A U-shaped tube is used to measure the mass flow rate of the fluid using both thermal method and the Coriolis principle simultaneously. Two resistant coils are wound on the tube to do the thermal measurement and an excitation coil and two optical sensors are used to do the Coriolis flow measurement. It takes the advantages of both technologies and create a flow sensor which is super accurate, gas type insensitive, long-term stable and fast responsive without too much pressure drop.

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 vibronic sensor for monitoring a flowable medium, comprising: an oscillator to which a medium surrounding the oscillator can be applied; at least one electromechanical transducer for exciting the oscillator to mechanical vibrations in accordance with driver signals and/or for outputting transducer signals that depend on vibrations of the oscillator; an operating and evaluating unit for providing the driver signals for driving the electromechanical transducer, for capturing the transducer signals, and for determining the presence, the density, and/or the viscosity of the medium in accordance with the transducer signals, wherein the operating and evaluating unit is designed to detect whether the medium in the pipe has a flow velocity above a limit value on the basis of time-varying modifications of the transducer signals.

A disclosed mass flow meter/controller includes: a flow tube to direct a fluid from an inlet of the flow tube to an outlet of the flow tube; an actuator to cause a vibration in the flow tube; a light source to emit light; at least one beam splitter to split the light emitted by the light source into a first light beam and a second light beam; a first optical sensor to output first measurements of a first position of a first location on the flow tube based on detecting the first light beam; a second optical sensor to output second measurements of a second position of a second location on the flow tube based on detecting the second light beam; and control circuitry to determine a mass flow rate and/or a density of the fluid in the flow tube based on the first and second measurements.

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.

A fixing device for a flowmeter component is provided. It includes two fixing supports respectively fixed on two sides of the flowmeter component. Each fixing support is formed with a connecting arc, and the connecting arc is axisymmetric about a vertical direction. When the flowmeter component is a driver on a Coriolis mass flowmeter, the two fixing supports are fixed to two sides of the driver respectively, and the driver is fixed to flow tubes of the Coriolis mass flowmeter through the connecting arcs on the two fixing supports, to complete installation and fixation of the driver. This structure can make the connection stiffness of each the fixing support and the flow tube be symmetrical about middle plane of the flow tube, thereby avoid undesirable deformation caused by vibration in a working process of the flow tube, and improve zero-point stability and overall performance of the Coriolis mass flowmeter.

A field device of measuring- and automation technology, which field device meets requirements for operation in explosion-endangered environments. Safe operation of the field device in explosion-endangered environments is assured by a pluggable connector coupling for electrical coupling of different field device components. An essential feature of the pluggable connector coupling is a sealing element for spatial and gas-tight sealing of a contact region of contacting elements of the pluggable connector coupling from a free volume remaining in the pluggable connector coupling.

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.

The invention relates to a Coriolis measuring transducer (10) of a Coriolis measuring device (1) as well as to the Coriolis measuring device for registering a mass flow or a density of a medium flowing through at least one measuring tube of the Coriolis measuring device, comprising:

the at least one measuring tube (11) having an inlet (11.1) and an outlet (11.2) and adapted to convey the medium between the inlet and outlet;
at least one exciter (12), which is adapted to excite the at least one measuring tube to execute oscillations;
at least one sensor (13), which is adapted to register deflection of the oscillations of the at least one measuring tube;
wherein at least one exciter as well as at least one sensor have, in each case, a coil apparatus (14) with, in each case, at least one coil (14.1) as well as, in each case, a magnet apparatus (15), wherein the magnet apparatus and the coil apparatus are movable relative to one another,
characterized in that at least one exciter or at least one sensor has an integrated temperature measuring device (14.3) for measuring temperature of the exciter, or of the sensor, as the case may be.

An EMI resistant electronics enclosure (200) is provided having a first compartment (206) and a second compartment (207), each defined by a body (205), being separated by a septum (208). A first aperture (209) in the septum (208) connects the first compartment (206) and the second compartment (207). A feed-through element (210) is provided having a first interface region (211) and a second interface region (212), wherein one or more primary conductors (217) extend between the first interface region (211) and the second interface region (212), and wherein the first interface region (211) resides in the first compartment (206), and the second interface region (212) resides in the second compartment (207). A conductive bar (232) circumscribes at least a portion of the feed-through element (210), and a conductive gasket (220) extends from the body (205) to the conductive bar (232), wherein a ground path is formed between the body (205) and the conductive bar (232) with the conductive gasket (220).