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 Propane (C₃H₈) Calibration Gas – 50% LEL (1.05% Vol) – 34L Cylinder $52.25 Add to cart Hydrogen Chloride (HCl) Calibration Gas – 20 ppm – 60L Cylinder $304.00 Add to cart Carbon Monoxide (CO) Calibration Gas – 100 ppm – 103L Cylinder $109.25 Add to cart Nitric Oxide (NO) Calibration Gas – 25 ppm – 60L Cylinder $304.00 Add to cart