A process fluid flow measurement device includes a fluid flow member
having an inlet with a first diameter and a throat with a second diameter
that is smaller than the first diameter. A first process fluid pressure
tap is disposed proximate the inlet and a second process fluid pressure
tap is disposed proximate the throat. A differential pressure sensor is
operably coupled to the first and second process fluid pressure taps.
Differential pressure measurement circuitry is coupled to the
differential pressure sensor to provide a differential pressure signal
related to a difference in pressure between process fluid pressure at the
first and second taps. A process fluid velocity measurement device is
positioned in the throat to measure a velocity of process fluid flowing
therethrough and provide a fluid velocity indication. The differential
pressure sensor signal and the fluid velocity indication are used to
provide a calculated indication of fluid flow. This calculated indication
can be relative to multiphasic fluids such as two-phase or three-phase
fluids.