A method and apparatus for measuring fluid characteristics use a non-invasive ultrasonic system for generating spatially extended signals into a volume of a fluid and detecting said signals for measuring the characteristic of the fluid. The generated waves are Rayleigh-like surface waves creating, in...http://www.google.fr/patents/US4735097?utm_source=gb-gplus-shareBrevet US4735097 - Method and apparatus for measuring fluid characteristics using surface generated volumetric interrogation signals
Method and apparatus for measuring fluid characteristics using surface ...
