Abstract: An ultrasonic transducer for an ultrasonic flow measuring device, comprising a first housing part having an ultrasonic window and adjoining, rotationally symmetric walls, wherein there adjoins on the walls of the first housing part, coaxially with the walls of the first housing part, a first ring as resonator, which forms an end of the first housing part.

Abstract: A method for monitoring the operating state of a first ultrasonic transducer in an ultrasonic, flow measuring device having at least one measuring tube and at least two ultrasonic transducers, including steps as follows: a) providing a first value or a plurality of first values, which relate to the geometric arrangement of the first ultrasonic transducer in the measuring tube and/or to the geometric arrangement of the first ultrasonic transducer relative to a second ultrasonic transducer; b) ascertaining a second value or a plurality of second values for a flow velocity of a medium located in the measuring tube c) providing a third value and/or a plurality of third values for temperature and/or pressure of the medium located in the measuring tube; d) simulating a desired value of a signal strength taking into consideration the first, second and/or third values; and e) comparing the simulated desired value of a signal strength with an ascertained real value of the signal strength.

Abstract: Flow measuring device for ascertaining flow of a measured medium flowing through a measuring tube, which flow measuring device has a first housing for protruding into the measured medium, wherein the first housing has a first surface intended to face the measured medium, wherein the flow measuring device includes a second surface for bounding the measured medium, and wherein each separation between the first surface for bounding the first housing from measured medium, the second surface for bounding the measured medium and the first surface of the first housing amounts to at least 1 mm.

Abstract: An ultrasonic transducer for an ultrasonic flow measuring device, comprising a first housing part and a second housing part. The second housing part is axially guided in the first housing part and is so biased relative to the first housing part that, in a first state of the ultrasonic transducer, a first axial stop of the second housing part rests on a first axial stop of the first housing part, wherein, by applying, counter to the bias, a predetermined force on a second axial stop of the second housing part, the second housing part is axially shiftable, so that, in a second state of the ultrasonic transducer, the first axial stop of the second housing part is moved out of the first state.

Abstract: Method and measuring device for measuring at least one measured variable. A first sensor transmits a first measurement signal, which includes at least one half-wave of a mechanical wave or an electromagnetic wave, and, at a time t from the first measurement signal, transmits at least a second measurement signal. At least a second sensor receives the measurement signals. The travel time and TOF1 of the first measurement signal between transmitting of the first measurement signal and receiving of the first measurement signal is known, wherein the time t is so selected that it is a whole numbered multiple of the travel time TOF1 of the first measurement signal or that it is a whole numbered multiple of the average value of the travel times TOF1 and TOF2, wherein the travel time and TOF2 between transmitting a third measurement signal from the second sensor and receiving of the third measurement signal by the first sensor is known.

Abstract: A detachable plug connector, in particular a multiple plug connector, comprising a plug side (1) having an insulating plug housing (10) and having a plug element (2) embedded in the plug housing (10) comprising a pin segment (20) and a contact segment (21) for the electrically conductive connection to an external element, in particular a cable, and a socket side (3) having an insulating socket housing (30) and having a socket element (4) embedded in the socket housing (3) having a socket segment (40) and a contact segment (41) for an electrically conductive connection to an external element, in particular a cable (9), wherein the plug housing (10) can be plugged together with the socket housing (30) in a plug direction (S), and whereby the pin segments (20) of the plug elements (2) protrude into the socket segments (40) of the socket elements (4) in a contacting region (K1, K2) in the plugged state so that an electrical contact can be conveyed between the socket side (3) and the plug side (1) via the socket s

Abstract: A method for ascertaining flow of a fluid, which is a gas mixture, through a circularly cylindrical measuring tube having a straight, measuring tube, longitudinal axis and an inner diameter DI, wherein at least one component of the gas mixture is a hydrocarbon. The steps comprise: ascertaining a first average flow velocity vL by means of travel-time difference measurement of acoustic signals along a signal path; ascertaining a modified Reynolds number Remod according to the formula Remod=(vL*DI)/vkin, wherein the kinematic viscosity vkin of the fluid is known; and ascertaining a second average flow velocity vA by means of a known function vA=f(Remod) as a function of the modified Reynolds number Remod, wherein the method step of ascertaining the modified Reynolds number Remod precedes the method step of ascertaining the kinematic viscosity vkin of the fluid.

Abstract: Flow measuring device for ascertaining flow of a measured medium flowing through a measuring tube, which flow measuring device has a first housing for protruding into the measured medium, wherein the first housing has a first surface intended to face the measured medium, wherein the flow measuring device includes a second surface for bounding the measured medium, and wherein each separation between the first surface for bounding the first housing from measured medium, the second surface for bounding the measured medium and the first surface of the first housing amounts to at least 1 mm.

Abstract: An ultrasonic transducer for an ultrasonic, flow measuring device comprising an electromechanical transducer element and an ultrasound window, wherein an adapting, or matching, layer liquid at operating conditions of the ultrasonic transducer is arranged between the electromechanical transducer element and the ultrasound window, wherein the ultrasonic transducer has holding means, which exert a releasable force toward the ultrasound window on the electromechanical transducer element, in order to hold the electromechanical transducer element in a predetermined position relative to the ultrasound window.

Abstract: A measuring tube, a measuring system and a method for determining and/or monitoring flow through a measuring tube, comprising a measuring tube, on which ultrasonic transducers are releasably placeable. The ultrasonic transducers transmit and/or receive ultrasonic signals, which pass through the measuring tube approximately coaxially to the measuring tube axis.

Abstract: A measuring system for determining and/or monitoring flow of a measured medium through a measuring tube, including: at least one ultrasonic transducer; and at least one control/evaluation unit, which, on the basis of measurement signals or on the basis of measurement data derived from the measurement signals, ascertains volume- and/or mass-flow of the medium flowing in the measuring tube; wherein the ultrasonic transducer has at least one electromechanical transducer element, which sends and/or receives ultrasonic signals; and at least one coupling layer in the region between electromechanical transducer element and measured medium, which coupling layer conducts the ultrasonic signals, and which ultrasonic transducer is acoustically coupleable with the measuring tube and at least partially fittable on the outer shape of the measuring tube and which electromechanical transducer element is flexible.

Abstract: A measuring device for registering at least one measured value of at least one process variable. The measuring device comprises a measuring tube. The measuring tube has at least one T-joint, on which at least one measurement transmitter is arranged, wherein the measuring tube together with the T-joint is monolithic, and wherein the T-joint is producible from the measuring tube at least partially by a plastic deformation method.

Abstract: An ultrasonic transducer for an ultrasonic, flow measuring device comprising an electromechanical transducer element and an ultrasound window, wherein an adapting, or matching, layer liquid at operating conditions of the ultrasonic transducer is arranged between the electromechanical transducer element and the ultrasound window, wherein the ultrasonic transducer has holding means, which exert a releasable force toward the ultrasound window on the electromechanical transducer element, in order to hold the electromechanical transducer element in a predetermined position relative to the ultrasound window.

Abstract: Method and measuring device for measuring at least one measured variable. A first sensor transmits a first measurement signal, which includes at least one half-wave of a mechanical wave or an electromagnetic wave, and, at a time t from the first measurement signal, transmits at least a second measurement signal. At least a second sensor receives the measurement signals. The travel time and TOF1 of the first measurement signal between transmitting of the first measurement signal and receiving of the first measurement signal is known, wherein the time t is so selected that it is a whole numbered multiple of the travel time TOF1 of the first measurement signal or that it is a whole numbered multiple of the average value of the travel times TOF1 and TOF2, wherein the travel time and TOF2 between transmitting a third measurement signal from the second sensor and receiving of the third measurement signal by the first sensor is known.

Abstract: A measuring tube, a measuring system and a method for determining and/or monitoring flow through a measuring tube, comprising a measuring tube, on which ultrasonic transducers are releasably placeable. The ultrasonic transducers transmit and/or receive ultrasonic signals, which pass through the measuring tube approximately coaxially to the measuring tube axis.

Abstract: Measuring system for determining and/or monitoring flow of a measured medium through a measuring tube, including: At least one ultrasonic transducer; and at least one control/evaluation unit, which, on the basis of measurement signals or on the basis of measurement data derived from the measurement signals, ascertains volume- and/or mass-flow of the medium flowing in the measuring tube; wherein the ultrasonic transducer has at least one electromechanical transducer element, which sends and/or receives ultrasonic signals; and at least one coupling layer in the region between electromechanical transducer element and measured medium, which coupling layer conducts the ultrasonic signals, and which ultrasonic transducer is acoustically coupleable with the measuring tube and at least partially fittable on the outer shape of the measuring tube and which electromechanical transducer element is flexible.

Abstract: A measuring device for registering at least one measured value of at least one process variable. The measuring device comprises a measuring tube. The measuring tube has at least one T-joint, on which at least one measurement transmitter is arranged, wherein the measuring tube together with the T-joint is monolithic, and wherein the T-joint is producible from the measuring tube at least partially by a plastic deformation method.