SACOR BUSINESS GROUP-2019 COMPANY CATALOGUE SACOR BUSINESS GROUP 2019 COMPANY CATALOGUE | Page 109

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refereNce
lIBrary
■ lel cOrrelatION factOrs
The following chart outlines LEL correlation factors for combustible gas sensors.
calIBratION Gas
LEL
(% vol) Butane Hexane *
Hydrogen *
methane *
Pentane *
Propane
acetone 2.5% 1.00 0.70 1.70 1.70 0.90 1.10
acetylene 2.5% 0.70 0.60 1.30 1.30 0.70 0.80
Benzene 1.2% 1.10 0.80 1.90 1.90 1.00 1.20
Butane 1.9% 1.00 0.58 1.78 1.67 0.83 1.03
ethane 3.0% 0.80 0.60 1.30 1.30 0.70 0.80
ethanol 3.3% 0.89 0.52 1.59 1.49 0.74 0.92
ethylene 2.7% 0.80 0.60 1.40 1.30 0.70 0.90
Hexane 1.1% 1.71 1.00 3.04 2.86 1.42 1.77
Hydrogen 4.0% 0.56 0.33 1.00 0.94 0.47 0.58
Isopropanol 2.0% 1.10 0.90 2.00 1.90 1.00 1.20
methane 5.0% 0.60 0.35 1.06 1.00 0.50 0.62
methanol 6.0% 0.60 0.50 1.10 1.10 0.60 0.70
Nonane 0.8% 2.22 1.30 3.95 3.71 1.84 2.29
Pentane 1.4% 1.21 0.71 2.15 2.02 1.00 1.25
Propane 2.1% 0.97 0.57 1.72 1.62 0.80 1.00
styrene 0.9% 1.30 1.00 2.20 2.20 1.10 1.40
toluene 1.1% 1.53 0.89 2.71 2.55 1.26 1.57
Xylene 1.1% 1.50 1.10 2.60 2.50 1.30 1.60
JP-4 — — — — — 1.20 —
JP-5 — — — — — 0.90 —
JP-8 — — — — — 1.50 —
NOte: The table above provides the LEL for select combustible gases*. It also provides correlation factors that help the safety technician and instrument
operator determine the actual percentage LEL when the sample gas differs from the gas that was used to calibrate the unit.
For example, if the unit reads 10% LEL in a pentane atmosphere, and was calibrated to methane, the actual percentage LEL is determined as follows:
1. Locate the table cell where the sample gas (pentane) intersects with the calibration gas (methane).
* The combustible gas list is not a comprehensive list of all combustible gases that can be detected by the MX6. For additional information about combustible
gas detection and the MX6, contact the ISC Technical Service department (see the manual section, Contact Information).