Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) 120 Liter $241.30 Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX120-140-2500-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 Propane (C₃H₈) Calibration Gas – 50% LEL (1.05% Vol) – 34L Cylinder $52.25 Add to cart Methane (CH₄) Calibration Gas – 30% LEL – 34L Steel Cylinder $128.73 Add to cart Ammonia (NH₃) Calibration Gas $304.00 Select options This product has multiple variants. The options may be chosen on the product page Carbon Dioxide (CO₂) Calibration Gas – 5000 ppm – 103L Cylinder $109.25 Add to cart