Patent ID: 8342018

Claim:
A high accuracy battery-operated MEMS mass flow meter comprising: a MEMS mass flow sensor mounted on an ultra thin printed circuit board which is within a thickness less than 0.5 mm and the printed circuiy board is inserted into a as flow channel with its surface placed in parallel to the fluid flow direction; wherein said ultra thin printed circuit board can force fluid redistributing, from ultra thin printed circuit board's edge into a laminar flow according to fluidic boundary layer theory; wherein said fluid redistributing can provide measuring flow medium variability by applying conversion factors to different flow medium based on a calibration of single flow medium, a meter head with a 180° rotation freedom, which has a LCD display that can exhibit an instant mass flow rate, an accumulated flow volume, and flow medium temperature; and a gas flow channel with two Venturi nozzle structures are established respectively on its inlet and outlet ends to reduce the flow turbulence.