2015•Unpublished venueRequires access

Calibration-free Handheld sensor based on Tunable Diode Laser Absorption Spectroscopy for Remote Detection of Methane

Wuwen Ding, Liqun Sun

Abstract

We develop a handheld remote methane sensor based on Tunable Diode Laser Absorption Spectroscopy (TDLAS) in this paper. It is designed as a standoff device for searching for methane leaks from a distance up to 30 m. The ratio of the second-harmonic (2f) and first-harmonic (1f) of the modulation frequency is used to calculate the path-integrated concentration at the 2𝜐3 band of methane located at 1653.7 nm.

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Key concepts: Tunable diode laser absorption spectroscopy, Methane, Materials science, Calibration, Diode, Optoelectronics, Absorption (acoustics), Laser