A vibratory meter (5), and methods of manufacturing the same are provided. The vibratory meter includes a pickoff, a driver, and a flow tube (700) comprising a tube perimeter wall with: a first substantially planar section (706a), a second substantially planar section (706b) coupled to the first substantially planar section to form a first angle .sub.1 (704), a third substantially planar section (706c), a fourth substantially planar section (706d), and a fifth substantially planar section (706e).

An apparatus for measuring viscosities of fluids is described, comprising: a measuring system (1) having at least one measuring tube (5), which in measurement operation is filled with a fluid or through which fluid is flowing, and which has at least one tube section (4, 7) excitable to execute oscillations; an exciter system (1) for exciting at least two wanted oscillation modes of different frequencies, at each of which at least one of the tube sections (4, 7) is excited to execute oscillations, especially resonant oscillations; a sensing system (3), which is embodied in such a manner that it determines for the wanted oscillation modes excited in measurement operation, in each case, a frequency and a damping, especially a frequency, an amplitude and a damping, of a resulting oscillation of at least one tube section (4, 7) excited to execute oscillations of one of the wanted oscillation modes, and an evaluation system (15), which is embodied in such a manner that it determines based on calibration data stored in a memory (17) for the individual wanted oscillation modes excited in measurement operation, in each case, based on an excitation determined frequency and damping, especially frequency, amplitude and damping, of the resulting oscillation a measured shear rate value and a viscosity measured value, wherein the viscosity measured value corresponds to the dynamic viscosity of the fluid at a static shear rate corresponding to the shear rate value.

The invention relates to a measuring system comprising a measuring and operation electronic unit (ME) and a transducer device electrically coupled thereto. The transducer device (MW) has at least one tube, through which fluid flows during operation and which is caused to vibrate meanwhile, a vibration exciter (41), two vibration sensors (51, 52), on the inlet and outlet sides, respectively, for generating vibration signals (s1, s2), and two temperature sensors (71, 72), on the inlet and outlet sides, respectively, for generating temperature measurement signals (81, 82), said temperature sensors being coupled to a wall of the tube in a thermally conductive manner. The measuring and operation electronic unit (ME) is electrically connected to each of the vibration sensors (51, 52) and to each of the temperature sensors (71, 72) and also to the at least one vibration exciter (41). The measuring and operation electronic unit (ME) is designed to feed electrical power into the at least one vibration exciter (41) in order to effect mechanical vibrations of the tube (11) by means an electrical excitation signal (e1). Furthermore, the measuring and operation electronic unit (ME) is designed to generate a mass flow sequence (X.sub.m), namely a series of temporally successive mass flow measurement values (x.sub.m,i) representing the instantaneous mass flow rate (m) of the fluid, by means of each of the vibration signals (s1, s2) and each of the temperature measurement signals (1, 2) in such a way that, at least for a reference mass flow rate (m.sub.ref), namely a specified mass flow rate of a reference fluid flowing through the transducer device, the mass flow measurement values (x.sub.m,i.fwdarw.x.sub.m,ref) are independent of the temperature difference ().

A flowmeter (5) having a sensor assembly (10) connected to meter electronics (20) is provided. The sensor assembly (10) comprises at least one driver (104), at least one pickoff (105), and a conduit array (300). The conduit array (300) comprises a plurality of small conduits (302) therein that are configured to receive a process fluid, and further configured to selectably adjust the beta ratio of the flowmeter (5).

The measuring system comprises a transducer apparatus (MT) with two tubes (11, 12), each of which has a lumen (11) surrounded by a wall, especially a metal wall and extends from an inlet side end (11a, 12a) to an outlet side end (11b, 12b) Each of the two tubes is adapted to be flowed through by a fluid, starting from an inlet side end and proceeding toward an outlet side end, and, during that, to be caused to vibrate. An electromechanical-exciter mechanism formed by means of at least one oscillation exciter (41) serves for exciting and maintaining mechanical oscillations of each of the tubes (11, 12) about their associated static resting positions and a sensor arrangement (S) formed by means of at least one oscillation sensor (51) serves for registering mechanical oscillations of at least one of the tubes (11, 12). The transducer apparatus additionally includes two temperature sensors (71, 72), wherein the temperature sensor (71) is mechanically and thermally conductively coupled with a wall of the tube (11), and the temperature sensor (72) is mechanically and thermally conductively coupled with a wall of the tube (12), and wherein each of the temperature sensors (71, 72) is adapted to register a measuring point temperature (1, 2) and to convert such into a temperature measurement signal (1; 2). The temperature sensor (71) is additionally positioned closer to the end (11a) than to the end (11b), while the temperature sensor (72) is positioned closer to the end (12b) than to the end (12a). A measuring- and operating electronics (ME) of the measuring system electrically coupled with the transducer apparatus is additionally adapted, with application of the temperature measurement signals (1, 2), to generate a transducer temperature measured value, which represents a transducer apparatus temperature, which deviates both from the measuring point temperature (1) as well as also from the measuring point temperature (2), in such a manner that a magnitude of the transducer temperature measured value is greater than a magnitude of the measuring point temperature (1) and less than a magnitude of the measuring point temperature (2).

A sensor assembly (100, 300) for a vibratory conduit (130a, 330) is provided. The sensor assembly (100, 300) includes a sensor bracket (110, 310) having an outer surface (112, 312) substantially symmetric about an axis (S) and including a complementary portion (112c, 312c). The sensor assembly (100, 300) also includes a tube ring (120, 220, 320) having an outer surface (122, 222, 322) including a complementary portion (122c, 222c, 322c) affixed to the complementary portion (112c, 312c) of the sensor bracket (110, 310). The axis (S) of the sensor bracket (110, 310) is external of the vibratory conduit (130a, 330) when the tube ring (120, 220, 320) is affixed to the vibratory conduit (130a, 330).

A measuring system for measuring at least one measured variable of a flowing fluid, comprises a fluid supply line, a transducer apparatus, which has a tube and at least one other tube and is adapted to deliver at least one measurement signal corresponding to the at least one measured variable, a fluid return line, and a fluid withdrawal line. To open a first flow path, which leads from the lumen of the fluid supply line to the lumen of the tube, further to the lumen of the tube and further to the lumen of the fluid return line, equally as well not to the lumen of the fluid withdrawal line, and thereafter to allow fluid to flow along the flow path for the maintaining the temperature and/or for cleaning of parts of the measuring system and/or for conditioning fluid. It is, additionally, provided (instead of the first flow path) thereafter to open a second flow path, which leads from the lumen of the fluid supply line to the lumen of the first tube and, in parallel, to the lumen of the second tube and further from the lumen of the first tube, and from the lumen of the second tube, in each case, to the lumen of the fluid withdrawal line, as well as to allow fluid to flow along the second flow path. Moreover, it is provided, while allowing fluid to flow along the second flow path, in given cases, also while allowing fluid to flow along the first flow path, to generate at least one measurement signal, as well as to use the measurement signal for ascertaining measured values of the at least one measured variable.

A fluid line system comprises fluid lines (100, 200, 300, 400). Each of the two fluid lines (100, 400) has in each case one lumen (100*; 400*) which is enclosed by a wall, and extends from a flow opening (100a; 400a), located in a respective first line end (100+; 400+), of the respective fluid line both to a flow opening (100b; 400b) which is located in a line end (100#; 400#) of said fluid line (100; 400) and also as far as a flow opening (100c; 400c) which, spaced apart from said flow opening (100b; 400b), is likewise located in each case in the line end (100#; 400#) of said fluid line (100; 400). Each of the other two fluid lines (200, 300) in turn has a lumen (200*; 300*) which is enclosed by a wall and extends from a flow opening (200a; 300a) which is located in a line end (200+; 300+) of the respective fluid line (200; 300) as far as a flow opening (200b; 300b) which is located in a line end (200#; 300#) of said fluid line (200; 300), in such a way that a greatest flow section (A.sub.200,Max; A.sub.300,Max) of the respective fluid line (200; 300) is spaced apart both from its line end (200+; 300+) and from its line end (200#; 300#). Both the fluid line (200) and the fluid line (300) are connected by way of their line end (200+; 300+) in each case to the line end (100#) of the fluid line (100) and by way of their line end (200#; 300#) in each case to the line end (400#) of the fluid line (400). The flow openings (200a; 200b; 300a; 300b) form in each case one inlet-side and outlet-side flow cross section (A.sub.200a, A.sub.200b; A.sub.300a; A.sub.300b) of the respective fluid line (200; 300). In addition, the fluid lines (100, 200, 300, 400) are configured in such a way that an outlet-side flow cross section (A.sub.100,min; A.sub.100,min) of the fluid line (100; 400) which is located at the line end (100#; 400#) of the fluid line (100; 400) and adjoins both the flow opening (100b; 400b) and the flow opening (100c; 400c) of said fluid line (100; 400) and flow cross sections (A.sub.200a; A.sub.200b; A.sub.300a; A.sub.300b) overall fulfil the conditions: (I) and (II), and (III) and (IV).

A Coriolis mass flowmeter with a flange connection for connection to an external pipeline, with at least one oscillation generator, with at least two oscillation sensors, with at least two measuring tubes, with at least one flow divider, wherein the flow divider is arranged upstream of the at least two measuring tubes in the direction of flow, and with at least one flow collector, wherein the flow collector is arranged downstream of the at least two measuring tubes. The Coriolis mass flowmeter has at least an active measuring tube and at least a passive measuring tube being provided, the at least one active measuring tube and the at least one passive measuring tube are designed and arranged separately from one another and the at least one oscillation generator and the at least two oscillation sensors are arranged on the at least one active measuring tube.

A vibratory meter (5) including a multi-channel flow tube (130) is provided. The vibratory meter (5) includes a meter electronics (20) and a meter assembly (10) communicatively coupled to the meter electronics (20). The meter assembly (10) includes the multi-channel flow tube (130, 330, 430, 530) comprising two or more fluid channels (132, 332, 432, 532) surrounded by a tube wall (134, 334, 434, 534). The two or more fluid channels (132, 332, 432, 532) and tube wall (134, 334, 434, 534) comprise a single integral structure. A driver (180) is coupled to the multi-channel flow tube (130, 330, 430, 530). The driver (180) is configured to vibrate the multi-channel flow tube (130, 330, 430, 530). The two or more fluid channels (132, 332, 432, 532) and tube wall (134, 334, 434, 534) are configured to deform in the same direction as the single integral structure in response to a drive signal applied to the driver (180).