A measuring device for determining the density, the mass flow and/or the viscosity of a gas-charged liquid includes an oscillator, having a media-conducting measuring tube and two vibrational modes having media-density-dependent natural frequencies; an exciter for exciting the two vibrational modes; a vibrational sensor for detecting vibrations of the oscillator; and an operating and evaluating circuit to apply an excitation signal to the exciter, detect signals of the vibration sensor, determine current values of the natural frequencies of the two vibrational modes of the oscillator and fluctuations of the natural frequencies. The operating and evaluating circuit is designed to determine a first media state value, wherein the operating and evaluating circuit is furthermore designed to determine a second media state value which represents a gas charge of the medium.

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).

A process monitoring device includes: a measuring tube arrangement including a measuring tube; a receptacle module including a receptacle, wherein the measuring tube module is insertable into the receptacle and releasably mechanically connectable to the receptacle module; and a system for biotechnological applications, wherein the system includes a housing with a wall delimiting an interior, the wall having a cover with an opening, wherein the receptacle extends through the opening into the interior in a receiving direction, wherein the receptacle module is arranged in the opening that the receiving direction has a vector component opposite to the direction of gravity, such that a dead volume in the measuring tube and/or in a distributor piece which is attached to the measuring tube, when the measuring tube module is empty, is less than 20%.

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 method for detecting a deviation in a flow meter parameter of a flow meter that is adapted to measure a fluid flow rate is provided. The method comprises measuring a differential pressure across at least a portion of the flow meter. The method further comprises comparing the measured differential pressure to an expected differential pressure; the expected differential pressure being based on the measured flow rate. The method further comprises detecting a deviation in the flow meter parameter if the difference between the measured differential pressure and the expected differential pressure exceeds a threshold limit.

A method for calculating a fluid parameter of a fluid flowing through a vibratory flow meter is provided. The method comprises vibrating the flow meter at one or more frequencies and receiving a vibrational response. The method further comprises generating a first fluid property and generating at least a second fluid property. The method further comprises calculating a fluid parameter based on the first fluid property and the at least second fluid property.

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 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 two tubes (11, 12), through which fluid flows during operation and in the process are caused to vibrate, a vibration exciter (41), two vibration sensors (51, 52), on the inlet and outlet sides, respectively, for generating vibration signals (s1, s2), and an inlet-side temperature sensor (71) coupled to a wall of the tube (11) for thermal conduction and an outlet-side temperature sensor (72) coupled to a wall of the tube (12) for generating temperature measurement signals (1, 2). 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 of 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 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.

Provided is a Coriolis flow sensor assembly that includes a flow tube configured to provide a flow path through the flow tube. Further, the Coriolis flow sensor assembly includes a mechanical drive assembly configured to drive an oscillation of the flow tube while fluid is flowing via an oscillation surface. The Coriolis flow sensor assembly includes an interface fixedly coupled to the oscillation surface of the mechanical drive assembly and configured to receive the flow tube.