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A convenient liquid helium level detector

✍ Scribed by J.A. Campbell


Publisher
Elsevier Science
Year
1981
Tongue
English
Weight
63 KB
Volume
21
Category
Article
ISSN
0011-2275

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The para concentration of the hydrogen was measured with a heat conductivity gas analyser using a bridge circuit. 3 The gas analyser was calibrated with the sensitive cells thermostatted at 77 Β° K, using four fixed points which fell on a straight line: 25 per cent parahydrogen (T---300 Β° K); 50-8 pe