Development of NIS Two-Temperature Humidity Generator  

作　　者：Mohamed Gamal Ahmed Said Mazen Doaa Abd El-Gelil 

机构地区：[1]National Institute for Standard, Giza, Egypt [2]Physics Department, Faculty of Science, Zagazig University, Sharkia, Egypt

出　　处：《Journal of Physical Science and Application》2014年第7期436-439,共4页物理科学与应用（英文版）

摘　　要：Abstract： This paper describes the development and characterization of a two-temperature （2-T）, constant pressure humidity generator It relies on the saturation of a stream of gas flowing over a water surface maintained at constant, well-known, temperature. It was built in order to improve the uncertainties of the dew-point temperature and humidity scales realization at the National Institute for Standard （NIS） in the dew-point range from -50 ℃ to ＋ 10 ℃. Several experiments were carried out in the above mentioned range in order to characterize the generator. Characterization comprised studies of its saturator efficiency, temperature stability and a comparison with a calibrated chilled-mirror hygrometer. The results of the efficiency tests showed good performance of the generator as described below. For uncertainty of measurements, a thorough analysis was also described representing estimations of contributions for all the sources that affecting measurements.

关 键 词：Dew-point HYGROMETER two-temperature generator uncertainty. 

分 类 号：TH837[机械工程—仪器科学与技术] TP393.09[机械工程—精密仪器及机械]