Ultrasonic flow measuring devices and methods of use thereof

A to allow the disposable conduit portion fixing the ultrasonic transceiver, to ensure measurement accuracy by the correction data stored in the storage medium. A piezoelectric element 2a, 2b to allow the disposable was a pipe section 1 fixed to, the measurement circuit part of the non-disposable portion during flow measurement, calibration for pipeline unit 1 stored in the storage memory chip 10 of the disposable portion using the correction data obtained, the piezoelectric elements 2a, performs alternating transmission and reception of the ultrasonic beam by 2b, the measurement accuracy is ensured by correcting the flow rate values ​​obtained by the measurement circuit section. .Field