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: GFX120-155-1500-I Category: Gas Cylinders Description Description Hydrogen Sulfide 25 ppm/ Carbon Monoxide 50 ppm/ Methane 2.5% (50% LEL)/ Oxygen 12.0%/ N2 Related products Carbon Dioxide (CO₂) Calibration Gas – 5000 ppm – 103L Cylinder $109.25 Add to cart Phosphine (PH₃) Calibration Gas – 0.5 ppm – 60L Cylinder $304.00 Add to cart Hydrogen Chloride (HCl) Calibration Gas – 20 ppm – 60L Cylinder $304.00 Add to cart Nitric Oxide (NO) Calibration Gas – 25 ppm – 60L Cylinder $304.00 Add to cart