Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) 34 Liter $118.75 Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX34-155-1500-I Category: Gas Cylinders Description Description Hydrogen Sulfide 25 ppm/ Carbon Monoxide 50 ppm/ Methane 2.5% (50% LEL)/ Oxygen 12.0%/ N2 Related products Methane (CH₄) Calibration Gas – 30% LEL – 34L Steel Cylinder $128.73 Add to cart Hydrogen Cyanide (HCN) Calibration Gas – 10 ppm – 60L Cylinder $232.75 Add to cart Chlorine (Cl₂) Calibration Gas – 2 ppm – 60L Cylinder $323.00 Add to cart Hydrogen Sulfide (H₂S) Calibration Gas – 25 ppm – 60L Cylinder $142.50 Add to cart