Patent ID: 7886602
Filing Date: 2011-02-15
Classification: G01F,G01N

Abstract:
1. An apparatus for determining and/or monitoring the fill level, density and/or viscosity of a medium in a container, comprising: at least one oscillatable unit which produces, and/or receives, mechanical oscillations; at least one tuning unit whose stiffness is variable and which is embodied in such a manner and connected in such a manner with said oscillatable unit, or is a component of said oscillatable unit in such a manner, that at least the resonance frequency of said oscillatable unit is changeable via said at least one tuning unit; and at least one inner oscillatory rod and an outer oscillatory rod provided in said oscillatable unit, wherein: said outer oscillatory rod surrounds said inner oscillatory rod coaxially; said outer oscillatory rod and said inner oscillatory rod are coupled together; and said at least one tuning unit is coupled at least with one of said oscillatory rods.