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Sensors 2010, 10(10), 9359-9368; doi:10.3390/s101009359
Article
A Sulfur Hexafluoride Sensor Using Quantum Cascade and CO2 Laser-Based Photoacoustic Spectroscopy
Mila Rocha 1 
, Marcelo Sthel 1,*
, Guilherme Lima 1 , Marcelo da Silva 1 , Delson Schramm 1 , András Miklós 2 and Helion Vargas 1
, Marcelo Sthel 1,*
, Guilherme Lima 1 , Marcelo da Silva 1 , Delson Schramm 1 , András Miklós 2 and Helion Vargas 1
1
Laboratório de Ciências Físicas LCFIS, Universidade estadual do Norte Fluminense UENF, Av. Alberto Lamego 2000, Campos dos Goytacazes, Rio de Janeiro, Brazil
2
Fraunhofer Institute for Building Physics, Stuttgart, Germany
* Author to whom correspondence should be addressed.
Received: 30 August 2010; in revised form: 29 September 2010 / Accepted: 3 October 2010 / Published: 18 October 2010
(This article belongs to the Special Issue Gas Sensors - 2010)
Download PDF Full-Text [223 KB, uploaded 18 October 2010 14:07 CEST]
Abstract: The increase in greenhouse gas emissions is a serious environmental problem and has stimulated the scientific community to pay attention to the need for detection and monitoring of gases released into the atmosphere. In this regard, the development of sensitive and selective gas sensors has been the subject of several research programs. An important greenhouse gas is sulphur hexafluoride, an almost non-reactive gas widely employed in industrial processes worldwide. Indeed it is estimated that it has a radiative forcing of 0.52 W/m2. This work compares two photoacoustic spectrometers, one coupled to a CO2 laser and another one coupled to a Quantum Cascade (QC) laser, for the detection of SF6. The laser photoacoustic spectrometers described in this work have been developed for gas detection at small concentrations. Detection limits of 20 ppbv for CO2 laser and 50 ppbv for quantum cascade laser were obtained.
Keywords: sulfur hexafluoride; photoacoustic spectroscopy; sensors
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MDPI and ACS Style
Rocha, M.; Sthel, M.; Lima, G.; Silva, M.; Schramm, D.; Miklós, A.; Vargas, H. A Sulfur Hexafluoride Sensor Using Quantum Cascade and CO2 Laser-Based Photoacoustic Spectroscopy. Sensors 2010, 10, 9359-9368.
AMA StyleRocha M, Sthel M, Lima G, Silva M, Schramm D, Miklós A, Vargas H. A Sulfur Hexafluoride Sensor Using Quantum Cascade and CO2 Laser-Based Photoacoustic Spectroscopy. Sensors. 2010; 10(10):9359-9368.
Chicago/Turabian StyleRocha, Mila; Sthel, Marcelo; Lima, Guilherme; Silva, Marcelo da; Schramm, Delson; Miklós, András; Vargas, Helion. 2010. "A Sulfur Hexafluoride Sensor Using Quantum Cascade and CO2 Laser-Based Photoacoustic Spectroscopy." Sensors 10, no. 10: 9359-9368.