Ideal Calibrations

20ppm Hydrogen Sulfide, 200ppm Carbon Monoxide, 50% LEL Methane, 18% VOL Oxygen; balance Nitrogen

25ppm Hydrogen Sulfide, 100ppm Carbon Monoxide, 50% LEL Methane, 17% VOL Oxygen; balance Nitrogen

25ppm Hydrogen Sulfide, 50ppm Carbon Monoxide, 50% LEL Methane, 12.0% VOL Oxygen; balance Nitrogen

20ppm Hydrogen Sulfide, 60ppm Carbon Monoxide, 58% LEL Pentane Simulant, 15% VOL Oxygen; balance Nitrogen