pp. 365-375
S&M816 Research Paper of Special Issue https://doi.org/10.18494/SAM.2010.678 Published: October 14, 2010 Practical and Sensitive Measurement of Methane Gas Concentration Using a 1.6 µm Vertical-Cavity-Surface-Emitting-Laser Diode [PDF] Seiichi Kakuma and Kazutoshi Noda (Received February 15, 2010; Accepted April 27, 2010) Keywords: methane, concentration measurement, infrared absorption, laser diode
Methane (CH4)-based natural gas is increasingly being used as city gas. Since CH4 gas is explosive, accurate and sensitive CH4 gas concentration sensors are required. We have developed practical and sensitive equipment for measuring the methane gas concentration based on infrared (IR) absorption by sweeping light with a 1.6 µm wavelength emitted from a vertical-cavity-surface-emitting-laser diode (VCSEL). This method can be used to measure the CH4 concentration with a resolution better than 0.1% and is unaffected by the wavelength drift of the light source.
Corresponding author: Seiichi KakumaCite this article Seiichi Kakuma and Kazutoshi Noda, Practical and Sensitive Measurement of Methane Gas Concentration Using a 1.6 µm Vertical-Cavity-Surface-Emitting-Laser Diode, Sens. Mater., Vol. 22, No. 7, 2010, p. 365-375. |