Measuring and testing – Gas analysis – By vibration
Reexamination Certificate
2008-07-15
2008-07-15
Williams, Hezron E. (Department: 2856)
Measuring and testing
Gas analysis
By vibration
C073S024020
Reexamination Certificate
active
11485129
ABSTRACT:
A method for analyzing a target analyte gas concentration using a photoacoustic spectroscopy cell comprising:i) a modulatable light source which provides optical radiation at an absorption wavelength of a target analyte;ii) a resonant acoustic chamber for containing said analyte;iii) a microphone positioned within said chamber whereby the acoustic reactance of the microphone is substantially equal but opposite in value to the acoustic reactance of the chamber at a selected cell resonance frequency.
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Burkard Herbert
Finesse Solutions LLC.
Fitzgerald John
Williams Hezron E.
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