4-Gas – Hydrogen Sulfide / Carbon Monoxide / Pentane / Oxygen / Nitrogen Calibration Gas Mixtures

Select an option... Hydrogen Sulfide 25 ppm / Carbon Monoxide 100 ppm / Pentane 0.35% (25% LEL) / Oxygen 12% / Nitrogen Hydrogen Sulfide 25 ppm / Carbon Monoxide 100 ppm / Pentane 0.35% (25% LEL) / Oxygen 18% / Nitrogen Hydrogen Sulfide 25 ppm / Carbon Monoxide 100 ppm / Pentane 0.35% (25% LEL) / Oxygen 19% / Nitrogen