Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) 120 Liter $308.75 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 Hydrogen Chloride (HCl) Calibration Gas – 20 ppm – 60L Cylinder $304.00 Add to cart Methane (CH₄) Calibration Gas – 20% LEL – 103L Cylinder $95.00 Add to cart Ammonia (NH₃) Calibration Gas – 25 ppm – 60L Cylinder $304.00 Add to cart Methane (CH₄) Calibration Gas – 50% LEL – 103L Cylinder $95.00 Add to cart