Unit conversion between ppm and volume percentage
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This post was last edited by slll611 on 2016-5-14 at 18:51. 1. The conversion relationship between ppm and volume percentage; for example, what is the lower explosion limit for benzene, 1.2%? 2. The alarm threshold set for portable flammable/toxic gas detectors (is it 25%?) ) What are the standards to be followed?
1ppm=0.00001
1% = 10,000 ppm, 1 ppm = 0.0001%.
PPM means one part per million. Combustible gas detection instruments adjust the alarm threshold based on the type of gas being detected and its lower explosion limit
Dear user: The explosion limit of gases or vapors is expressed as a percentage (%) of the volume occupied by the flammable substance in the mixture, while the explosion limit of combustible dusts is expressed as a mass ratio of g/m^3 of the flammable substance in the mixture. ppm is a mass unit that represents 0.000001 kg. The explosion limits for gases and vapors, as well as the conversion to ppm, can be determined using density; dust levels can be calculated directly.