Oldham iTrans 2, Installation And Operation Manual

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103
Appendix G | LEL Correlation
Factors
The following chart outlines LEL correlation factors for combustible
catalytic gas sensors installed in iTrans2.
Methane Pentane Hydrogen
Acetone 1.80 0.90
Acetylene 1.40 0.70
Ammonia 1.00 0.50
Benzene 2.10 1.05
n-Butane
1.80 0.90
Ethane 1.40 0.70
Ethanol
1.60 0.80
Ethylene 1.40 0.70
n-Hexane
2.85 1.40
Hydrogen 1.00
Isopropanol
1.80 0.90
JP-4 3.00 1.50
JP-5
3.10 1.55
JP-8 3.20 1.60
Methane
1.00
Methanol 1.35 0.65
n-Pentane
2.00 1.00
Propane 1.60 0.80
Styrene 2.40 1.20
Toluene
2.50 1.25
Xylene 2.40 1.20
Example: The instrument has been calibrated on methane and is now
reading 10% LEL in a pentane atmosphere. To find actual %LEL pentane,
please multiply by the number found at the intersection of the methane
column (calibration gas) and the pentane row (gas being sampled)…in this
case, 2.00. Therefore, the actual %LEL pentane is 20% (10x2.00).
Calibration gases available from Industrial Scientific - Oldham.