# Gas Correction Factors Gas correction factor tables are are only reproduced for the convenience of the user and do not imply that use with other gases will be safe with BA ion gauges. Divide sensitivity by 100 for Pa-1; multiply by 1.33 for Torr-1.
Gas Symbol Gas Correction Factor NGC Sensitivity S, mBar-1
Acetone (CH3)2CO 3.6 68
Air --- 1.0 19
Ammonia NH3 1.3 25
Argon Ar 1.3 24
Benzene C6H6 5.9 112
Bromine Br 3.8 72
Bromomethane CH3Br 3.7 70
Cadmium Cd 2.3 44
Carbon Dioxide CO2 1.4 27
Carbon Disulfide CS2 5.0 95
Carbon Monoxide CO 1.05 20
Carbon Tetrachloride CCl4 6.0 114
Cesium Cs 4.3 82
Chlorine CI2 0.68 13
Chlorobenzene C6H5CI 7.0 133
Chloroethane C2H5CI 4.0 76
Chloroform CHCI3 4.7 89
Chloromethane CH3CI 2.6 49
Cyanogen (CN)2 2.8 53
Cyclohexylene C6H12 7.9 150
Deuterium D2 0.35 7
Dichlorodifloromethane CCI2F2 2.7 51
Dichloromethane CH2CI2 3.7 70
Ethane C2H6 2.6 49
Ethanol C2H5OH 3.6 68
Ethyl Acetate CH3COOC2H5 5.0 95
Ethyl ether (C2H5)2O 5.1 97
Ethylene C2H4 2.3 44
Ethylene oxide (CH2)2O 2.5 47
Helium He 0.18 3
Heptane C7H16 8.6 163
Hexane C6H14 6.6 125
Hydrogen H2 0.46 9
Hydrogen Bromide HBr 2.0 38
Hydrogen Chloride HCl 1.5 28
Hydrogen Cyanide HCN 1.5 28
Hydrogen Fluoride HF 1.4 27
Hydrogen Iodide HI 3.1 59
Hydrogen Sulfide H2S 2.2 42
Iodine I2 5.4 103
Iodomethane CH3I 4.2 80
Isoamyl Alcohol C5H11OH 2.9 55
Isobutylene C4H8 3.6 68
Krypton Kr 1.9 36
Lithium Li 1.9 36
Mercury Hg 3.6 68
Methane CH4 1.4 27
Methanol CH3OH 1.8 34
Methtyl Acetate CH3COOCH3 4.0 76
Mythyl ether (CH3)2O 3.0 57
Naphthalene C10H8 9.7 184
Neon Ne 0.3 6
Nitrobenzene C6H5NO2 7.2 137
Nitric Oxide NO 1.3 25
Nitrogen N2 1.0 19
Nitrogen Oxide NO2 1.2 23
Nitrous Oxide N2O 1.5 28
Oxygen O2 1.0 19
Phosphine PH3 2.6 49
Potassium K 3.6 68
Propane C3H8 4.2 80
Rubidium Rb 4.3 82
Sodium Na 3.0 57
Sulphur Dioxide SO2 2.1 40
Sulphur Hexafluoride SF6 2.3 44
Toluene C6H5CH3 6.8 129
Water H2O 1.1 21
Xenon Xe 2.9 55