Patent ID: 8217661
Filing Date: 2012-07-10
Classification: G01F

Abstract:
1. An apparatus for ascertaining and/or monitoring at least one process variable, comprising: at least one sensor element; and at least one electronics unit, which, for measuring the process variable, supplies said at least one sensor element with at least one electrical exciter signal, receives from said at least one sensor element at least one electrical measurement signal, and evaluates the measurement signal with respect to the process variable, wherein: the measurement signal is at least dependent on the exciter signal and/or on the process variable and/or on a change of the process variable; at least one analog-digital converter is provided in said at least one electronics unit; said at least one electronics unit is embodied in such a manner, that, for measuring the process variable, said at least one electronics unit supplies said at least one sensor element at least with a first exciter signal and a second exciter signal, timewise one after the other, in such a manner, that the first exciter signal and the second exciter signal have a settable phase relative to one another and the process variable is the fill-level of a medium in a container.