Gas List

Compound Symbol Density Air=1 Operating Range Standard Range A1 A2
Oxygen O2 1.105 0~25% Vol. 0~25% Vol. 19% 17%
Carbon Monoxide CO 0.967 0~2000ppm 0~250ppm 30ppm 200ppm
Hydrogen Sulphide H2S 1.188 0~500ppm 0~50ppm 5ppm 10ppm
Sulphur Dioxide SO2 2.263 0~500ppm 0~10ppm 2ppm 5ppm
Nitrogen Oxide NO 1.036 0~1500ppm 100ppm 25ppm 35ppm
Nitrogen Dioxide NO2 2.62 0~200ppm 0~10ppm 3ppm 10ppm
Chlorine Cl2 2.473 0~250ppm 0~10ppm 0.5ppm 1ppm
Hydrogen H2 0.069 0~2000ppm 0-2000ppm 250ppm 500ppm
Hydrogen Cyanide HCN 0.94 0~100ppm 25ppm 5ppm 10ppm
Hydrogen Chloride HCl 1.26 0~200ppm 10ppm 2ppm 5ppm
Ammonia NH3 0.59 0~200ppm 100ppm 25ppm 35ppm
Ozone O 3 1.66 0~5ppm 2ppm 0.1ppm 0.3ppm
Ethylene Oxide C2H4O 1.49 0~100ppm 25ppm 5ppm 10ppm
Phosphine PH3 1.184 0~20ppm 1ppm 0.2ppm 0.3ppm
Carbon Dioxide CO2   0~2% 0~2% 0.50% 1.50%