ABB SensyMaster FMT400 Thermal mass flowmeter for sale now. ABB SensyMaster FMT400 Thermal mass flowmeter Data General specifications: Measuring media – Air, Nitrogen, Oxygen, Carbon dioxide, Methane, Hydrogen, Natural Gas, Biogas, Helium, Argon, Propane, Ethane, Ethene, Butane, Ammonia, more gas …