VAISALA电容式湿度传感器测定二氧化碳气体中微量水分的研究  

Research on Test of Moisture Contained in Carbon Dioxide By VAISALA Capacitive Humidity Sensor

作　　者：于洋[1] 刘键夫 单晓萍[1] 宋庆明[1] 赵敏[1] 

机构地区：[1]中昊光明化工研究设计院有限公司大连光明化学工业气体质量监测中心有限公司,辽宁大连116031

出　　处：《低温与特气》2016年第2期42-45,共4页Low Temperature and Specialty Gases

摘　　要：以自制标准水发生器发生的湿气为测试样品,利用不同的测试样品对两种不同型号的VAISALA电容式湿度传感器进行大量实验。结果表明:正常环境条件下,两种传感器稳定性良好,其输出信号的响应值与水分含量(露点)在特定区间内呈一定的线性关系;VAISALA DRYCAP DMT 152与242两种类型传感器可以分别对露点-80℃和露点-67℃的水分含量给出稳定准确的响应值,前者的检测限要低于后者且适合露点低于-60℃的二氧化碳产品气的测量;使用VAISALA DRYCAP传感器可以满足二氧化碳中微量水分的测定,但需要水标准气体对其进行定期校准。Large numbers of experiments were done with different test samples by using two types of VAISALA capacitive humidity sensors,and the test sample was moisture which was generated by self-made standard generator,The results showed that the two types sensors had good stability under normal environment condition,the response of the output signal（ dew point） was a linear relationship with water content in a specific interval,sensors of VAISALA DRYCAP DMT 152 and 242 could give stable and accurate responses value of moisture content for- 60℃ and- 80℃,The detection limit in the former was lower than that in the latter. The former was fit for the carbon dioxide gas which dew point is lower- 65℃.and content of moisture in carbon dioxide could be measured accurately by VAISALA DRYCAP sensor,but needed to be calibrated by standard gas regularly.

关 键 词：湿度传感器 响应值 露点 检测限 二氧化碳 

分 类 号：O659[理学—分析化学] TP212[理学—化学]