Abstract: A method for operating an ultrasonic measuring device for measuring a property of a medium includes: an arrangement of at least two pair of ultrasonic transducers for emitting and receiving ultrasonic signals across a signal path through a fluid; a holding apparatus having a wall in contact with the medium and a flat wall section for holding the ultrasonic transducers; an electronic circuit configured to operate the ultrasonic transducers and to provide measured values of the property, wherein the ultrasonic transducers form Lamb oscillations in the respectively associated wall, wherein at least two pair of the at least two pair of ultrasonic transducers each excite and capture different modes of Lamb oscillations, wherein the different modes are excited in groups, wherein a time delay between temporally adjacent emissions of ultrasonic signals is shorter than a shortest propagation time of the ultrasonic signals between associated ultrasonic transducers.

Abstract: An ultrasound instrument for detecting a measured value of a medium includes a measurement chamber having a chamber wall and a longitudinal axis; a pair of ultrasound transducers configured to transmit ultrasound signals along a signal path between ultrasound transducers of the pair through the measurement chamber and to receive ultrasound signals, wherein the signal path includes a signal reflection on a reflection surface, wherein the chamber wall in a region of the reflection surface opposite a first chamber side is configured to prevent a reflection of an ultrasound signal on a chamber outer surface of the chamber wall in the direction of the signal path, wherein the chamber wall has, in the region of the reflection surface, a maximum wall thickness which is at least a factor of 1.5 greater than a Rayleigh wavelength, associated with a central frequency, of the ultrasound signal in the chamber wall.

Abstract: An ultrasound instrument for detecting a measured value of a medium includes a measurement chamber having a chamber wall and a longitudinal axis; a pair of ultrasound transducers configured to transmit ultrasound signals along a signal path between ultrasound transducers of the pair through the measurement chamber and to receive ultrasound signals, wherein the signal path includes a signal reflection on a reflection surface, wherein the chamber wall in a region of the reflection surface opposite a first chamber side is configured to prevent a reflection of an ultrasound signal on a chamber outer surface of the chamber wall in the direction of the signal path, wherein the chamber wall has, in the region of the reflection surface, a maximum wall thickness which is at least a factor of 1.5 greater than a Rayleigh wavelength, associated with a central frequency, of the ultrasound signal in the chamber wall.

Abstract: A method for determining physical and/or chemical properties of a medium on the basis of at least one first and one second acoustic wave, which each have at least partly propagated through the medium from at least one transmitter to at least one receiver, is provided. From receive signals generated at least two receivers a runtime difference of the acoustic waves and/or an absolute runtime of an acoustic wave is determined and by means of a determined runtime difference and/or a determined absolute runtime physical and/or chemical properties of the medium are determined, such as for example a mean flow velocity.

Abstract: A transport vehicle includes a chassis with at least two load carriers which are placed next to and at a distance from each other. The distance between the at least two load carriers are modifiable in order to modify the width of the transport vehicle. The at least two load carriers of the transport vehicle are connected to one another by at least one articulated twin-arm structure.

Abstract: A method for determining physical and/or chemical properties of a medium on the basis of at least one first and one second acoustic wave, which each have at least partly propagated through the medium from at least one transmitter to at least one receiver, is provided. From receive signals generated at least two receivers a runtime difference of the acoustic waves and/or an absolute runtime of an acoustic wave is determined and by means of a determined runtime difference and/or a determined absolute runtime physical and/or chemical properties of the medium are determined, such as for example a mean flow velocity.