Methods for monitoring a fluid composition include placing a mechanical resonator in the fluid composition and oscillating the resonator. The resonator can be a tuning fork resonator having tines oscillated in opposite directions and in opposite phases. A variable frequency input signal can be varied...http://www.google.fr/patents/US7334452?utm_source=gb-gplus-shareBrevet US7334452 - Method for characterizing materials by using a mechanical resonator
Method for characterizing materials by using a mechanical resonator
