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High precision methane gas detection tubes

High precision methane gas detection tubes

2020-3-1Here we report on the broadband detection of nitrous oxide (N 2 O) and methane (CH 4) mixtures in dry nitrogen by using a quartz-enhanced photoacoustic (QEPAS) sensor exploiting an array of 32 distributed-feedback quantum cascade lasers, within a spectral emission range of 1190−1340 cm −1 as the excitation source. Methane detection down to a minimum detection limit of 200 ppb at 10 s lock ...

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