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 Ammonia (NH₃) Calibration Gas $304.00 Select options This product has multiple variants. The options may be chosen on the product page Methane (CH₄) Calibration Gas – 20% LEL – 103L Cylinder $95.00 Add to cart Methane (CH₄) Calibration Gas – 50% LEL – 103L Cylinder $95.00 Add to cart Hydrogen Chloride (HCl) Calibration Gas – 20 ppm – 60L Cylinder $304.00 Add to cart