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 (CH 3 ) 2 CO 3.6 68 Air --- 1.0 19 Ammonia NH 3 1.3 25 Argon Ar 1.3 24 Benzene C 6 H 6 5.9 112 Bromine Br 3.8 72 Bromomethane CH 3 Br 3.7 70 Cadmium Cd 2.3 44 Carbon Dioxide CO 2 1.4 27 Carbon Disulfide CS 2 5.0 95 Carbon Monoxide CO 1.05 20 Carbon Tetrachloride CCl 4 6.0 114 Cesium Cs 4.3 82 Chlorine CI 2 0.68 13 Chlorobenzene C 6 H 5 CI 7.0 133 Chloroethane C 2 H 5 CI 4.0 76 Chloroform CHCI 3 4.7 89 Chloromethane CH 3 CI 2.6 49 Cyanogen (CN) 2 2.8 53 Cyclohexylene C 6 H 12 7.9 150 Deuterium D 2 0.35 7 Dichlorodifloromethane CCI 2 F 2 2.7 51 Dichloromethane CH 2 CI 2 3.7 70 Ethane C 2 H 6 2.6 49 Ethanol C 2 H 5 OH 3.6 68 Ethyl Acetate CH 3 COOC 2 H 5 5.0 95 Ethyl ether (C 2 H 5 ) 2 O 5.1 97 Ethylene C 2 H 4 2.3 44 Ethylene oxide (CH 2 ) 2 O 2.5 47 Helium He 0.18 3 Heptane C 7 H 16 8.6 163 Hexane C 6 H 14 6.6 125 Hydrogen H 2 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 H 2 S 2.2 42 Iodine I 2 5.4 103 Iodomethane CH 3 I 4.2 80 Isoamyl Alcohol C 5 H 11 OH 2.9 55 Isobutylene C 4 H 8 3.6 68 Krypton Kr 1.9 36 Lithium Li 1.9 36 Mercury Hg 3.6 68 Methane CH 4 1.4 27 Methanol CH 3 OH 1.8 34 Methtyl Acetate CH 3 COOCH 3 4.0 76 Mythyl ether (CH 3 ) 2 O 3.0 57 Naphthalene C 10 H 8 9.7 184 Neon Ne 0.3 6 Nitrobenzene C 6 H 5 NO 2 7.2 137 Nitric Oxide NO 1.3 25 Nitrogen N 2 1.0 19 Nitrogen Oxide NO 2 1.2 23 Nitrous Oxide N 2 O 1.5 28 Oxygen O 2 1.0 19 Phosphine PH 3 2.6 49 Potassium K 3.6 68 Propane C 3 H 8 4.2 80 Rubidium Rb 4.3 82 Sodium Na 3.0 57 Sulphur Dioxide SO 2 2.1 40 Sulphur Hexafluoride SF 6 2.3 44 Toluene C 6 H 5 CH 3 6.8 129 Water H 2 O 1.1 21 Xenon Xe 2.9 55