$308.75 120 Liter Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX120-150-100-I Category: Gas Cylinders Description Description Hydrogen Sulfide 20 ppm/ Carbon Monoxide 60 ppm/ Methane 1.45% (58% LEL Pentane Equiv.)/ Oxygen 15.0%/ N2 Related products Methane (CH₄) Calibration Gas – 50% LEL – 103L Cylinder $95.00 Add to cart Hydrogen Cyanide (HCN) Calibration Gas – 10 ppm – 60L Cylinder $232.75 Add to cart Methane (CH₄) Calibration Gas – 20% LEL – 103L Cylinder $95.00 Add to cart Carbon Dioxide (CO₂) Calibration Gas – 5000 ppm – 103L Cylinder $109.25 Add to cart