Resonant photoacoustic CO 2 spectroscopy with LED light source
Abstract: We have applied resonant photoacoustic sensing for carbon dioxide (CO2) detection using a mid-infrared LED light source at 4.3μm. The pressure signals are detected using a MEMS microphone. A simple cell design has been adapted to achieve an optimal enhancement of the acoustic signal. The cell can be operated both in closed and open configuration, allowing a permanent gas flow. With the components we used a compact and low-cost CO2 sensor can be realized. We present first results of our photoacoustic sensor using the binary gas mixture CO2 / nitrogen. The signals were evaluated measuring the shift in the resonance frequency of the system. The sensor shows sensitivities down to a few percent CO2. Ideas to further enhance the sensitivity of the sensor are discussed
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Notes
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Procedia engineering. - 168 (2016) , 1325-1328, ISSN: 1877-7058
- Event
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Veröffentlichung
- (where)
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Freiburg
- (who)
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Universität
- (when)
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2025
- Creator
- Contributor
- DOI
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10.1016/j.proeng.2016.11.362
- URN
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urn:nbn:de:bsz:25-freidok-1368434
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:25 AM CEST
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Associated
Time of origin
- 2025
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