PortaGas PortaGreen Calibration Gas, 34 Liter, 100 ppm CO, 25 ppm H2S, 18% O2, 50% LEL CH4 Methane (2.5% vol),

34 liter Combination Calibration Gas for the following Industrial Scientific Gas Monitors that are equipped with LEL (Methane), O2, CO, H2S sensors; Ventis MX4, iQuad MX4, M40, MX6, iTX.

Concentration: 100 ppm CO, 25 ppm H2S, 18% O2, 50% LEL Methane (2.5% vol)