Abstract: A corrosion-resistant vibratory flowmeter (5) is provided. The flowmeter (5) includes a flowmeter assembly (10) including one or more flow tubes (103) configured to be vibrated and a diffusion coating (202) over at least a portion of the flowmeter assembly (10). The diffusion coating (202) is diffused into and comprises a part of the flowmeter assembly (10).

Abstract: A measuring transducer comprises: a transducer housing, of which an inlet-side is formed by means of an inlet-side, flow divider having exactly four flow openings spaced from one another and an outlet-side formed by means of an outlet-side, flow divider having exactly four flow openings from one another; a tube arrangement having exactly four, curved, or bent, measuring tubes connected to the flow dividers for guiding flowing medium along flow paths connected in parallel. Each of the four measuring tubes opens with an inlet-side, measuring tube end into one of the flow openings of the flow divider and with an outlet-side, measuring tube end into one the flow openings of the flow divider. Two flow dividers are arranged in the measuring transducer. An electromechanical exciter mechanism is provided.

Abstract: The present invention provides a vibrating sensor assembly (310). The vibrating sensor assembly (310) includes a conduit (103A), a driver (104), and at least a first pick-off (105). The driver (104) includes a first driver component (104a) and a second driver component (104b). The first pick-off (105) includes a first pick-off component (105a) and a second pick-off component (105b). The vibrating sensor assembly (310) also includes a first reference member (250). The first pick-off component (105a) is coupled to the conduit (103A) while the second pick-off component (105b) is coupled to the first reference member (250). The vibrating sensor assembly (310) also includes a second reference member (350). The first driver component (104a) is coupled to the conduit (103A) while the second driver component (104b) is coupled to the second reference member (350).

Abstract: A Coriolis mass flowmeter (1) having at least one curved measuring tube (2), at least one oscillation generator (3), at least one oscillation sensor (4), at least one measuring device electronics (5) and a housing (6). To provide the housing (6) with increased pressure resistance, in particular against external positive pressure, the housing (6) has a first housing shell and a second housing shell, the first housing shell and the second housing shell completely surrounding the measuring tube (2) so as to form at least a first pressure-resistant hollow space around the measuring tube (2), and the first housing shell and the second housing shell forming a bridge (13) between the inlet (10) and the outlet (11) of the measuring tube (2).

Abstract: A Coriolis mass flow meter (1) which has at least two curved measurement tubes (2), at least one actuator arrangement, at least one sensor arrangement and comprising at least one housing structure (5), the measurement tubes (2) being connected at their inlet end portion and an outlet end portion with at least a first oscillation node plate (3) and a second oscillation node plate (4). The flow meter achieves increased measurement accuracy and a reduced susceptibility to perturbing oscillations by at least one of the oscillation node plates being connected at the inlet end and the outlet end of the housing structure (5). A third oscillation node plate (6) can be additionally arranged on the inlet end portion and the outlet end portion of the tubes, the third oscillation node plate being connected to the housing structure.

Abstract: A method for operating a fluid flow system (300) is provided. The fluid flow system (300) includes a fluid flowing through a pipeline (301), a first pressure sensor (303) located within the pipeline (301), and a vibrating meter (5). The vibrating meter (5) includes a sensor assembly (10) in fluid communication with the first pressure sensor (303). The method includes steps of measuring a pressure of the fluid within the pipeline (301) using the first pressure sensor (303) and measuring one or more flow characteristics of the fluid using the vibrating meter (5). The method further includes a step of determining a static pressure of the fluid based on the pressure of the fluid within the pipeline (301) and the one or more flow characteristics. The method further includes a step of determining if the fluid contains at least some gas based on the static pressure of the fluid.

Abstract: A flow meter (20) including one or more flow tubes (103) and a driver (104A, 104B) adapted to vibrate the one or more flow tubes (103) at a drive frequency is provided. The flow meter (20) comprises a gusset (260). The gusset (260) is coupled to and extends along the flow tube (103) such that a frequency separation between the drive frequency and at least a second vibration frequency is increased.

Abstract: A Coriolis mass flowmeter (1) having at least one sensor arrangement (2), at least one transducer (3) and at least one housing (4), wherein the sensor arrangement (2) has at least one measuring tube (5) that can be excited to oscillation, at least one oscillation generator (6) and at least one oscillation sensor (7), wherein the transducer (3) at least in part has evaluation and power electronics for controlling and measurement evaluation of the sensor arrangement, wherein the sensor arrangement (2) and the transducer (3) are arranged adjacent to one another in a common volume defined by the housing (4). A Coriolis mass flowmeter of the described type, in which the physical interaction between the sensor arrangement and transducer is reduced, is realized by the provision of a thermal barrier (8) arranged at least in a space between the sensor arrangement (2) and the transducer (3).

Abstract: Measuring transducer of vibration-type for a fluid flowing in a pipeline. The measuring transducer includes, in such case, a curved measuring tube for conveying the fluid, a counteroscillator having two counteroscillator arms, which are arranged on both sides of the measuring tube, and which, in each case, essentially follow the curve of the measuring tube, and which are coupled to one another in such a manner, that, during operation, they oscillate in phase with one another, and which are affixed to the measuring tube on the inlet side and outlet sides for forming corresponding coupling zones. The measuring transducer also includes an exciter mechanism, via which, during operation, the measuring tube and the counteroscillator are excitable to oscillations of opposite phase to one another.

Abstract: A Coriolis flow sensor including a loop-shaped Coriolis tube mounted in a housing with two ends lying next to one another, the ends being fixed in a fixation element, while the portion of the tube located between the ends lies free from the housing, which flow sensor includes an excitation element for causing the tube to oscillate about an excitation axis as well as a detection element for detecting displacements of portions of the tube during operation.

Abstract: A measuring transducer having exactly four flow openings, and an outlet-side housing end formed by means of an outlet-side flow divider having exactly four flow openings. A tube arrangement has exactly four curved or bent measuring tubes connected to the flow dividers for guiding flowing medium along flow paths connected in parallel. Each of the four measuring tubes opens with an inlet-side measuring tube end into one of the flow openings of the inlet-side flow divider, and with an outlet-side measuring tube end into one of the flow openings of the outlet-side flow divider. A first coupling element for adjusting eigenfrequencies of natural oscillation modes of the tube arrangement. An electro-mechanical exciter mechanism of the measuring transducer serves for producing and/or maintaining mechanical oscillations of the four measuring tubes.

Abstract: The measuring transducer comprises: a transducer housing, of which an inlet-side, housing end is formed by means of a flow divider including four flow openings spaced, and an outlet-side, formed by means of a flow divider including four flow openings spaced, from one another. A tube arrangement including four curved measuring tubes connected to the flow dividers for guiding flowing medium along flow paths connected in parallel. Each measuring tubes opens with an inlet-side, measuring tube end into one of the flow openings of the flow divider and with an outlet-side, measuring tube end into one the flow openings of the flow divider. The two flow dividers are embodied and arranged in the measuring transducer, so that the tube arrangement extends both between a first and a second of the measuring tubes and between a third and a fourth of the measuring tubes.

Abstract: A Coriolis mass flowmeter with at least four bent measuring tubes, at least one actuator assembly and at least one sensor assembly, wherein a first measuring tube and a second measuring tube are located in a common first plane and a third measuring tube and a fourth measuring tube are located in a common second plane, wherein the first plane and the second plane run parallel to one another, and wherein all four measuring tubes are joined together in terms of flow on the input side and on the output side with a collector. A Coriolis mass flowmeter for large amounts of flow, which is improved in respect to its measurement accuracy, is implemented in that the geometry and/or the surface characteristics of the measuring tubes are set so that the tube flow resistance of all four measuring tubes is identical.

Abstract: A Coriolis mass flowmeter with a measuring tube through which a medium can flow, at least one actuator and at least one sensor, wherein the measuring tube is bent between its input and output ends into a first winding and a second winding, the first winding and the second winding merging into one another at a transitional section of the measuring tube. The first winding and the second winding run in parallel winding planes and wherein the first winding and the second winding can be excited to oscillation by the actuator and the oscillations detected by the sensor. The Coriolis mass flowmeter is comparably insensitive to the coupling of external oscillations in that oscillating sections of the first winding and the second winding are bent into a V shape that opens in a direction toward the transitional section of the measuring tube.

Abstract: A Coriolis mass flowmeter having two measuring tubes, wherein two neighboring oscillation node plates are provided on one end of the measuring tube that connect the two measuring tubes to one another and wherein the angle between the planes of both oscillation node plates is determined in such a manner that the vibration of the measuring tubes is minimal up to a predetermined driving force. A method of producing the flowmeter is also disclosed.

Abstract: The invention relates to a Coriolis mass flow meter comprising two U-shaped measuring tubes having in each case two outer tube portions and an intermediate central tube portion. It comprises a vibration exciter for the purpose of effecting defined excitation of a movement of the measuring tubes, two vibration sensors for detecting movements of the measuring tubes and also a housing for accommodating at least parts of the measuring tubes. The inlets and outlets are rigidly connected to the housing. A first and a second cross brace, disposed in the region of the tube between its inlets and outlets for the purpose of coupling the two measuring tubes, form the vibration nodes of the measuring tubes. A tube portion of one measuring tube is integrally united with a tube portion of the other measuring tube. Furthermore, the two tube portions are integrally united with parts of the housing or integrally united with of one of the cross braces.

Abstract: An apparatus for determining and/or monitoring of at least one flow parameter of a medium, wherein the medium flows through a measuring unit, wherein at least one exciter transducer element is provided, which, based on an exciter signal, excites the measuring unit to mechanical oscillations, and wherein at least one receiver transducer element is provided, which receives mechanical oscillations of the measuring unit as a received signal. The measuring unit has at least one guiding unit and one carrying unit, the medium flows through the guiding unit, the guiding unit and the carrying unit are mechanically coupled with one another, the receiver transducer element and the exciter transducer element are mechanically coupled with the carrying unit, and the receiver transducer element and the exciter transducer element are mechanically coupled indirectly via the carrying unit with the guiding unit.

Abstract: A flow meter (30) is provided that includes first and second flow tubes (103, 103?). The flow meter (30) also includes a stationary plate (250). At least a portion of the stationary plate (250) is positioned between the first and second flow tubes (103, 103?). At least one of a driver component or a pick-off components is coupled to the stationary plate (250).

Abstract: An apparatus for determining and/or monitoring at least one flow parameter of a medium, wherein the medium flows through at least one measuring tube essentially along an imaginary flow axis, wherein at least one exciter transducer element is provided, which, based on an exciter signal, excites the measuring tube to mechanical oscillations, and wherein at least one receiver transducer element is provided, which receives mechanical oscillations of the measuring tube as a received signal. The invention includes that at least one separating unit is provided, and that the separating unit is embodied and arranged in the measuring tube in such a manner, that at least two sub measuring tubes result in the measuring tube, wherein the medium flows through the at least two sub measuring tubes essentially along the imaginary flow axis.

Abstract: A process for producing a micromachined tube (microtube) suitable for microfluidic devices. The process entails isotropically etching a surface of a first substrate to define therein a channel having an arcuate cross-sectional profile, and forming a substrate structure by bonding the first substrate to a second substrate so that the second substrate overlies and encloses the channel to define a passage having a cross-sectional profile of which at least half is arcuate. The substrate structure can optionally then be thinned to define a microtube and walls thereof that surround the passage.

Abstract: A vibrating flow meter (205) is provided. The vibrating flow meter (205) comprises a flow conduit (210) including a first end portion (211) and a second end portion (212). The vibrating flow meter (205) further includes a case (300) surrounding at least a portion of the flow conduit (210). The vibrating flow meter (205) also includes a first case connect (290). The first case connect (290) comprises a first portion (295) coupled to the first end portion (211) of the flow conduit (210) and one or more deformable members (292, 293, 294) extending radially from the first portion (295) and coupled to the case (300) such that the first end portion (211) can rotate about a conduit axis (X).

Abstract: A flow meter (200) is provided that comprises a curved flow tube (203) and a balance member (250). The balance member (250) is positioned such that a centerline (341) of the balance member (250) lies on a plane of a centerline (340) of the curved flow tube (203). The flow meter (200) also includes a driver (104) including a first driver component (104a) and a second driver component (104b). The first driver component (104a) is coupled to the curved flow tube (203) while the second driver component (104b) is coupled to the balance member (250) proximate the first driver component (104a). The flow meter (200) also includes at least a first pick-off sensor (105). The first pick-off sensor (105) includes a first pick-off component (105a) and a second pick-off component (105b). The first pick-off component (105a) is coupled to the curved flow tube (203) while the second pick-off component (105b) is coupled to the balance member (250) proximate the first pick-off component (105a).

Abstract: Flowmeters are described in which a sensor signal received from a sensor that is attached to vibratable flowtube, so as to determine properties of a fluid within the flowtube, contains a drive signal component and a Coriolis mode component. The flowmeters are operable to determine drive parameters of the drive signal component, as well as Coriolis parameters of the Coriolis mode component. By analyzing the sensor signal based on the drive signal parameters, and not on the Coriolis signal parameters, the flowmeters are able to provide stable and accurate determinations of the properties of the fluid.

Abstract: A Coriolis flow sensor including a loop-shaped Coriolis tube mounted in a housing with two ends lying next to one another, the ends being fixed in a fixation element, while the portion of the tube located between the ends lies free from the housing, which flow sensor includes an excitation element for causing the tube to oscillate about an excitation axis as well as a detection element for detecting displacements of portions of the tube during operation. The tube is connected through the fixation element to a balancing member, the assembly of the balancing member and the tube being resiliently arranged with respect to the housing, while the excitation element are arranged to rotate the tube and the balancing member with counter-phase about the excitation axis.

Abstract: A measuring transducer of vibration type, especially a Coriolis mass flow meter, having a housing and a mass flow tube, wherein the mass flow tube is formed into a helix having a first loop and a second loop; wherein the mass flow tube has a securement element which affixes a peripheral point of the first loop relative to a neighboring peripheral point of the second loop; and wherein the mass flow tube has an oscillation exciter on a side lying opposite the securement element along the mass flow tube. The mass flow tube has provided between the oscillation exciter and the securement element at least one add-on part acting as a canceling mass.

Abstract: Motion is induced in a conduit that contains a fluid. The motion is induced such that the conduit oscillates in a first mode of vibration and a second mode of vibration. The first mode of vibration has a corresponding first frequency of vibration and the second mode of vibration has a corresponding second frequency of vibration. At least one of the first frequency of vibration or the second frequency of vibration is determined. A phase difference between the motion of the conduit at a first point of the conduit and the motion of the conduit at a second point of the conduit is determined. A quantity based on the phase difference and the determined frequency is determined. The quantity includes a ratio between the first frequency during a zero-flow condition and the second frequency during the zero-flow condition. A property of the fluid is determined based on the quantity.

Abstract: A Coriolis mass flowmeter (1) with at least one sensor arrangement (2) and at least one housing (3), in which the sensor arrangement (2) includes at least one measuring tube (4), at least one oscillation generator (5) and at least one oscillation sensor (6), and the measuring tube (4) being excited by the oscillation generator (5) in at least one operating frequency. To optimize production costs and weight relative to the size of the measuring device is implemented by at least one reinforcement element (10) being arranged in and joined to the housing (3) in such a manner that the implemented eigenfrequencies of the housing (3) are shifted away from the operating frequency of the measuring tube (4).

Abstract: A method for operating a Coriolis mass flowmeter in which a simple and reliable detection of a multi-phase flow is implemented by determining at least one first measured value for at least one state variable that is dependent on the amplitude in a multi-phase medium, exciting the measuring tube with the oscillation generator to oscillate at a predetermined oscillation frequency and a first amplitude, and to oscillate with the excitation frequency and a second amplitude, detecting the resulting oscillation of the measuring tube and determining at least a second measured value for the state variable that is dependent on the amplitude in a multi-phase medium from the determined resulting oscillation, and using the deviation of at least one of the first measured value from at least a corresponding second value as an indicator for the presence of a multi-phase flow.

Abstract: A subassembly of a Coriolis flowmeter is fabricated from a single monolithic piece of elastic polymeric material. The subassembly includes two flow-sensitive members and a base integrally connected to the two flow-sensitive members. The two flow-sensitive members include straight sections, and are substantially similar and parallel to each other. Flow passages are drilled along the straight sections of the two flow-sensitive members, and drilled entrances are sealed using the elastic polymeric material. A temperature sensor is fixedly attached to a flow-sensitive member for measuring a temperature of the flow-sensitive member and communicating the temperature to a metering electronics. The metering electronics determines a calibrated flow rate of fluid flowing through the Coriolis flowmeter that accounts for the temperature.

Abstract: A method for monitoring oscillation characteristics in a Coriolis, flow measuring device and to a correspondingly formed, Coriolis, flow measuring device in the case of which an excited oscillatory system is simulated with a digital model, which has at least one fittable parameter. The simulating includes, in such case, excitating the digital model in the same manner as the oscillatory system, calculating a simulation response variable of the simulated oscillations according to the digital model, and, performed over a plurality of signal modulations, iterative conforming of the at least one, fittable parameter in such a manner that the simulation response variable interatively approaches the response variable. Furthermore, it is ascertained whether a corresponding limit value is exceeded by the at least one, interatively ascertained parameter value for the at least one, fittable parameter or by at least one variable derived from the at least one, iteratively ascertained parameter value.

Abstract: Drive techniques for a digital flowmeter are described. The drive techniques account for delays caused during digital signal processing of sensor signals that correspond to a motion of a flowtube, as well as drive signals that impart motion to the flowtube. Such delays may be caused by a variety of factors, including delays associated with analog/digital conversion of the signals and/or filtering of the signals. The techniques include open-loop techniques and closed-loop techniques, which can be used separately or together during the start-up and operation of the digital flowmeter.

Abstract: A curved tube vibrating flow meter (5) includes a flow tube temperature sensor TT (190) and a plurality of case temperature sensors TC (303) affixed to one or more case locations of a case (300) of the curved tube vibrating flow meter (5). The plurality of case temperature sensors TC (303) generate a case temperature signal, wherein a plurality of case temperature sensor resistances at the one or more case locations form a combined case resistance related to thermal importances of the one or more case locations. Meter electronics (20) receives the flow tube temperature signal, receives the case temperature signal, and compensates the curved tube vibrating flow meter (5) for thermal stress using the flow tube temperature signal and the case temperature signal.

Abstract: A Coriolis mass flow meter (1) which has at least two curved measurement tubes (2), at least one actuator arrangement, at least one sensor arrangement and comprising at least one housing structure (5), the measurement tubes (2) being connected at their inlet end portion and an outlet end portion with at least a first oscillation node plate (3) and a second oscillation node plate (4). The flow meter achieves increased measurement accuracy and a reduced susceptibility to perturbing oscillations by at least one of the oscillation node plates being connected at the inlet end and the outlet end of the housing structure (5). A third oscillation node plate (6) can be additionally arranged on the inlet end portion and the outlet end portion of the tubes, the third oscillation node plate being connected to the housing structure.

Abstract: A controller for a flowmeter includes an input module operable to receive a sensor signal from a sensor connected to a vibratable flowtube. The sensor signal is related to a fluid flow through the flowtube. The controller also includes a signal processing system operable to receive the sensor signal, determine sensor signal characteristics, and output drive signal characteristics for a drive signal applied to the flowtube. An output module is operable to output the drive signal to the flowtube and a control system is operable to modify the drive signal and thereby maintain oscillation of the flowtube during a transition of the flowtube from a substantially empty state to a substantially full state.

Abstract: A microfluidic device and sensing method that utilize a resonating tube configured to have sufficient sensitivity to be capable of sensing the volume of a gas present as bubbles in a liquid or the flow rate and/or density of a gas or gas mixture flowing through the tube. The tube has a freestanding tube portion supported above a surface of a substrate so as to be capable of vibrating in a plane normal to the surface of the substrate. As a gas-containing fluid flows through an internal passage of the tube, a drive signal vibrates the freestanding tube portion at a resonant frequency thereof. Coriolis-induced deflections of the freestanding tube portion are sensed relative to the substrate to produce an output corresponding to the sensed deflections, and the drive signal and/or the output are assessed to determine the volume, density and/or flow rate of the gas of the gas-containing fluid.

Abstract: A method for operating a Coriolis mass flow rate meter and a Coriolis mass flow rate meter including an evaluation device, a measuring tube having a medium flowing therethrough and which is excited so as to perform oscillations, and at least two spaced oscillation pickups spaced apart in the longitudinal direction of the measuring tube to each generate an oscillation signal, wherein a first indicator variable based on the damping of the oscillations of the measuring tube is initially used to detect deposits in the measuring tube and if, based on the first indicator variable, increased damping is established, a second indicator variable is used, which is based on the manifestation of harmonics in the frequency spectrum of an oscillation signal such that reliable detection of deposits and therefore an indication of the state of meters and pipelines in a process engineering installation are advantageously possible.

Abstract: A Coriolis mass flowmeter with a measuring tube through which a medium can flow, at least one actuator and at least one sensor, wherein the measuring tube is bent between its input and output ends into a first winding and a second winding, the first winding and the second winding merging into one another at a transitional section of the measuring tube. The first winding and the second winding run in parallel winding planes and wherein the first winding and the second winding can be excited to oscillation by the actuator and the oscillations detected by the sensor. The Coriolis mass flowmeter is comparably insensitive to the coupling of external oscillations in that oscillating sections of the first winding and the second winding are bent into a V shape that opens in a direction toward the transitional section of the measuring tube.

Abstract: A Coriolis mass flowmeter with at least one measurement tube (2) for forming a flow channel, at least one vibration generator and at least one vibration pick-up, the measurement tube (2) having one inlet end (4), two vibration sections (3a, 3b) and one outlet end (5) and being bent at least in sections such that two U-shaped or V-shaped vibration sections (3a, 3b) which run in essentially parallel planes are formed, and the vibration sections (3a, 3b) can be excited to vibrations by the vibration generator. The flow channel, except for the inlet end (4), the vibration sections (3a, 3b) and the outlet end (5), runs within a solid base (6).

Abstract: A Coriolis mass flow meter targeted for measurement of a fluid with a minute flow rate is reduced in weight and size, the flow meter being in which a subframe supporting a vibration exciter and first and second detectors has an outer peripheral wall, a notch and an inner peripheral wall, a circuit board supported by a main frame is positioned in the portion of the notch, the circuit board is housed in a board case penetrating the main frame, and a liquid crystal monitor is mounted in the portion of the circuit board adjacent to supply/discharge portions of a pair of vibration tubes.

Abstract: For reducing an influence due to an external vibration, a frame has: a main frame that supports a vibration tube in a cantilever state; and a subframe that extends from the main frame toward a measurement portion side of the vibration tube, a detector and a vibration exciter are arranged on this subframe, and the outer case that surrounds the frame, the vibration tube and the like is engaged with the frame through the vibration isolating member.

Abstract: A Coriolis mass flowmeter having at least one measuring tube assembly (1) and at least one mounting assembly (2), wherein the mounting assembly (2) includes at least one bracket (3) mounted on the measuring tube assembly (1) and at least a part of an actuator assembly (4) and/or a sensor assembly (5) supported by the bracket (3) for oscillation generation and/or oscillation compilation so that measuring tube assembly (1) can be excited into oscillation in a reference oscillation plane (X-plane). The Coriolis mass flowmeter oscillation behavior is improved for increasing the quality of measurements by the center of gravity of the mounting assembly (2) being set in the reference oscillation plane.

Abstract: A measuring transducer comprises a transducer housing, of which an inlet-side housing end is formed by means of an inlet-side flow divider having eight, mutually spaced flow openings and an outlet-side housing end is formed by means of an outlet-side flow divider having eight, mutually spaced flow openings as well as a tube arrangement with eight bent measuring tubes for the conveying flowing medium, which, forming flow paths connected for parallel flow, are connected to the flow dividers, wherein each of the eight measuring tubes in each case opens with an inlet-side measuring tube end into one of the flow openings of the flow divider, and in each case opens with an outlet-side measuring tube end into one of the flow openings of the flow divider. An electro-mechanical exciter mechanism of the measuring transducer serves for producing and/or maintaining mechanical oscillations of the measuring tubes.

Abstract: A vibratory flow meter (5) for measuring flow characteristics of a three phase flow is provided according to the invention. The vibratory flow meter (5) includes a meter assembly (10) including pickoff sensors (105, 105?) and meter electronics (20) coupled to the pickoff sensors (105, 105?). The meter electronics (20) is configured to receive a vibrational response from the pickoff sensors (105, 105), generate a first density measurement of the three phase flow using a first frequency component of the vibrational response, and generate at least a second density measurement of the three phase flow using at least a second frequency component of the vibrational response. The at least second frequency component is a different frequency than the first frequency component. The meter electronics (20) is further configured to determine one or more flow characteristics from the first density measurement and the at least second density measurement.

Abstract: A measuring transducer comprises a housing, and a tube arrangement formed by means of at least two tubes extending within the housing. At least one tube is embodied as a measuring tube serving for conveying flowing medium and another tube is mechanically connected with the tube by means of a coupling element to form an inlet-side coupling zone and by means of a coupling element. The coupling element is arranged equally far removed from the housing end. One coupling element has, about an imaginary longitudinal axis of the tube arrangement imaginarily connecting a center of mass of the coupling element and a center of mass of the other coupling element, with an angle of intersection equal to that with the other coupling element, a bending stiffness, which deviates from a bending stiffness of the other coupling element about said imaginary longitudinal axis of the tube arrangement.

Abstract: A partially bonded brace bar assembly is provided according to an embodiment of the invention. A vibrating element adapted to vibrate about a bending axis (W, W?) is provided. The vibrating element has a high stress region (412). A brace bar (201 204) is bonded to the vibrating element using a partial bond (420). The partial bond (420) is formed only in the high stress region (412).

Abstract: A Coriolis mass flowmeter having a measuring tube that can be excited to oscillation and a magnet assembly (1) serving to generate oscillations and/or to receive oscillations. The magnet assembly (1) includes at least one permanent magnet (2) and a magnet holder (3) holding the permanent magnet (2). The Coriolis mass flowmeter that has a mounting for the permanent magnet, which can withstand long-term oscillation stress and can reliably protect the permanent magnet is implemented by the magnet holder (3) consisting of nonmagnetic metal such as stainless steel.

Abstract: A microelectromechanical system (MEMS) device and a method for operating the device to determine at least one property of a fluid. The device includes a base on a substrate and a tube structure extending from the base and spaced apart from a surface of the substrate. The tube structure includes at least one tube portion and more preferably at least a pair of parallel tube portions substantially lying in a plane, at least one continuous internal passage defined at least in part within the parallel tube portions, and an inlet and outlet of the internal passage fluidically connected to the base. A drive element is operable to induce vibrational movement in the tube structure in a plane of the tube structure and induce resonant vibrational movements in the tube portions. A sensing element senses the deflections of the tube portions when the tube structure is vibrated with the drive element.

Abstract: A method for installing and operating a Coriolis mass flowmeter operating having a measuring tube, wherein the measuring tube is excited to vibrate, a phase shift of the vibration of the measuring tube which is dependent on the mass flow of the measuring tube or a corresponding time difference is determined, the temperature of the measuring tube is determined and the corresponding mass flow is calculated using the determined time difference and the determined temperature by means of a computation rule. Highly accurate measurements are possible in that in the computation rule, at least one known theoretical or empirical material temperature dependence influencing the mass flow is taken into account by determining a device-specific temperature dependence of the mass flowmeter influencing the mass flow through a subsequent calibration process and the known theoretical or empirical material temperature dependence and the device-specific temperature dependence are used in determining the mass flow.

Abstract: A corrosion-resistant vibratory flowmeter (5) is provided. The flowmeter (5) includes a flowmeter assembly (10) including one or more flow tubes (103) configured to be vibrated and a diffusion coating (202) over at least a portion of the flowmeter assembly (10). The diffusion coating (202) is diffused into and comprises a part of the flowmeter assembly (10).

Abstract: A Coriolis flow sensor with a Coriolis tube that is fastened in a housing and that can be excited with a certain frequency, wherein a balancing mass (inertia) is arranged with rotational flexibility between the tube fastening and the housing. In particular, a spring steel plate is used for providing a connection rigidity between the balancing mass and the housing, which plate comprises a fixed portion and a movable portion cut out from the fixed portion, wherein the incisions are formed such that the fixed and movable portions are interconnected via resilient plate portions, which resilient plate portions are in particular elongate strips lying in one line and realizing a rotational flexibility (torsion), while abutments are provided which limit the amplitude of movements of the balancing mass.