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 Hydrogen Chloride (HCl) Calibration Gas – 10 ppm – 60L Cylinder $304.00 Add to cart Chlorine (Cl₂) Calibration Gas – 2 ppm – 60L Cylinder $323.00 Add to cart Phosphine (PH₃) Calibration Gas – 0.5 ppm – 60L Cylinder $304.00 Add to cart Hydrogen Sulfide (H₂S) Calibration Gas – 25 ppm – 60L Cylinder $142.50 Add to cart