Patent ID: 8364426

Claim:
A flow device, comprising: at least one conduit ( 20 ); a pick-off ( 30 ) providing a pick-off signal ( 35 ) for measuring motion of the at least one conduit ( 20 ); a drive ( 40 ) that receives a first signal ( 55 ) for vibrating the at least one conduit ( 20 ) at a resonance frequency and that receives a second signal ( 56 ) for vibrating the at least one conduit at a frequency that is different than the resonance frequency; and one or more electronics ( 50 ) that generate the first and second signals ( 55 , 56 ), receive the pick-off signal ( 35 ) from the pick-off ( 30 ), and measure changes in a time shift between the second signal ( 56 ) frequency applied by the drive ( 40 ) and the second signal ( 56 ) frequency detected by the pick-off ( 30 ).