RKI Instruments GX-3R User Manual

110 • Appendix B: Gas Select Mode GX-3R Operator’s Manual
Table 15: Lower Explosive Limit ppm Levels
Gas Standard (ppm) IEC (ppm) ISO (ppm)
Methane (CH4) 50,000 44,000 44,000
Isobutane (i-C4H10) 18,000 13,000 15,000
Hydrogen (H2) 40,000 40,000 40,000
Methanol (CH3OH) 55,000 60,000 60,000
Acetylene (C2H2) 15,000 23,000 23,000
Ethylene (C2H4) 27,000 23,000 24,000
Ethane (C2H6) 30,000 24,000 24,000
Ethanol (C2H5OH) 33,000 31,000 31,000
Propylene (C3H6) 20,000 20,000 18,000
Acetone (C3H6O) 21,500 25,000 25,000
Propane (C3H8) 20,000 17,000 17,000
Butadiene (C4H6) 11,000 14,000 14,000
Cyclopentane (C5H10) 14,000 14,000 14,000*
Benzene (C6H6) 12,000 12,000 12,000
N-hexane (n-C6H14) 12,000 10,000 10,000
Toluene (C7H8) 12,000 10,000 10,000
N-heptane (n-C7H16) 11,000 8,500 8,000
Xylene (C8H10) 10,000 10,000 10,000*
N-nonane (n-C9H20) 7,000 7,000 7,000
Ethyl acetate (EtAc) 21,000 20,000 20,000
Isopropyl alcohol (IPA) 20,000 20,000 20,000*
Methyl ethyl ketone (MEK) 18,000 15,000 15,000
Methyl methacrylate (MMA) 17,000 17,000 17,000*
Dimethyl ether (DME) 30,000 27,000 27,000
Methyl isobutyl ketone (MIBK) 12,000 12,000 12,000*
Tetrahydrofuran (THK) 20,000 15,000 15,000*
* Values are actually IEC because no ISO definition exists for these gases.

RKI Instruments GX-3R Specifications

General

Brand	RKI Instruments
Model	GX-3R
Category	Measuring Instruments
Language	English