Abstract: A transmitting and/or receiving head for a sonic flowmeter measuring moving fluids by the runtime method, with an enclosure, an ultrasonic transducer transmitting ultrasound signals into and/or receiving ultrasound signals from the moving fluid and with an ultrasound waveguide by way of which the ultrasound signals are injected into and/or extracted from the moving fluid. The transmitting and/or receiving head is particularly well suited to utilization in a sonic flowmeter for very hot fluids, especially hot gases, by virtue of the fact that it employs an ultrasound waveguide in the form of an elongated sonic funnel offering high thermal conduction resistance.

Abstract: A transmitting and/or receiving head for a sonic flowmeter measuring moving fluids by the runtime method, with an enclosure, an ultrasonic transducer transmitting ultrasound signals into and/or receiving ultrasound signals from the moving fluid and with an ultrasound waveguide by way of which the ultrasound signals are injected into and/or extracted from the moving fluid. The transmitting and/or receiving head is particularly well suited to utilization in a sonic flowmeter for very hot fluids, especially hot gases, by virtue of the fact that it employs an ultrasound waveguide in the form of an elongated sonic funnel offering high thermal conduction resistance.

Abstract: An ultrasonic flowmeter for flowing media, has a measuring tube and at least one ultrasonic transducer, the ultrasonic transducer being installed in contact with the flowing medium in a transducer pocket of the measuring tube. The flowmeter eliminates the disadvantages and problems present in the known ultrasonic flowmeters, caused by eddies generated by the transducer pocket, by providing the transducer pocket with a grid having a mesh, in which the grid is located at the entrance side of the transducer pocket.

Abstract: The invention concerns a method and a device for ultrasound measurement of the flow of flowing media with a measuring tube (1), with at least two pairs of ultrasound transducers arranged on the measuring tube, each forming a measuring path (M1,M2,M3,M4,M5), with a transducer (2) determining the velocities of the medium along the measuring paths (M1,M2,M3,M4,M5) from the signals of the pair of ultrasound transducers and with an adder (3) determining the flow quantity of the medium from the velocities of the medium along the measuring paths (M1,M2,M3,M4,M5).According to the invention, such a method and such a device are designed with a Reynolds' number meter (5) that determines the Reynolds' number constantly and a flow-quantity corrector (6) connected to the adder (3) and the Reynolds' meter (5).

Abstract: The invention concerns and ultrasound flow rate measurement method by means of a measuring tube and at least two pairs of ultrasound transducers located on the measuring tube, in each case forming a measuring path, whereby the radial components of at least two measuring paths deviate from each other with respect to the axis of the measuring tube and in the case of which the measured value for the rate of flow of a flowing medium is determined from the velocity of the medium along at least two measuring paths. In accordance with the invention an ultrasound flow measuring method of this kind is further developed in that the eddy intensity in the medium is determined from the velocities of the medium along the measuring paths, the relation between angular momentum and axial momentum enters into the determination of the eddy intensity at least approximately, and the measured value for the rate of flow is corrected by means of the eddy intensity.