Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) 60 Liter $189.05 Hydrogen Sulfide (H2S), Carbon Monoxide (CO), Methane (CH4), Oxygen (O2) quantity Add to cart SKU: GFX60-155-1500-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 Propane (C₃H₈) Calibration Gas – 50% LEL (1.1% Vol) – 34L Cylinder $52.25 Add to cart Oxygen (O₂) Calibration Gas – 20.9% – 103L Cylinder $95.00 Add to cart Carbon Dioxide (CO₂) Calibration Gas – 5000 ppm – 103L Cylinder $109.25 Add to cart Sale! Carbon Monoxide (CO) Calibration Gas – 50 ppm & 100 ppm – 103L Cylinder $115.00 Original price was: $115.00.$109.25Current price is: $109.25. Select options This product has multiple variants. The options may be chosen on the product page