Sensitive photoacoustic detection of methane (CH4), hydrogen chloride (HCI) and water vapour (H2O) in the near-infrared range using semiconductor DFB lasers is reported. A detection limit of 0.17 ppm of CH4, 0.2 ppm of HCI and 0.024 ppm of H2O (signal-to-noise ratio = 3) is reached using a properly designed photoacoustic cell operating in its first longitudinal mode.
Titre
Sub-ppm multi gas sensing based on photoacoustic spectroscopy using DFB laser diodes
Publié dans
4. Konferenz über Optische Analysenmesstechnik in Industrie und Umwelt (OPTAM’04)
Volume
1863
Pages
189-196
Présenté à
4. Konferenz über Optische Analysenmesstechnik in Industrie und Umwelt (OPTAM’04), Düsseldorf, Germany, October 7-8, 2004
Date
2004
Editeur
40001 Düsseldorf, Germany, VDI Verlag GMBH
Date de création de la notice
2011-02-04
