Method and apparatus for in situ gas concentration measurement
摘要
A method and apparatus for in situ measurement of the concentration of a gas with a frequency modulated tunable diode laser is disclosed. The sampling cell, which is mounted in the flow of gases to be measured, is a Herriott cell. Gas enters the sampling cell through sintered metal filters that prevent entrance of particulates. Signals from a sample detector and a null detector are compared to eliminate interference patterns from the laser optics. High accuracy dynamic calibration of the apparatus is also disclosed.
申请公布号
US6064488(A)
申请公布日期
2000.05.16
申请号
US19970870704
申请日期
1997.06.06
申请人
MONITOR LABS, INC.
发明人
BRAND, JOEL A.;MONLUX, GARTH A.;ZMARZLY, PATRICK;FETZER, GREGORY J.;HALSTED, BENJAMIN C.;GROFF, KENNETH W.;LEE, JAMINE;GOLDSTEIN, NEIL;RICHTSMEIER, STEVEN;BIEN, FRITZ