Unverified90% confidenceDecision RuleTime unknown

家用天然气(甲烷)泄漏检测选催化燃烧式或半导体式，报警阈值应设在25% LEL（约1.25%vol甲烷）以下，此浓度远低于甲烷5%的爆炸下限，可留足逃生和处置时间

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便携式气体检测仪category

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Unverified复合探测器的可燃气体传感器多为催化燃烧式或半导体式，报警阈值应设定在爆炸下限（LEL）的10%~25%，即甲烷约0.5%~1.25%浓度，此时距离危险浓度仍有充足安全余量87% similar

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