Patent ID: 6948362

Claim:
A mass flow measuring device comprising: an evaporator having a housing defining a flow path and an outlet for discharging a gas and liquid evaporant mix along the flow path; an inlet plenum communicating with the evaporator for receiving inlet gases, liquids or a mixture of gases and liquids flowing along respective inlet flow paths, an electric heater means for heating the inlet gases, liquids and gas liquid mixtures within the evaporator flow path; electric sensor means connected to the electric heater means for measuring heater energy consumption; temperature sensor means provided in the middle of respective inlet flow paths for directly measuring temperatures of the inlet gases, liquids and mixtures, and temperature sensor means provided centrally in the outlet flow path for directly measuring the temperature of the discharged gas and liquid evaporant mix; such that mass flow is measured based on precise determination of energy absorbed, inlet flow rates, and inlet and outlet temperatures.