▎ 摘　　要

NOVELTY - The gas sensor (10) has a gas passage structure (12) that is arranged between a cavity (11) and an exterior and comprised of a selectively gas permeable element (12A). The cavity is hermetically sealed except for the gas passage structure. The sensor elements (13) are configured to detect the presence of one or more gases in the cavity. The selectively gas-permeable element is comprised of material which is one or more of a group consisting of graphene, a metal, a metal thin film, palladium (Pd), nickel (Ni), titanium (Ti), polytetrafluoroethylene (PTFE), and poly methyl methacrylate (PMMA). The selectively gas permeable element is selective for the permeation of hydrogen. The gas passage structure is comprised of a support structure (12B) to which the selectively gas-permeable element is connected. USE - Gas sensor mounted on inlet port and an outlet port of passenger compartment of motor vehicle powered by fuel cell, for leak detection of hydrogen (all claimed). ADVANTAGE - The presence of hydrogen outside the hydrogen storage, fuel cell, and discharge lines is safely and reliably detected. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the gas sensor. (Drawing includes non-English language text) 10Gas sensor 11Cavity 12Gas passage structure 12ASelectively gas permeable element 12BSupport structure 13Sensor element