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    Gas Select gas list

    Gas Select™ gas list for Alicat mass flow meters and controllers

    Most Alicat gas mass flow meters and controllers come with Gas Select, an onboard library with 98-130 gases. Any of the pre-loaded gases may also be used to generate and store up to 20 mixed gas calibrations using Composer. Users may switch between selected gases on the fly without any need for recalibration.

    Below is the complete list of preloaded gases and their properties, including absolute viscosity, density, and compressibility at both 25°C and 0°C.

    Pre-loaded gases and properties (PDF)
    • Acetylene (C2H2)
    • Air
    • Argon (Ar)
    • i-Butane (i-C4H10)
    • n-Butane (n-C4H10)
    • Carbon dioxide (CO2)
    • Carbon monoxide (CO)
    • Deuterium (D2)
    • Ethane (C2H6)
    • Ethylene/Ethene (C2H4)
    • Helium (He)
    • Hydrogen (H2)
    • Krypton (Kr)
    • Methane (CH4)
    • Neon (Ne)
    • Nitrogen (N2)
    • Nitrous oxide (N2O)
    • Oxygen (O2)
    • Propane (C3H8)
    • Sulfur hexafluoride (SF6)
    • Xenon (Xe)
    • 5% CH4 + 95% CO2
    • 10% CH4 + 90% CO2
    • 15% CH4 + 85% CO2
    • 20% CH4 + 80% CO2
    • 25% CH4 + 75% CO2
    • 30% CH4 + 70% CO2
    • 35% CH4 + 65% CO2
    • 40% CH4 + 60% CO2
    • 45% CH4 + 55% CO2
    • 50% CH4 + 50% CO2
    • 55% CH4 + 45% CO2
    • 60% CH4 + 40% CO2
    • 65% CH4 + 35% CO2
    • 70% CH4 + 30% CO2
    • 75% CH4 + 25% CO2
    • 80% CH4 + 20% CO2
    • 85% CH4 + 15% CO2
    • 90% CH4 + 10% CO2
    • 95% CH4 + 5% CO2
    • EAN-32 (32% O2 + 68% N2)
    • EAN-36 (36% O2 + 64% N2)
    • EAN-40 (40% O2 + 60% N2)
    • EA-40 (40% O2 + 60% Air)
    • EA-60 (60% O2 + 40% Air)
    • EA-80 (80% O2 + 20% Air)
    • Heliox-20 (20% O2 + 80% He)
    • Heliox-21 (21% O2 + 79% He)
    • Heliox-30 (30% O2 + 70% He)
    • Heliox-40 (40% O2 + 60% He)
    • Heliox-50 (50% O2 + 50% He)
    • Heliox-60 (60% O2 + 40% He)
    • Heliox-80 (80% O2 + 20% He)
    • Heliox-99 (99% O2 + 1% He)
    • Metabolic exhalant (16% O2 + 78.04% N2 + 5% CO2 + 0.96% Ar)
    • P-5 (5% CH4 + 95% Ar)
    • P-10 (10% CH4 + 90% Ar)
    • Coal gas (50% H2 + 35% CH4 + 10% CO + 5% C2H4)
    • Endothermic gas (75% H2 + 25% N2)
    • HHO (66.67% H2 + 33.33% O2)
    • LPG HD-5 (96.1% C3H8 + 1.5% C2H6 + 0.4% C3H6 + 1.9% n-C4H10)
    • LPG HD-10 (85% C3H8 + 10% C3H6 + 5% n-C4H10)
    • Nat gas 1 (93% CH4 + 3% C2H6 + 1% C3H8 + 2% N2 + 1% CO2)
    • Nat gas 2 (95% CH4 + 3% C2H6 + 1% N2 + 1% CO2)
    • Nat gas 3 (95.2% CH4 + 2.5% C2H6 + 0.2% C3H8 + 0.1% C4H10 + 1.3% N2 + 0.7% CO2)
    • Syn gas 1 (40% H2 + 29% CO + 20% CO2 + 11% CH4)
    • Syn gas 2 (64% H2 + 28% CO + 1% CO2 + 7% CH4)
    • Syn gas 3 (70% H2 + 4% CO + 25% CO2 + 1% CH4)
    • Syn gas 4 (83% H2 + 14% CO + 3% CH4)
    • 4.5% CO2 + 13.5% N2 + 82% He
    • 6% CO2 + 14% N2 + 80% He
    • 7% CO2 + 14% N2 + 79% He
    • 9% CO2 +15% N2 + 76% He
    • 9.4% CO2 + 19.25% N2 + 71.35% He
    • 9% Ne + 91% He
    • 89% O2 + 7% N2 + 4% Ar
    • 93% O2 + 3% N2 + 4% Ar
    • 95% O2 + 1% N2 + 4% Ar
    • 2.5% O2 + 10.8% CO2 + 85.7% N2 + 1% Ar
    • 2.9% O2 + 14% CO2 + 82.1% N2 + 1% Ar
    • 3.7% O2 + 15% CO2 + 80.3% N2 + 1% Ar
    • 7% O2 + 12% CO2 + 80% N2 + 1% Ar
    • 10% O2 + 9.5% CO2 + 79.5% N2 + 1% Ar
    • 13% O2 + 7% CO2 + 79% N2 + 1% Ar
    • C-2 (2% CO2 + 98% Ar)
    • C-8 (8% CO2 + 92% Ar)
    • C-10 (10% CO2 + 90% Ar)
    • C-15 (15% CO2 + 85% Ar)
    • C-20 (20% CO2 + 80% Ar)
    • C-25 (25% CO2 + 75% Ar)
    • C-50 (50% CO2 + 50% Ar)
    • C-75 (75% CO2 + 25% Ar)
    • He-25 (25% He + 75% Ar)
    • He-50 (50% He + 50% Ar)
    • He-75 (75% He + 25% Ar)
    • He-90 (90% He + 10% Ar)
    • A1025 (90% He + 7.5% Ar + 2.5% CO2)
    • Stargon CS (90% Ar + 8% CO2 + 2% O2)

    *These gases require S-Series instruments (MS/MCS/PS/PCS).

    • Ammonia (NH3)
    • Butylene (1-Butene)
    • Cis-Butene (cis-2-Butene)
    • Iso-Butene
    • Trans-Butene
    • Carbonyl sulfide (COS)
    • Chlorine (Cl2)
    • Dimethylether (CH3OCH3)
    • Hydrogen sulfide (H2S)
    • Nitrogen trifluoride (NF3)
    • Nitric oxide (NO)
    • Propylene (C3H6)
    • Silane (SiH4)
    • Sulfur dioxide (SO2)

    *These gases require S-Series instruments (MS/MCS/PS/PCS).

    • R-11 Trichlorofluoromethane (CCl3F)
    • R-14 Tetrafluoromethane (CF4)
    • R-22 Difluoromonochloromethane (CHClF2)
    • R-23 Trifluoromethane (CHF3)
    • R-32 Difluoromethane (CH2F2)
    • R-115 Chloropentafluoroethane (C2ClF5)
    • R-116 Hexafluoroethane (C2F6)
    • R-124 Chlorotetrafluoroethane (C2HClF4)
    • R-125 Pentafluoroethane (C2HF5)
    • R-134A Tetrafluoroethane (CH2FCF3)
    • R-142B Chlorodifluoroethane (CH3CClF2)
    • R-143A Trifluoroethane (C2H3F3)
    • R-152A Difluoroethane (C2H4F2)
    • RC-318 Octafluorocyclobutane (C4F8)
    • R-404A (44% R-125 + 4% R-134A + 52% R-143A)
    • R-407C (22% R-32 + 25% R-125 + 52% R-134A)
    • R-410A (50% R-32 + 50% R-125)
    • R-507A (50% R-125 + 50% R-143A)