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Gas ovens may soon be equipped with a methane detector that sounds an alarm
well before a gas leak reaches explosive levels. The battery-powered sensor was
developed in France by engineers at the Atomic Energy Commission and the
National Institute of Industrial Environment and Risks. It contains a
platinum-coated filament that is heated intermittently to 800 掳C for several
milliseconds. At this temperature platinum catalyses the combustion of methane,
which heats up the filament still further and triggers an alarm.