The Coriolis flowmeter according to the present disclosure includes: a measuring sensor including a bent measuring tube mirror-symmetrical with respect to a transverse plane, wherein a measuring tube center line runs in a longitudinal plane oriented perpendicular to the transverse plane, wherein an equatorial surface runs perpendicular to the longitudinal plane along the measuring tube center line; an exciter for exciting measuring tube bending vibrations; a first pair of vibration sensors for capturing the bending vibrations of the measuring tube; and an operating and evaluation circuit for driving the exciter, for capturing signals from the vibration sensors, and for determining a mass flow measured value, wherein the measuring sensor has a second pair of vibration sensors, which are arranged in a mirror-symmetrical manner with respect to the transverse plane, wherein the first pair of vibration sensors is separated from the second pair of vibration sensors by the equatorial surface.

The invention relates to a method for ascertaining a flow parameter of a medium, in particular the mass flow rate, using a Coriolis flow meter of a specified measurement device type and to a device which is suitable for said method. According to the method, the medium, which has a medium viscosity, flows through at least one measurement tube piece that is mechanically vibrated by a respective excitation signal, at least one measurement signal dependent on the flow parameter, in particular a phase shift, is ascertained in the vibration behavior of the respective measurement tube piece, and the flow parameter is determined from the at least one measurement signal while taking into consideration the dependency of the flow parameter on the medium viscosity, wherein a data field which is ascertained using an interpolation method, in particular a kriging method, and which indicates the dependency of the flow parameter on the medium viscosity is used in order to determine the flow parameter.

A method for compensating the influence of at least one of the parameters from the group consisting of flow rate, viscosity, density and Reynolds number of a fluid to be measured on the measured flow rate and/or density of this fluid in a Coriolis mass flow meter with the aid of an equation using the parameters of the current Reynolds number of the fluid to be measured in the Coriolis mass flow meter, the maximum compensation value for Reynolds numbers approaching zero, the Reynolds number at which the curve of the compensation value has the largest slope, and the slope of the curve of the compensation value at the point Re.sub.c. Moreover, the invention relates to a Coriolis mass flow meter with a control device for carrying out the method.

The invention relates to a micro-Coriolis mass flow sensor, comprising a Coriolis tube having a fixed inlet and a fixed outlet, being fixed in tube fixation means, excitation means for oscillating the Coriolis tube about an excitation axis, detection means (8) for detecting, in use, at least a measure for movements of part of the Coriolis tube, characterized by the detection means (8) comprising one or more strain measurement devices (9, 11) configured for resistive readout being arranged in or on the Coriolis tube.

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 θ.sub.1 (704), a third substantially planar section (706c), a fourth substantially planar section (706d), and a fifth substantially planar section (706e).

The present invention relates to a method for monitoring state of a coil having at least two connection wires, which coil is part of an apparatus for determining at least one process variable of a medium in a containment, as well as relating to an apparatus for executing the method. The method, in such case, includes method steps as follows: ascertaining a desired-value of an ohmic total resistance for the coil and the connection wires, supplying the coil with an electrical excitation signal and receiving an electrical, received signal from the coil by means of the two connection wires, ascertaining an actual-value of the ohmic total resistance based at least on the received signal, and comparing the actual-value with the desired-value and ascertaining a state indicator based on the comparison.

A Coriolis mass flow meter comprises a transformer circuit configured to receive and analyze vibration measurement signals to determine mass flow measurement values which represent a mass flow of a fluid and to determine characteristic number values for at least one sensor characteristic number, which characterizes and/or is based on at least one harmonic component of at least one of the vibration measurement signals, wherein each vibration measurement signal includes a useful component, having a frequency corresponding to a drive frequency with an amplitude based on a respective magnetic flux through a respective vibration sensor of the flow meter, and a harmonic component having a frequency corresponding to a whole-number multiple of the drive frequency and an amplitude based on the respective magnetic flux.

Disclosed is a measuring sensor of a measuring device for detecting a mass flow rate. The measuring sensor comprises a measuring tube, a vibration exciter, and at least two vibration sensors. The vibration exciter and the vibration sensors each have a coil apparatus having at least one coil and at least one magnetic apparatus. The coil apparatus comprises a printed circuit board having at least one printed circuit board layer, wherein the coil is formed by means of an electrically conductive conductor track, wherein the coil is arranged on the first side and/or second side of a printed circuit board layer, wherein the printed circuit board comprises at least two contact-making elements for connecting the coil to an electronic measuring and/or operating circuit of the measuring device by means of connection elements, and is characterized in that at least one contact-making element has a hole.

A vibronic measurement sensor includes two measuring tubes for conveying the medium and two temperature sensors, each arranged on a surface portion of the measuring tubes, respectively, wherein: centroids of the two surface portions relative to an intersection line between a longitudinal plane of symmetry and the transverse plane of symmetry of the sensor are rotationally symmetrical to one another; the first centroid lies in a first section plane running perpendicular to a measuring tube center line of the first measuring tube, wherein an intersection point of the measuring tube center line with the first intersection plane is defined; and the first centroid is arranged relative to the intersection point of the measuring tube center line such that a measurement accuracy of the sensor is largely independent of the installation position, even when inhomogeneous temperature distributions are formed over measuring tube cross-sections at low Reynolds numbers.

The invention relates to a Coriolis measuring sensor for detecting a mass flow rate or a density of a medium flowing through a measurement tube of the Coriolis measuring instrument. The measurement tube has an inlet and an outlet designed to convey the medium between the inlet and the outlet; an exciter; and two sensors; the measuring sensor comprising a supporting element having a chamber designed to house the measurement tube at least in portions. The magnet device comprises a magnetically conductive holder for magnets and a first pair of magnets arranged on the holder on a first face of the coil device, with the magnets designed to cause a magnetic field perpendicularly to a cross-sectional plane of the coil, and the magnetic field of a first magnet of the pair is oriented so as to be opposite to the magnetic field of a second magnet of the pair.