with :
Ø = internal diameter of the pipe
Kh = hydraulic coefficient depending on the number of Reynolds, on the viscosity of the fluid and roughness of the pipe walls
Vi = measurement of speed on the i chord
Wi = the weighting factor
The weighting Wi permits the integration of the profile and depends on the number of chords and of their position. This technology permits to improve the accuracy by a better knowledge of the velocity profile.
