ULTRASONIC FLOW TUBE

Disclosed is an ultrasonic flow tube comprising: a flow chamber for accepting an inflow of a gas, comprising a center pipe and a plurality of outer pipes surrounding the center pipe, connected between an inlet wall and an outlet wall of the flow chamber such that a velocity of the gas within the center pipe and the plurality of outer pipes is numerically same; and a first transducer attached near the inlet wall and a second transducer attached near the outlet wall, wherein a first acoustic wave package generated by the first transducer and a second acoustic wave package generated by the second transducer is transmitted into the flow chamber such that the center pipe receives a majority of the first and the second acoustic wave package, and the plurality of outer pipes receives a minority of the first acoustic wave package and the second acoustic wave package.