Ripple-free liquid-nitrogen level controller for long-term operation
- 1 June 1983
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 54 (6) , 759-761
- https://doi.org/10.1063/1.1137470
Abstract
This article describes the design features, construction, and operation of a liquid-nitrogen level controller which can be used continuously over a period of several weeks. Liquid level is sensed by pairs of thermistors mounted on a dip stick. Replenishing of liquid nitrogen is achieved as a result of self-pressurization of a tank containing the cryogen. The transfer system ensures a ripple-free liquid surface during the replenishing operation. This level controller has been a part of a cryostat for diffusion measurements in liquefied inert gases.Keywords
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