Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) 120 Liter $308.75 Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX120-155-5300-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 – 10 ppm – 60L Cylinder $304.00 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 Propane (C₃H₈) Calibration Gas – 50% LEL (1.1% Vol) – 34L Cylinder $52.25 Add to cart Hydrogen Sulfide (H₂S) Calibration Gas – 25 ppm – 60L Cylinder $142.50 Add to cart