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The invention concerns a method of and apparatus for measuring the flow rate of a continuous phase in a flowing multiphase fluid. It includes the steps of measuring a velocity of the fluid with a thermal anemometer at a location in the flow and simultaneously measuring the passage of a discontinuous

The invention concerns a method of and apparatus for measuring the flow rate of a continuous phase in a flowing multiphase fluid. It includes the steps of measuring a velocity of the fluid with a thermal anemometer at a location in the flow and simultaneously measuring the passage of a discontinuous phase at the same location with a local probe system capable of measuring the passage of a discontinuous phase, and then using the measurement of the discontinuous phase to correct the measurement of the continuous phase so as to derive the flow rate thereof.

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Apparatus for measuring a flow rate of a continuous phase in a flowing multiphase fluid comprising a continuous phase and a discontinuous phase, the apparatus comprising: a) a thermal anemometer positioned at a location in the flowing multiphase fluid and measuring a velocity of the flowing multipha

Apparatus for measuring a flow rate of a continuous phase in a flowing multiphase fluid comprising a continuous phase and a discontinuous phase, the apparatus comprising: a) a thermal anemometer positioned at a location in the flowing multiphase fluid and measuring a velocity of the flowing multiphase fluid; b) a local probe system at said location for measuring the passage of the discontinuous phase; and c) means for using a measurement of the passage of the discontinuous phase from the local probe system to correct the velocity measured by the thermal anemometer and derive the flow rate of the continuous phase.