Methane Calibration Gas (CH4)

Select an option... 5 ppm | Balance Air 10 ppm | Balance Air 25 ppm | Balance Air 50 ppm | Balance Air 100 ppm | Balance Air 500 ppm | Balance Air 1,000 ppm | Balance Air 9,900 ppm | Balance Air 0.375% Volume (7.5% LEL) | Balance Air 1% Volume (20% LEL) | Balance Air 1.75% Volume | Balance Air 2.5% Volume (50% LEL) | Balance Air 3% Volume | Balance Air 2.5% Volume (50% LEL)/ Oxygen 17%/ Nitrogen 2.5% Volume (50% LEL)/ Oxygen 18%/ Nitrogen 2.5% Volume (50% LEL)/ Oxygen 19%/ Nitrogen