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- W2182474967 abstract "Tokyo Gas Co., Ltd. and Anritsu Corporation jointly developed a new version of a portable remote methane detector. Using this detector, the operator can easily check a gas leak from a distance by hand-scanning the laser beam. To the best of the author's knowledge, an old version of the detector released in 2001 was world's first handheld device providing remote detection of methane leaks. In the present work, the author and his research group improved the user-friendliness and cost-effectiveness dramatically from the old version. Tokyo Gas Engineering (TGE) Co., Ltd. has introduced the new version (LASERMETHANE TM : SA3C05A) into the international market since February 2004. This product is getting more and more popular in the gas industry, and its sales volume exceeds 100 as early as July 2004. The portable remote methane detector transmits a laser beam to a target such as a gas pipe, subsequently receiving a fraction of backscatter deflected from the target. It thereby measures the concentration-length product of methane between the detector and target. To perform highly sensitive infrared absorption measurement, the device employs the second-harmonic detection of wavelength modulation spectroscopy using a near-infrared tunable diode laser (InGaAsP DFB laser) with a wavelength for 2ν3-band R(3) line of methane (λ = 1.6537 µm). The device has a minimum detectable of 100 ppm-m and the detection distance with most diffusive reflection targets are up to 10 meters. In this case, the device can detect and pinpoint a 10 ml-min -1 gas leak from an indoor exposed pipe from a distance. The detection distances can be extended up to 30 meters if the operator allows a minimum detectable of 1000 ppm-m. In addition when used with a retro reflector, the device extends the maximum distance up to 150 meters." @default.
- W2182474967 created "2016-06-24" @default.
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- W2182474967 date "2004-01-01" @default.
- W2182474967 modified "2023-09-26" @default.
- W2182474967 title "LASERMETHANE TM — A Portable Remote Methane Detector" @default.
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