Methane Calibration Gas (CH4)

Select an option... 30% LEL, 1.5% Volume | Balance Air 500 ppm | Balance Air 99.999% Volume 10 ppm | Balance Air 20% LEL, 1% Volume | Balance Air 100 ppm | Balance Air 100 ppm | Balance Nitrogen 20% Volume | Balance Nitrogen 50% LEL, 2.5% Volume | Balance Air 50% LEL, 2.5% Volume | Balance Nitrogen