Industrial Scientific 1810-2283 Bump Test Gas: 50% LEL Methane, 15% Oxygen, 100 ppm Carbon Monoxide, 25 ppm Hydrogen Sulfide, Balance Nitrogen
Industrial Scientific 1810-2668 Carbon Monoxide Bump Test Gas - 100 ppm (CO)
Industrial Scientific 1810-5825: 25% LEL Methane, 15% Oxygen, 200 ppm Carbon Monoxide, 75 ppm Hydrogen Sulfide, Balance Nitrogen, 34L