发明名称 |
In-line real time air monitor |
摘要 |
An in-line gas monitor capable of accurate gas composition analysis in a continuous real time manner even under strong applied vacuum conditions operates by mixing an air sample with helium forming a sample gas in two complementary sample loops embedded in a manifold which includes two pairs of 3-way solenoid valves. The sample gas is then analyzed in an ion trap mass spectrometer on a continuous basis. Two valve drivers actuate the two pairs of 3-way valves in a reciprocating fashion, so that there is always flow through the in-line gas monitor via one or the other of the sample loops. The duty cycle for the two pairs of 3-way valves is varied by tuning the two valve drivers to a duty cycle typically between 0.2 to 0.7 seconds.
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申请公布号 |
US5780717(A) |
申请公布日期 |
1998.07.14 |
申请号 |
US19970838954 |
申请日期 |
1997.04.23 |
申请人 |
LOCKHEED MARTIN ENERGY RESEARCH CORPORATION |
发明人 |
WISE, MARCUS B.;THOMPSON, CYRIL V. |
分类号 |
G01N33/00;(IPC1-7):G01N30/14;G01N9/32;G01N27/16;H01J49/04 |
主分类号 |
G01N33/00 |
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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