{"id":7354,"date":"2017-03-02T14:38:16","date_gmt":"2017-03-02T13:38:16","guid":{"rendered":"https:\/\/www.ultraflux.net\/en\/?p=7354"},"modified":"2019-05-29T14:15:10","modified_gmt":"2019-05-29T12:15:10","slug":"why-ultraflux-did-choose-the-transit-time-difference-method-2","status":"publish","type":"post","link":"https:\/\/www.ultraflux.net\/en\/why-ultraflux-did-choose-the-transit-time-difference-method-2\/","title":{"rendered":"\u201cTransit time difference method\u201d"},"content":{"rendered":"

Transit time difference method<\/p>\n

Among the different ultrasonic methods used for the measurement of fluid velocity, the method of the” transit time difference ” is the most accurate and the only one which permits to realize a true integration of velocity profile along the acoustic path.
\nAccording to the flow hydraulic conditions and to the required accuracy, one or several chords can be used (a chord is composed of 2 probes)<\/p>\n

There are two successive operations in the flow measurement
\n\u2022 The velocity measurement on one or several chords
\n\u2022 the flow calculation from one or several velocity measurements<\/p>\n

The process advantages
\nThe measurement
\n\u2022 is independant of the sound velocity in the fluid
\n\u2022 is bidirectional
\n\u2022 no provides pressure drop
\nThis measurement principle is applicable to liquids and gas.
\nThe used probes can be intrusive or external (clamp-on).<\/p>\n

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