Design issues of combustible toxic gas detectors
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According to GBT 50493-2019, to determine whether a leaking gas is heavier than air, the ratio of the molecular weight of the leaking gas to that of ambient air is used as a criterion. For example, the molecular weight of toluene is 92.14, while the molecular weight of air is approximately 29; since 92.14/29 > 1.2, it can be concluded that toluene is heavier than air. Is this the correct way to make such a determination?
It can be judged in this way; furthermore, the physical property data should include the ratio of the gas density to that of air