Sling Psychrometer, Thermometer and Humidity Indicator

Sling Psychrometer, Thermometer, and Humidity Indicator

Thermometer readings are obtained by whirling the psychrometer. The psychrometer case is telescoped into the hand-holder to form a precisely accurate slide rule calculator of percent relative humidity. Two thin-bulb thermometers with a fast thermal response, 1ﾰ scale divisions, are clamped rigidly in the case.