发明名称 |
GAS SENSOR BASED ON DYNAMIC THERMAL CONDUCTIVITY AND MOLECULAR VELOCITY |
摘要 |
An apparatus and method for gas detection. The apparatus comprises a) a sample chamber (4) for holding a gas sample, b) a sealable vacuum port (8) in fluid communication with the sample chamber, for evacuating the sample chamber, c) a sealable inlet port (6) in fluid communication with the sample chamber, for introducing the gas sample into the evacuated sample chamber, and d) a thermal conductivity sensing element (10) at least partly disposed within the sample chamber, for measuring the thermal conductivity of the gas sample. A gas sample released into the evacuated sample chamber requires a time interval to contact the thermal conductivity sensing element. The time interval is a measure of gas speed. Thermal conductivity and temperature of the gas sample are measured following determination of gas speed. By determining three parameters in a single sample of gas, different gas mixtures having similar thermal conductivities can be distinguished.
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申请公布号 |
WO2007038242(A8) |
申请公布日期 |
2007.10.18 |
申请号 |
WO2006US36925 |
申请日期 |
2006.09.21 |
申请人 |
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发明人 |
NORBECK, JOSEPH, N.;PARK, CHAN, SEUNG;MCCLANAHAN, MICHAEL;HACKETT, COLIN, E. |
分类号 |
G01N25/18 |
主分类号 |
G01N25/18 |
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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