A SIMPLE AND EFFECTIVE HUMIDITY CONTROL

Abstract
A humidity control suitable to a great range of conditions is described. It will maintain any humidity within 1% at any temp. within the physiol. range. Liquid water is added as needed by an electronically controlled device, and is evaporated in a . simple evaporator. A new type of humidistat more suitable for electronic tubes is described. The humidity maintained was measured with a wet-dry junction thermocouple attached to a recording potentiometer. The water pump used is very simple and effective and may be valuable for purposes other than that described here.

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