Abstract: The present disclosure relates to a device for determining and/or monitoring at least one process variable of a medium comprising an electronics unit and a sensor unit having a mechanically oscillatable unit and at least a first tubular piezoelectric element. The device is embodied to excite the mechanically oscillatable unit using a first excitation signal, such that mechanical oscillations are executed in a first oscillation mode, and to receive the mechanical oscillations of the mechanically oscillatable unit in the first oscillation mode and to convert them into an electrical, received signal. The electronics unit is adapted to ascertain the at least one process variable from the received signal. And the mechanical, oscillatable unit includes in an end region at least a first cylindrical bore, in which the at least first piezoelectric element is at least partially inserted.

Abstract: A converting element for converting between mechanical vibrations and electric signals comprises piezoelectric elements arranged in a stack and a connector, for example a wire. At the outside of the stack are grooves between adjacent piezoelectric elements. The connector is disposed within the grooves which are filled with an electrically conductive filling material. The connector is connected to the stack via a sintering process. The connector comprises inner segments arranged within the grooves and outer segments arranged outside of the grooves. The outer segments are arranged at the outside of the stack. A vibronic sensor may contain the converting unit.

Abstract: A decoupling unit for a device for determining and/or monitoring a process variable of a medium includes a sensor unit having a mechanically vibratable unit and a drive/receiving unit, which is configured to excite the vibratable unit to vibrate using an electrical excitation signal, to receive the vibrations of the vibratable unit, and to convert the vibrations into an electrical reception signal. The decoupling unit includes a tubular body, wherein a first end region is configured to connect to the sensor unit of the device and a second end region is configured to connect to a further component of the device, in particular an extension element, or a housing of an electronics system of the device, and wherein a wall thickness of the tubular body is variable along a longitudinal axis of the tubular body.

Abstract: An apparatus for determining and/or monitoring at least one process variable of a medium in a container, comprising at least an oscillatable unit having at least one membrane, and at least one oscillatory element, a driving/receiving unit embodied to excite the mechanically oscillatable unit by means of an electrical, exciter signal of adjustable excitation frequency to execute oscillations in an oscillation mode corresponding to the excitation frequency and to receive mechanical oscillations from the oscillatable unit and to convert such into an electrical received signal, and an electronics unit embodied, to produce the exciter signal, and to ascertain from the received signal the at least one process variable. The membrane is connected with the driving/receiving unit. The oscillatory element has the shape of an oscillatory rod, on which a paddle is terminally formed, and the oscillatory element is secured on the membrane in an end region remote from the paddle.

Abstract: An apparatus for determining and/or monitoring at least one process variable of a medium in a container, comprising at least an oscillatable unit having at least one membrane, and at least one oscillatory element, a driving/receiving unit embodied to excite the mechanically oscillatable unit by means of an electrical, exciter signal of adjustable excitation frequency to execute oscillations in an oscillation mode corresponding to the excitation frequency and to receive mechanical oscillations from the oscillatable unit and to convert such into an electrical received signal, and an electronics unit embodied, to produce the exciter signal, and to ascertain from the received signal the at least one process variable. The membrane is connected with the driving/receiving unit. The oscillatory element has the shape of an oscillatory rod, on which a paddle is terminally formed, and the oscillatory element is secured on the membrane in an end region remote from the paddle.

Abstract: A fill-level measuring device with a membrane, which is placed in such a manner on one of the two end region of a tubular housing that it seals the housing on such end region. An oscillatable unit is placed on the side of the membrane facing away from the housing, with a driver/receiver unit, which is composed of a plurality of piezoelectric elements arranged in a stack. The driver/receiver unit is placed via a pressure screw unit in such a manner in the housing that it oscillates in the direction of the longitudinal axis of the housing between the membrane and the pressure screw unit. The driver/receiver unit excites the oscillatable unit via the membrane to execute oscillations, with a control/evaluation unit, which evaluates amplitude, frequency and/or phase of the oscillations of the oscillatable unit and with a temperature sensor for determining temperature of the medium.

Abstract: A fill-level measuring device with a membrane, which is placed in such a manner on one of the two end region of a tubular housing that it seals the housing on such end region. An oscillatable unit is placed on the side of the membrane facing away from the housing, with a driver/receiver unit, which is composed of a plurality of piezoelectric elements arranged in a stack. The driver/receiver unit is placed via a pressure screw unit in such a manner in the housing that it oscillates in the direction of the longitudinal axis of the housing between the membrane and the pressure screw unit. The driver/receiver unit excites the oscillatable unit via the membrane to execute oscillations, with a control/evaluation unit, which evaluates amplitude, frequency and/or phase of the oscillations of the oscillatable unit and with a temperature sensor for determining temperature of the medium.