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 meter electronics (20) for a flowmeter (5) configured to receive a process fluid is provided. The meter electronics (20) includes an interface (201) configured to communicate with a flowmeter assembly of the flowmeter (5) and to receive a vibrational response. The meter electronics (20) comprises a drive gain threshold determination routine (215) configured to determine a first predetermined drive gain threshold (302), monitor a drive gain signal over a predetermined time period, and determine lowest points in the drive gain signal over the predetermined time period. A second drive gain threshold is determined based upon reaching a predetermined number of instances of low points of the drive gain signal.

A system includes a tubular having an interior surface, a longitudinal axis, a flowbore, and a main portion having a first inner diameter. A vibration inducing feature is disposed along the interior surface of the tubular and is immovable with respect to the tubular, and has a second inner diameter within the tubular that is different than the first inner diameter. The feature has a beveled first end surface and a beveled second end surface, the beveled first and second end surfaces longitudinally displaced from each other. The feature is configured to increase turbulence within the flowbore and configured to dissuade a capture of objects passing therethrough. A sensing system includes a sensor arranged to detect vibration within flow passing the vibration inducing feature, and is configured to output a command signal in response to sensed data reaching a threshold value or indicative of a predetermined pattern.

A method for determining the gas portion in the medium flowing through a Coriolis mass flowmeter, wherein the Coriolis mass flowmeter has at least one measuring tube, at least one oscillation generator, at least two oscillation sensors and at least one control and evaluation unit, wherein the method is characterized in that the density value .sub.100 of the gas-free medium is determined in a .sub.100 step, that the density value .sub.mess of the medium flowing through the measuring tube is measured in a .sub.mess step, that a quantity GVQ for the gas portion of the medium flowing through the measuring tube is calculated in a GVQ step with the density value .sub.100 and the density value .sub.mess, and that the quantity GVQ is output for the gas portion of the medium flowing through the measuring tube.

The density measuring device serves for measuring density, , of a flowable medium and comprises a measuring device electronics (ME) as well as a measuring transducer (MT) electrically connected therewith. The measuring transducer includes a measuring tube (10), an oscillation exciter (41) for exciting and maintaining oscillations and an oscillation sensor (51) for registering oscillations of the at least one measuring tube. The measuring device electronics is adapted by means of an oscillation measurement signal (s.sub.1) as well as an exciter signal (e.sub.1) to adjust a drive force effecting wanted oscillations (namely oscillations with a predetermined wanted frequency, f.sub.N) of the measuring tube. The drive force is adjusted in such a manner that during a predetermined phase control interval a phase shift angle, .sub.N, by which a velocity response, V.sub.N, of the measuring tube Is phase shifted relative to a wanted force component, F.sub.N, of the drive force, is less than 20 and greater than 80, and/or the wanted frequency has a frequency value, which corresponds to greater than 1.00001 times, equally as well less than 1.001 times, a frequency value of an instantaneous resonant frequency of the measuring tube. Moreover, the measuring device electronics is adapted based on the oscillation measurement signal (s.sub.1) present during the phase control interval to ascertain at least one frequency measured value, X.sub.f, which represents the wanted frequency for the phase control interval, as well as also with application of the frequency measured value, X.sub.f, to generate a density measured value, X.sub., representing a density, .

A method of limiting a current drawn by two or more meter assemblies (10a,10b) is provided. The method includes driving a first meter assembly (10a) with a first drive signal, comparing one or more operating parameters of the first meter assembly (10a) to an operating threshold, and driving a second meter assembly (10b) with a second drive signal based on the comparison to prevent a current drawn by the first meter assembly 10a) and the second meter assembly (10b) from exceeding a current threshold.

Methods and apparatuses for delivering a process gas to a processing chamber are provided. A mass flow controller includes a first flow line for introducing a process fluid and an inlet valve disposed along the first flow line for controlling a flow rate of the process fluid. The mass flow controller includes a second flow line for introducing a carrier fluid into the mass flow controller and a micro-electro-mechanical system (MEMS) Coriolis sensor for providing a density signal and a mass flow rate signal for a mixture of the process fluid and the carrier fluid. The mass flow controller provided includes an outlet valve for controlling a mass flow rate of the mixture that is output by the mass flow controller as well as a controller for operating the inlet valve based on the density signal and for operating the outlet valve based on the mass flow rate signal.

A method for assembling a sensor assembly is provided. The method includes positioning one or more conduits within a case, and coupling one or more sensor components to the one or more conduits, with the sensor components including one or more of a driver, a first pick-off sensor, and a second pick-off sensor. A flexible circuit is positioned within the case, one or more sensor component flexures are coupled to extend from a body of the flexible circuit to a sensor component of the one or more sensor components.

A method is provided for determining fluid momentum through one or more conduits. The method comprises the step of receiving an elongation signal from an elongation sensor indicating an elongation of the one or more conduits due to the flowing fluid. A momentum term is then calculated.

A measuring transducer for registering and/or monitoring at least one process variable of a flowable medium guided in a pipeline, which at least includes: a housing module, which is mechanically coupled with the pipeline via an inlet end and an outlet end, and a sensor module having at least one measuring tube held oscillatably at least partially in the housing module and caused, at least at times, to oscillate. The at least one component of the housing module and/or of the sensor module is manufactured by means of a generative method and method for manufacturing at least one component of a measuring transducer, which method includes manufacturing the at least one component by means of a primary forming process, especially by means of a layered applying and/or melting-on of a powder, especially a metal powder, based on a digital data set, which gives at least the shape and/or the material and/or the structure of the at least one component.