Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) 34 Liter $147.25 Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX34-155-5300-I Category: Gas Cylinders Description Description H2S 25 ppm/ CO 100 ppm/ CH4 2.5% (50% LEL)/ O2 18.0%/ N2 Related products Hydrogen Chloride (HCl) Calibration Gas – 20 ppm – 60L Cylinder $304.00 Add to cart Silane (SiH₄) Calibration Gas – 20 ppm – 60L Cylinder $304.00 Add to cart Hydrogen Chloride (HCl) Calibration Gas – 5 ppm – 60L Cylinder $304.00 Add to cart Hydrogen (H₂) Calibration Gas – 50% LEL – 103L Cylinder $95.00 Add to cart