An ultrasonic level sensor includes: a housing; an ultrasonic transducer having a face surface for emitting an ultrasonic signal; a reflector with a flat surface positioned at an angle with respect to the face surface of the ultrasonic transducer for reflecting and directing the ultrasonic signal to a surface of a material in a container; and a scattering structure to reflect unwanted scattered ultrasonic signals away from the surface of the liquid, wherein the ultrasonic signal is reflected from the surface of the material and from the flat surface of the reflector and received by the ultrasonic transducer.

A device for measuring the filling level of a liquid in a container is provided, which uses an ultrasound sensor. The ultrasound sensor is associated with a damping cup with at least one antechamber, and the antechamber has at least one outer ring and one inner ring. The inner ring is arranged within the outer ring and the ceiling of the inner ring has different heights. The ceiling has a lowest point and a highest point. In the area of the ceiling the inner ring is provided with a venting connection with the outer ring. The venting connection between the inner ring and the outer ring is located at the highest point of the inner ring. The ceiling of the outer ring has different heights including a lowest point and a highest point. A vent hole is provided at the highest point of the outer ring.

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. Mass distribution, stiffness and/or geometry of the oscillatable unit is/are selected in such a manner that at least one of the oscillation modes of the oscillatable unit higher in reference to the oscillation mode corresponding to the excitation frequency lies in the range between two neighboring whole-numbered multiples of the excitation frequency.

The present disclosure relates to an ultrasound transducer having at least one transducer element for sending or receiving ultrasound signals. The ultrasound transducer includes a matching element acoustically coupled to the transducer element that is designed to ensure acoustic matching between the transducer element and a medium that acts on the matching element. In a first subregion of the axial extent, the matching element partially fills each cross section of the matching element, and a filling component in the first subregion along the first longitudinal axis monotonically increases in the direction of the first side. The matching element has a plurality of ring elements in the first subregion arranged concentrically around the first longitudinal axis. Each ring element partially fills each cross section in the first subregion, wherein the first subregion comprises at least 80% of an axial extent of the matching element along the first longitudinal axis.

Methods and systems for measuring pipe parameters using guided acoustic wave modes are provided. The method includes receiving data corresponding to an acoustic signal, wherein the data are obtained by transmitting an excitation pulse at a specified frequency and detecting the resulting acoustic signal using an acoustic transducer attached to the outer surface of the pipe wall. The method includes analyzing the data to identify guided acoustic wave modes including at least two of: a C-SH acoustic wave mode that travels within the pipe wall; a C-LT acoustic wave mode that travels within the near-surface region of the pipe wall; and/or a CA acoustic wave mode that travels within the pipe cavity. The method includes calibrating the parameter measurement using the C-SH acoustic wave mode and determining the parameter measurement based on the phase velocity and/or the amplitude of the C-LT acoustic wave mode and/or the CA acoustic wave mode.

The invention is a fill-level measuring device having the following features: a housing, a membrane, a first drive unit have a first bolt, the bolt being coupled to the membrane, a second drive unit having a second bolt, the second bolt being operatively connected to the membrane and being connected to the housing at an end of the second bolt facing the membrane by means of an intermediate bottom, and the first drive unit and the second drive unit are mechanically connected to each other in series.

A fill level gauge is described with a rinsing device for rinsing a fill level sensor, comprising a sensor for detecting a measuring signal as well as a measurement device connected to the sensor for determining a measurement from the detected measuring signal, with the measurement device being connected to a comparator for comparing the measurement determined with a first reference value at a predetermined condition of comparison, which comprises a control signal output for issuing a control signal, with the rinsing device being coupled to the control signal output or being connected to the control signal output such that, when the condition of comparison is fulfilled, the control signal output transmits a control signal to the rinsing device for activating said rinsing device so that the rinsing device is activated.

A multi-path acoustic signal apparatus, system, and apparatus for use in material detection are provided. The apparatus has a plurality of acoustic sensors positioned along a first portion of a fluid container. At least one acoustic signal is transmitted into the fluid container by each of the plurality of acoustic sensors. At least one additional acoustic sensor is positioned along a second portion of the fluid container, wherein the second portion is substantially opposite the first portion. The at least one additional acoustic sensor receives at least a portion of the acoustic signals from the plurality of acoustic sensors. A reflected acoustic signal is generated from an impedance barrier between the fluid container and a fluid therein. A characteristic of a material of the fluid container and/or the fluid therein are determined.

A sensor system for detecting water or air in a hollow member comprises a first acoustic sensor assembly in a first housing on one side of the hollow member, a second acoustic sensor assembly in a second housing on the opposite side, a controller unit connected to the first and/or second sensor assemblies, and where the first and second sensor assemblies and the controller unit are provided with power supply. Each of the first and second sensor assemblies comprises a set of probes connected to electronics for transmitting and receiving signals, and where the housings comprise fastening means for connecting the housings and the probes to the hollow member. The controller unit comprises a microcontroller, software for controlling and coordinating transmission and reception of signals between said probes, and means for registering and logging data generated by the sensor assemblies. A method detects water or air in a hollow member.

A sensor (1) including at least one array (10), including a plurality of acoustic transducers (12); a controller (42) for controlling each transducer (12) to be selectively in a generation mode for generating an analysis signal, or a reception mode for receiving an analysis signal, and, for controlling the sensor (1) to perform scans of the at least one array (10), each scan having a plurality of scan steps, such that, during each scan step, at least one transducer (12) is in the generation mode and at least one other transducer (12) is in the reception mode; and, a processor (44) for processing one or more signals receivable from one or more of the controller (42), a transducer (12) in generation mode and a transducer (12) in reception mode to determine at least one characteristic from the one or more signals.