A simple controller for an automatic liquid nitrogen filler

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Published under licence by IOP Publishing Ltd
, , Citation I D Reid and M R Hyde 1984 J. Phys. E: Sci. Instrum. 17 555 DOI 10.1088/0022-3735/17/7/003

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1 Australian Atomic Energy Comm., Lucas Heights Res. Labs., Sutherland, NSW, Australia

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Abstract

A controller able to maintain the liquid nitrogen (LN2) level in a cold trap is described. The controller uses a light-emitting diode as the LN2 level sensor, is simple and has been designed to minimise loss of liquid nitrogen in the event of malfunction.

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