2010•Hangkong jice jishuRequires access
Contrast and Analysis of Parameters of Three Kinds of Typical Humidity Standard Instruments
Bin Chen
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Abstract
Three kinds of typical standard equipments,DHT-2000 high precision temperature and humidity tester,Vaisala HMP233 temperature and humidity instrument and Syinyei S-1 dewpoint hygrometer,are selected.By use of the humidity calibrating apparatus,the performance parameters of them are contrasted and analyzed in 30%~90% RH humidity range.The results show that DHT-2000 high precision temperature and humidity tester and dewpoint hygrometer have higher measurement acuracy,higher sensitivity and better repeatability.Since the measurement precision of dewpoint hygrometer depends on the environment temperature,its reproducibility is worse when the sampled humidity is higher.