Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) 34 Liter $151.05 Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX34-140-2500-I Category: Gas Cylinders Description Description Hydrogen Sulfide 10 ppm/ Carbon Monoxide 50 ppm/ Methane 2.5% (50% LEL)/ Oxygen 18.0%/ N2 Related products Methane (CH₄) Calibration Gas – 50% LEL – 103L Cylinder $95.00 Add to cart Oxygen (O₂) Calibration Gas – 20.9% – 103L Cylinder $95.00 Add to cart Hydrogen (H₂) Calibration Gas – 50% LEL – 103L Cylinder $95.00 Add to cart Carbon Monoxide (CO) Calibration Gas – 50 ppm – 103L Cylinder $109.25 Add to cart