A fluid measurement system (3) is provided having a Coriolis flowmeter (5) with a meter electronics (20) comprising a processing system (303) and a storage system (304). The Coriolis flowmeter (5) has a sensor assembly (10) comprising conduits (103A, 103B), wherein the sensor assembly (10) is in communication with meter electronics (20). The Coriolis flowmeter (5) has a plurality of pickoffs (105, 105) affixed to the conduits (103 A, 103B), that are in communication with the meter electronics (20). The Coriolis flowmeter (5) has a driver (104) affixed to the conduits (103A, 103B) that is in communication with the meter electronics (20). A gyroscopic sensor is in communication with the meter electronics (20). At least one actuator (406X, 406 Y, 406Z, 412) is coupled to the Coriolis flowmeter (5). The meter electronics (20) is configured to measure a fluid flow of a process fluid under acceleration through the sensor assembly (10).

A measuring transducer includes: a measuring tube arrangement having at least one measuring tube for conveying a flowable medium; at least a first exciter component of an oscillation exciter for exciting the at least one measuring tube to execute oscillations; at least a first sensor component of an oscillation sensor for registering oscillations of the at least one measuring tube; a fixing body arrangement, which is connected with the at least one measuring tube and via which a releasable connection with a support apparatus can be made; a connecting apparatus for releasable connecting of the measuring tube arrangement with a process line; and a fastener apparatus for forming a shape-interlocking and/or force-interlocking connection between the connecting apparatus and the fixing body arrangement.

The Coriolis mass flowmeter comprises a measuring transducer having at least one measuring tube (10), an exciter mechanism and a sensor arrangement as well as, both electrically coupled with the exciter mechanism as well as also with the sensor arrangement, an electronic transmitter circuit (ME) having a measurement- and control electronics (MCE) and a drive electronics (Exc) connected to the measuring and control electronics and/or driven by the measuring and control electronics. The measuring tube is adapted to convey a fluid measured substance flowing at least at times and during that to be caused to vibrate. Additionally, the exciter mechanism is adapted to convert electrical power supplied to it into forced mechanical power effecting mechanical oscillations of the at least one measuring tube and the sensor arrangement is adapted to register mechanical oscillations of the at least one measuring tube and to provide a first oscillation measuring signal (s1) representing, at least in part, oscillatory movements of the at least one measuring tube as well as to provide at least a second oscillation measuring signal (s2) representing, at least in part, oscillatory movements of the at least one measuring tube, in such a manner that the oscillation measuring signals follow a change of a mass flow rate of the measured substance guided in the measuring tube with a change of a phase difference, namely a change of a difference between a phase angle of the first oscillation measuring signal (s1) and a phase angle of the second oscillation measuring signal (s2). The sensor arrangement is, additionally, electrically coupled with the measuring and control electronics. The drive electronics is, in turn, electrically connected with the exciter mechanism and is adapted, in a first operating mode (I), to generate an electrical driver signal (e1) and therewith to supply electrical power to the exciter mechanism, in such a manner that the at least one measuring tube executes forced mechanical oscillations having at least one wanted frequency, namely an oscillation frequency predetermined by the electrical driver signal, and, in a second operating mode (II), to cease generating the electrical driver signal, in such a manner that then no electrical power is supplied by the drive electronics to the exciter mechanism. In the case of the Coriolis mass flowmeter of the invention, the transmitter circuit is, additionally, adapted to switch the drive electronics from the operating mode (I) into the operating mode (II), in such a manner that the at least one measuring tube in the case of drive electronics located in the operating mode (II) e

The present disclosure relates to a vibration-type sensor for measuring the density and/or the mass flow rate of a medium, having at least one first oscillator, the sensor including: a curved first measuring tube; a curved second measuring tube; at least one first elastic vibration coupler that couples the first measuring tube and the second measuring tube to each; and at least one exciter for exciting oscillator vibrations in a bending vibration mode. The oscillator has a first oscillator resonant frequency for when the measuring tubes vibrate approximately in phase in the bending vibration mode and a greater second oscillator resonant frequency for when the measuring tubes vibrate approximately in counterphase in the bending vibration mode. The first and second measuring tubes have resonant frequencies differing from their arithmetic mean by no more than 8%, no more than 4%, no more than 2% or no more than 1%.

A driver circuit comprises a signal generator having a frequency control input, an amplitude control input and a signal output, an end stage having a signal input and a load output, as well as an amplitude control with an amplitude input, an amplitude output and a voltage measurement input. The signal generator is adapted to output on its signal output an at least at times periodic, electrical, analog signal having a signal frequency predetermined by a frequency control value applied on the frequency control input and a voltage- and/or electrical current amplitude predetermined by an amplitude control value applied on the amplitude control input. The end stage is adapted to drive through an electrical circuit involving the load output a load current having an electrical current level dependent on a signal voltage and/or a signal current of an electrical input signal applied on the signal input as well as to provide on the load output a load voltage having a voltage level dependent on the electrical current level of the load current. Moreover, the amplitude control is adapted, recurringly, to ascertain an amplitude deviation between an amplitude-actual value presiding on the amplitude input and an amplitude desired value. Additionally, the amplitude control is adapted, recurringly, to ascertain an indicator value, which signals whether a magnitude of a measurement voltage applied on the voltage measurement input is too high, namely whether the magnitude of a threshold value has been exceeded, and, with application of the indicator value, to ascertain an amplitude control value, in such a manner that in the case of a too high magnitude of the measurement voltage sequentially following amplitude control values of the amplitude control sequence are lessened, as well as to output on the amplitude output an amplitude control sequence of time sequentially calculated, amplitude control values. The signal output of the signal generator is, in turn, electrically connected with the signal input of the end stage and its load output is electrically connected with the voltage measurement input of the amplitude control. Moreover, the amplitude output of the amplitude control is electrically connected with the amplitude control input of the signal generator.

A mass flow sensor assembly for a mass flow controller or a mass flow meter comprises a mass flow sensor comprising a capillary tube held by a first corner support and a second corner support formed separately from each other. The capillary tube comprises a sensor portion which is located between the two corner supports, and wherein the two corner supports each have an arc-shaped groove in which the capillary tube is partially received. In addition, a method of manufacturing a mass flow sensor assembly is described.

A Coriolis mass flow measuring device and/or density measuring device, comprising: at least two measuring tubes which extend mirror symmetrically to a first mirror plane; at least one exciter mechanism and at least one sensor arrangement for exciting and registering measuring tube oscillations; two terminally located collectors for joining the measuring tubes; a support body for connecting the collectors; and a number of plate-shaped couplers for pairwise connecting of the measuring tubes for forming an oscillator. The measuring tube centerlines of the measuring tubes have two oppositely bent sections and an intermediately lying straight section. The second bent section is arranged on the side of the straight section away from the second mirror plane. The projection of the measuring tube centerline between the intersection with the second mirror plane and the transition between the straight section and the second bent section onto the second mirror plane is not less than the separation between the second mirror plane and the measuring tube centerline at the transition between the straight section and the second bent section, wherein the first bent section has stiffening element, which annularly grip around the measuring tube.

An aspect ratio flow metering device may comprise a concentrate inlet portion, one or more restricted flow portions of tubing fluidly connected to the concentrate inlet portion, and a metered concentrate outlet portion fluidly connected to the one or more restricted flow portion of tubing. The narrowest part of the one or more restricted flow portions of tubing may each have a length (R.sub.L): inner diameter (R.sub.ID) ratio of at least 10:1. The metered concentrate outlet portion may have an inner diameter (O.sub.ID) greater than R.sub.ID. The concentrate inlet portion may have an inner diameter (I.sub.ID) greater than R.sub.ID. The aspect ratio flow metering device may be structurally configured to limit flow of a concentrate into a hydrodynamic mixing apparatus. Also disclosed are methods for using the aspect ratio flow metering device to mix fluids.

A vibratory measuring device for determining a mass flow rate or a density of a flowable medium comprises: a vibratory measuring tube which is curved when in the idle position thereof; a support body; a first bearing body on the inlet side; a second bearing body on the outlet side; two exciter units and two sensor units; and an operation and evaluation circuit. The bearing bodies are connected to the support body, wherein the measuring tube is supported on the bearing bodies in such a way that flexural vibration modes of the measuring tube have vibration nodes on the bearing bodies, wherein the exciter units are each configured, according to excitation signals, to excite flexural vibrations of the measuring tube both in the measuring tube plane and perpendicular to the measuring tube plane, wherein the sensor units are each configured to detect flexural vibrations of the measuring tube both in the measuring tube plane and perpendicular to the measuring tube plane and to output vibration-dependent sensor signals, wherein the operation and evaluation circuit is configured to output excitation signals to the excitation units for the selective excitation of flexural vibration modes and to receive the sensor signals of the sensor units.

A Coriolis mass flow meter, comprising a housing with an inlet and an outlet for a fluid medium, which are arranged along a flow axis, two measuring tubes configured to allow the fluid medium to flow through them in a flow direction and arranged between the inlet and the outlet and having a measuring tube circumference on their external surface, a fixing element which connects the two measuring tubes in the region of the inlet and/or the outlet in such a manner that they are fixed in position relative to one another, wherein the fixing element includes a first connecting member and a second connecting member connected to both measuring tubes, and wherein each of the connecting members rests against the measuring tubes in such a manner that a part of the measuring tube circumference of each measuring tube remains free.