摘要
本文介绍一种测量近地层中温度和湿度梯度的热电偶干湿表。仪器具有相当高的灵敏度(0.05℃/mm),实际观测时精确度则达到±0.02℃。仪器的外形和通风干湿表中的玻璃温度表相同,线路简单,使用方便,且相当坚固。
A thermocouple psychrometer suitable for temperature-humidity and gradient measurements for field work is discribed. It possesses the following characteristics.1. The time-lag constant is 26 sec for wet-bulb, and 88 sec for dry-bulb, when the ventilation is 3 m/s.2. The relative accuracy is within ±0.02℃, when used in the field.3. The themocouple junction is sealed in a glass tube, with a dimension similar to that of a glass thermometer using in the Assman psychrometer. Its construction is simple and strong, hence it is convenient for micrometeorological measurements.The electric circuit is also given.
出处
《北京大学学报（自然科学版）》
CAS
1960年第1期73-76,共4页
Acta Scientiarum Naturalium Universitatis Pekinensis
