NASA NTRS · 19680000061
Electronic circuit provides automatic level control for liquid nitrogen traps
Abstract
Electronic circuit, based on the principle of increased thermistor resistance corresponding to decreases in temperature provides an automatic level control for liquid nitrogen cold traps. The electronically controlled apparatus is practically service-free, requiring only occasional reliability checks.
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Turvy, R. R.. 1968-03-01. Electronic circuit provides automatic level control for liquid nitrogen traps. https://ntrs.nasa.gov/citations/19680000061
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