A car-borne highly sensitive near-IR diode-laser methane detector

Journal Article · Sun Aug 31 00:00:00 EDT 2003 · Quantum Electronics (Woodbury, N.Y.)

DOI:https://doi.org/10.1070/QE2003V033N08ABEH002485· OSTI ID:21470371

Berezin, A G; Ershov, Oleg V; Shapovalov, Yu P ^[1]

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1. Natural Science Center, A.M. Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow (Russian Federation)

A highly sensitive automated car-borne detector for measuring methane concentration in real time is designed, developed and tested under laboratory and field conditions. Measurements were made with the help of an uncooled tunable near-IR 1.65-{mu}m laser diode. The detector consists of a multipass optical cell with a 45-m long optical path and a base length of 0.5 m. The car-borne detector is intended for monitoring the methane concentration in air from the moving car to reveal the leakage of domestic gas. The sensitivity limit (standard deviation) under field conditions is 1 ppm (20 ppb under laboratory conditions) for a measuring time of 0.4 s. The measuring technique based on the detection of a single methane line ensured a high selectivity of methane detector relative to other gases. The methane detector can be easily modified for measuring other simple-molecule gases (e.g., CO, CO{sub 2}, HF, NO{sub 2}, H{sub 2}O) by replacing the diode laser and varying the parameters of the control program. (special issue devoted to the memory of academician a m prokhorov)

• OSTI ID: 21470371
• Journal Information: Quantum Electronics (Woodbury, N.Y.), Vol. 33, Issue 8; Other Information: DOI: 10.1070/QE2003v033n08ABEH002485; ISSN 1063-7818
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR
AIR POLLUTION MONITORING
AUTOMOBILES
CARBON DIOXIDE
CARBON MONOXIDE
DETECTION
HYDROFLUORIC ACID
LASERS
METHANE
MOLECULES
NEAR INFRARED RADIATION
NITROGEN DIOXIDE
SENSITIVITY
WATER
ALKANES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
ELECTROMAGNETIC RADIATION
FLUIDS
FLUORINE COMPOUNDS
GASES
HALOGEN COMPOUNDS
HYDROCARBONS
HYDROGEN COMPOUNDS
INFRARED RADIATION
INORGANIC ACIDS
INORGANIC COMPOUNDS
MONITORING
NITROGEN COMPOUNDS
NITROGEN OXIDES
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
RADIATIONS
VEHICLES