Patent ID: 8880363

Claim:
An apparatus for measuring the mass fractions of water and oil in a flowing mixture of oil and water through a pipe comprising: a sensor portion that measures sound velocity and temperature of the flowing oil water mixture at a first time and at a second time, the sensor portion includes a first sensor portion that measures the sound velocity and temperature of the flowing oil water mixture upstream of the temperature changer, and a second sensor portion that measures the sound velocity and temperature of the flowing mixture downstream of the temperature changer; and a temperature changer in thermal communication with the flowing fluid which changes the temperature of the flowing oil water mixture by a measurable amount between the first time and the second time, the first sensor portion includes a sound velocity transducer and a reflecting plug, the sound velocity C of the mixture determined from the transit time t of a pulse of ultrasound from the transducer that travels to the reflecting plug of the sensor and back along axial flow with the flowing fluid to the transducer.