連接乾湿計
1979 年 48 巻 9 号 p. 848-854
詳細
1979 年 48 巻 9 号 p. 848-854
The psychrometer reported in this paper is composed of a thermally grafted thermometer and an operational circuit. The ambient temperature (the dry bulb temperature), the wet blub temperature and the difference between the two bulb temperatures are obtained as voltages.
With the psychrometer here reported, the relative humidity is not known from the measurement of dry bulb and wet bulb temperatures alone but from the measurement of the difference between the two temperatures together with either the dry bulb or the wet bulb temperature.
The minimum necessary ventilating velocity of the trial psychrometer with the grafted thermometer is 0.25m/s.
The results of experiments show that the accuracy of the relative humidity measured by the present psychrometer with the grafted thermometer is less than 2%.
