发明名称 |
Precise measurement system for barrier materials |
摘要 |
A system is provided for measuring transmission characteristics of a gas of interest through a barrier material wherein a sealed test gas chamber is provided on one side of the barrier material and an aligned sealed measurement chamber is provided on the opposite side of the barrier material. A rough vacuum is pulled in the test gas chamber and a high vacuum pulled in the measurement chamber to establish a set pressure differential therebetween. A mass spectrometer having partial gas sensitivities of 5x10<-4 >Torr or lower in fluid communication with the measurement chamber determines permeation of the test gas of interest through the barrier material.
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申请公布号 |
US6766682(B2) |
申请公布日期 |
2004.07.27 |
申请号 |
US20010037602 |
申请日期 |
2001.10.19 |
申请人 |
DESERT CRYOGENICS LLC |
发明人 |
ENGLE FRANK W.;BRIGHT CLARK I. |
分类号 |
G01N15/08;(IPC1-7):G01N15/08 |
主分类号 |
G01N15/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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