129
LEL Range, Resolution & Response Time
LEL
0-100%
1 %
15 sec
LEL Correction Factors
Compound
LEL Relative
Sensitivity*
LEL
CF
Methane
100
1.0
Propane
62
1.6
Propene
67
1.5
n-Butane
50
2.0
Isobutylene
67
1.5
n-Pentane
45
2.2
n-Hexane
43
2.3
Cyclohexane
40
2.5
Benzene
45
2.2
Toluene
38
2.6
n-Heptane
42
2.4
n-Octane
34
2.9
Turpentine
34
2.9
Leaded Gasoline
48
2.1
Methanol
67
1.5
Ethanol
59
1.7
Isopropanol
38
2.6
Acetone
45
2.2
Methyl Ethyl Ketone
38
2.6
Ethyl Acetate
45
2.2
Carbon Monoxide
75
1.2
Hydrogen
91
1.1
Ammonia
125
0.80
* Response of the RAE Systems LEL sensor to a range of gases at the same LEL, expressed as percent of
methane response (=100). These figures are for guidance only and are rounded to the nearest 5%. For the
most accurate measurements, the instrument should be calibrated with the gas under investigation. See
RAE Systems Technical Note TN-156 for more details and other compounds.
Caution:
Refer to RAE Systems Technical Note TN-144 for LEL sensor poisoning.
