A flow meter including a flow tube element with sensors configured to generate signals for measuring a fluid flow through the flow tube element. An electronics housing with a mounting side is releasably mounted to the flow tube element. The electronics housing accommodates a battery and electronics. The electronics and the sensors are powered by the battery, located in a battery cartridge that is arranged within the electronics housing and is removable through the mounting side with the housing unmounted from the flow tube element. A first anti-tampering element is arranged between a first part of the electronics and the battery cartridge. A second anti-tampering element is mounted to the flow tube element independently from the electronics housing. The second anti-tampering element and a second part of the electronics remain mounted to the flow tube element with the electronics housing unmounted from the flow tube element.

A method is provided for measuring density of a fluid by means of at least one at least sectionally curved measuring tube. The measuring tube is adapted to be flowed through by the fluid and concurrently to be caused to vibrate over a wanted oscillatory length, namely a tube length measured from a first tube end to a second tube end, a length which is greater than a minimum separation of the second tube end from the first tube end. According to the invention, among other things, also a tilt measured value representing an inclination of the at least one measuring tube in the static resting position relative to a local acceleration of gravity is ascertained, in such a manner that such represents an angle of intersection between a direction vector of an imaginary first reference axis (y-axis) and a direction vector of an imaginary second reference axis (g-axis). The first reference axis is so selected that it is perpendicular to an imaginary third reference axis (z-axis) imaginarily connecting the first tube end and the second tube end and points in the direction of a peak of the at least one measuring tube farthest from the third reference axis in the static resting position, while the second reference axis is so selected that it extends through a shared intersection of the first and third reference axes and points in the vertical direction, namely in the direction of the local acceleration of gravity. The tilt measured value is used together with a parameter measured value representing an oscillation frequency of the at least one measuring tube for ascertaining at least one density measured value representing the density of the fluid.

The Coriolis mass flowmeter comprises a measuring transducer having a vibration element, an exciter arrangement, and a sensor arrangement The flowmeter further includes an electronic transmitter circuit coupled with the exciter arrangement and the sensor arrangement. The transmitter circuit supplies power to the exciter arrangement to force mechanical oscillations having a wanted frequency. The sensor arrangement includes two electrodynamic oscillation sensors to convert oscillatory movements of the vibration element into an electrical signal having an alternating voltage having an amplitude dependent on the wanted frequency and on a magnetic flux of its oscillation sensor. The sensor arrangement includes a magnetic field detector adapted to convert changes of the magnetic field into a magnetic field signal having an amplitude dependent on a magnetic flux and/or an areal density of the magnetic flux. The transmitter circuit ascertains mass flow measured values and ascertains whether an external magnetic field is present.

A field device includes a detector and a converter communicative to the detector. The detector also may include, but is not limited to, a sensor, an analog-to-digital converter, and a first processor. The sensor may be configured to acquire an analog measurement signal. The analog-to-digital converter may be configured to convert the analog measurement signal to a digital signal. The first processor may be configured to convert the digital signal into a measurement value to generate a digital signal representing at least the measurement value. The converter may be configured to convert the digital signal representing at least the measurement value into an instrumentation signal to output the instrumentation signal. The detector may be configured to transmit the digital signal representing at least the measurement value and the analog measurement signal to the converter.

The present disclosure relates to a mass flow meter according to the Coriolis principle, comprising two measuring tube pairs which have different usage mode natural frequencies, an exciter for exciting flexural vibrations and a vibration sensor pair for detecting flexural vibrations; and comprising a circuit for driving the exciters and for detecting signals of the vibration sensors, for determining flow-dependent phase differences between the signals of the inlet-side and outlet-side vibration sensors and for determining mass flow measurement values based on the flow-dependent phase differences, wherein the circuit is configured to perform, when determining the mass flow measurement values based on the flow-dependent phase differences, a zero-point correction for the first measuring tube pair and/or the second measuring tube pair using signal amplitude ratios of the measuring tube pairs.

In accordance with example embodiments of the present disclosure, a method for determining parameters for, and application of, models that correct for the effects of fluid inhomogeneity and compressibility on the ability of Coriolis meters to accurately measure the mass flow and/or density of a process fluid on a continuous basis is disclosed. Example embodiments mitigate the effect of multiphase fluid conditions on a Coriolis meter.

A feed-through (300) is provided according to the invention. The feed-through (300) includes a body (305) including a passage (320), a plug (325) located in and substantially blocking the passage (320), one or more conductors (328) extending through the plug (325), and a reduced diameter region (313) located on an exterior surface of the body (305), with the reduced diameter region (313) being adapted to receive ends of one or more projecting fasteners (330) of a second component.

A method for reducing an error rate is provided. The method includes obtaining a first analog signal representing a first kinematic property of a first position with a sensor, obtaining a second analog signal representing a second kinematic property of the first position, digitizing the first analog signal into a first digital signal, and digitizing the second analog signal into a second digital signal. The method also includes combining the first digital signal and the second digital signal into a combined signal such that an error rate of the combined signal is less than an error rate of one of the first digital signal and the second digital signal.

A method for correcting a measured value of a measured variable with reference to a medium flowing through at least two measuring tubes, wherein each measuring tube is excited by an oscillation exciter to execute oscillations, and wherein the oscillations of each measuring tube are registered by oscillation sensors, wherein an electronic circuit monitors at least two of the following measured variables or, in each case, a measured variable derived therefrom: phase difference between measurement signals, resonant frequency, ratio of an oscillation exciter electrical current amplitude to a measuring tube oscillation amplitude, the method including: determining a plausibility; and, wherein upon failing a plausibility requirement of at least one of the measured variables, determining measured values of the measured variables of at least one, first/second measuring tube as a function of corresponding measured values of the measured variables of at least one, second/first measurement tube.

A meter electronics (20) having a notch filter (26) configured to filter a sensor signal from a sensor assembly (10) in a vibratory meter (5) is provided. The meter electronics (20) includes the notch filter (26) communicatively coupled to the sensor assembly (10). The meter electronics (20) is configured to receive the sensor signal from the sensor assembly (10), the sensor signal being comprised of a first component at a resonant frequency of the sensor assembly (10) and a second component at a non-resonant frequency and pass the first component and substantially attenuate the second component with the notch filter, wherein the first component is passed with substantially zero phase shift.