... xylene, TVOC,NMTHC)2. Natgas, Artificial Gas, Coal-Mine Gas, LPG, Mixed Gas, High Purity Gas (Ar,He,O2,N2,CO2)3. Food ... (methanol, ethanol, ethyl acetate, ethyl butyrate, acetaldehyde)5. Dissolved Gas (hydrogen, methane, ethane, ethylene, acetylene, carbon monoxide, carbon dioxide ... be installed hydrogen and air flow in different carrier gas, these separate ways can be adjusted independently.4. ...