Abstract: A TDR fill level measuring device for measuring the fill level of a medium in a container, having a transmitting unit for transmitting a pulse-shaped electromagnetic measuring signal, a receiving unit for receiving a reflection signal, an evaluation unit for evaluating the reflection signal and a waveguide for guiding the measuring signal and the reflection signal, the waveguide having at least two waveguide sections, each of which has a functional waveguide cross-sectional face, wherein the functional waveguide cross-sectional face corresponds to the cross-sectional face of the waveguide conductor, wherein a reference reflector is present, at least a part of the measuring signal being reflected at least once on the reference reflector during operation. High reliability and a simply design are achieved by the reference reflection being formed by a transition between two waveguide sections having different shapes and/or different sizes of the functional waveguide cross-sectional face.

Abstract: A method for determining the fill level of a process medium arranged in a container using a TDR fill level meter having at least one signal line for guiding an electromagnetic signal, a signal line head and an electronics unit, the signal line extending into the process medium, the method having at least the steps of generating a pulsed transmitter signal with the electronics unit, wherein the transmission signal propagates along the signal line as measuring signal with changing amplitude, detecting and evaluating at least one reflection signal with the electronics unit, wherein the reflection signal is a reflection of the measuring signal on an interface between a first and a second medium having different impedances, the relative permittivity of the second medium is determined at least in dependence on the amplitude of the measuring signal transmitted through the first medium and the amplitude of the reflection signal.

Abstract: A level meter and a method for monitoring the level meter operating according to the radar principle, in which a signal conductor is lead out of an inner space of a leakage chamber of a bracket housing through a process-side opening of the leakage chamber and/or of the bracket housing into the process-side outer space of the bracket housing. The method involves transmitting a signal in the form of a pulse along the signal conductor, receiving a reflected received signal, relaying the received signal to the control and evaluation unit. In addition to the simple verification of the presence of a leak, a change in the received signal can also be quantified by the frequency spectrum of the received signal being determined and monitoring of the level meter carried out in the frequency domain.

Abstract: A TDR fill level measuring device for measuring the fill level of a medium in a container, having a transmitting unit for transmitting a pulse-shaped electromagnetic measuring signal, a receiving unit for receiving a reflection signal, an evaluation unit for evaluating the reflection signal and a waveguide for guiding the measuring signal and the reflection signal, the waveguide having at least two waveguide sections, each of which has a functional waveguide cross-sectional face, wherein the functional waveguide cross-sectional face corresponds to the cross-sectional face of the waveguide conductor, wherein a reference reflector is present, at least a part of the measuring signal being reflected at least once on the reference reflector during operation. High reliability and a simply design are achieved by the reference reflection being formed by a transition between two waveguide sections having different shapes and/or different sizes of the functional waveguide cross-sectional face.

Abstract: A method for determining the fill level of a process medium arranged in a container using a TDR fill level meter having at least one signal line for guiding an electromagnetic signal, a signal line head and an electronics unit, the signal line extending into the process medium, the method having at least the steps of generating a pulsed transmitter signal with the electronics unit, wherein the transmission signal propagates along the signal line as measuring signal with changing amplitude, detecting and evaluating at least one reflection signal with the electronics unit, wherein the reflection signal is a reflection of the measuring signal on an interface between a first and a second medium having different impedances, the relative permittivity of the second medium is determined at least in dependence on the amplitude of the measuring signal transmitted through the first medium and the amplitude of the reflection signal.

Abstract: A level meter and a method for monitoring the level meter operating according to the radar principle, in which a signal conductor is lead out of an inner space of a leakage chamber of a bracket housing through a process-side opening of the leakage chamber and/or of the bracket housing into the process-side outer space of the bracket housing. The method involves transmitting a signal in the form of a pulse along the signal conductor, receiving a reflected received signal, relaying the received signal to the control and evaluation unit. In addition to the simple verification of the presence of a leak, a change in the received signal can also be quantified by the frequency spectrum of the received signal being determined and monitoring of the level meter carried out in the frequency domain.