Instruction manual
Model 5100-02-IT Combustible Gas Sensor Module
Page: 35
7.9 APPENDIX I: COMBUSTIBLE GAS SCALING FACTORS
For combustible gas monitoring, a calibration standard of Methane may be used in conjunction with scaling
factors to cause Sentry concentration display and alarm function in %LEL scale of another gas as follows:
GAS METHANE
FACTOR
Acetaldehyde 60
Acetic Acid 54
Acetic Anhydride 46
Acetone 52
Acetylene 57
Alkyl Alcohol 51
Ammonia 126
n-Amyl Alcohol 33
Aniline 39
Benzene 41
Biphenyl 25
1,3-Butadiene 56
n-Butane 58
iso-Butane 52
Butene-1 45
cis-Butene-2 48
trans-Butene-2 51
n-Butyl Alcohol 34
iso-Butyl Alcohol 53
tert-Butyl-Alcohol 74
n-Butyl Benzene 31
iso-Butyl Benzene 32
n-Butyric Acid 38
Carbon Disulfide 18
Carbon Monoxide 75
Carbon Oxysulphide 93
Chlorobenzene 34
Cyanogen 89
Cyclohexane 41
Cyclopropane 62
n-Decane 33
Diethylamine 49
Dimethylamine 58
2,3-Dimethylpentane 40
2,3-Dimethylpropane 40
Dimethylsulphide 43
1,4-Dioxane 45
Epichlorohydrin 45
Ethane 68
Ethyl Acetate 51
Ethyl Alcohol 73
Ethylamine 53
Ethyl Benzene 36
Ethyl Bromide 91
Ethyl Chloride 57
Ethylcyclopentane 40
Ethylene 71
Ethylenedichloride 66
Ethyleneoxide 52
GAS METHANE
FACTOR
Diethyl Ether 46
Dimethoxyethane 42
Dimethyl Ether 63
Dimethylformamide 46
Ethyl Formate 44
Ethylmercaptan 56
n-Heptane 39
n-Hexane 37
Hydrazine 45
Hydrogencyanide 48
Hydrogen 77
Hydrogen Sulfide 41
Methane 100
Methyl Actetate 50
Methyl Alcohol 86
Methylamine 77
Methyl Bromide 90
Methyl Chloride 102
Methylcyclohexane 44
Methylenedichloride 93
Methylethylether 44
Methylethylketone 41
Methyl Formate 67
Methylmercaptan 61
Methylpropionate 51
Methyl n-propylketone 40
Napthalene 34
Nitromethane 34
n-Nonane 31
n-Octane 37
n-Pentane 46
i-Pentane 46
Propane 55
n-Propyl Alcohol 47
n-Propylamine 48
n-Propylchloride 50
Propylene 52
Propyleneoxide 46
iso-Propylether 44
Propyne 42
Toluene 40
Triethylamine 40
Trimethylamine 48
Vinylethylether 42
o-Xylene 36
m-Xylene 39
p-Xylene 39
JP-4 (Jet Fuel) 41
NOTES:
1. Scaling factors are not FMRC approved.
2. Base data source: EEV sensor specification catalog. (EEV claims some data is the result of specific
tests, other data is empirically derived).