
Superconductive thin film makes convenient liquid helium level sensor
Abstract
Sensor consisting of superconductive film mounted on a dipstick measures the level of liquid helium in a Dewar flask. The sensor is made by depositing a thin film of niobium metal to a thickness of 2000 angstroms on a quartz substrate, which is then mounted on a graduated dipstick.
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Becker, H. H.. 1968-09-01. Superconductive thin film makes convenient liquid helium level sensor. https://ntrs.nasa.gov/citations/19680000341
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