Remote sensing technology for measuring hydrogen gas concentration

This paper described a system designed to measure Raman scattering light with a Fresnel lens refracting telescope and pulsed laser. The aim of the study was to develop a remote sensing technology for measuring hydrogen gas concentrations. During the experiments, hydrogen gas released into the air while Raman scattering signals from atmospheric nitrogen (N2) were measured. Hydrogen gas concentrations were then calculated by determining the signal ratios of the gases. The experiments included a sensitivity analysis used to evaluated gas cells filled with a hydrogen gas mixture. Results of the study showed that hydrogen gases with concentrations of 0.6 vol per cent can be detected at a distance of 13 m.