A Coriolis measuring device for measuring volume flow or density of a medium flowing through a measuring tube is disclosed, the device comprising: the measuring tube for conveying the medium; at least one exciter, which is adapted to excite the measuring tube to execute oscillations; at least one sensor, which is adapted to register the oscillations of the measuring tube; an electronic measuring/operating circuit, which is adapted to operate the exciter as well as the sensor and to determine and to output flow and/or density measurement values; wherein the electronic measuring/operating circuit has an electronics board, wherein at least one exciter has a stationary exciter element, and/or wherein at least one sensor has a stationary sensor element, wherein at least one stationary exciter element and/or at least one stationary sensor element is integrated into the electronics board.

A measuring device includes a furnace, a draining vessel, a loader and a computing system for physical properties. The draining vessel with molten metal fluid is in the furnace. The loader accumulates the molten metal fluid from the draining vessel. The computing system includes a recording unit, transform unit, computing unit and processor. The recording unit records the vessel information. By the assumed physical parameters and the vessel information, the transform unit transforms a weight of the molten metal fluid in the loader into a first length criterion, and the computing unit simulates the flowing of the molten metal fluid to have a second length criterion. The processor minimizes the difference of the first and the second length criterion by changing the assumed physical parameters. The physical properties of the molten metal fluid are determined when the difference is minimized.

A measuring device includes a furnace, a draining vessel, a loader and a computing system for physical properties. The draining vessel with molten metal fluid is in the furnace. The loader accumulates the molten metal fluid from the draining vessel. The computing system includes a recording unit, transform unit, computing unit and processor. The recording unit records the vessel information. By the assumed physical parameters and the vessel information, the transform unit transforms a weight of the molten metal fluid in the loader into a first length criterion, and the computing unit simulates the flowing of the molten metal fluid to have a second length criterion. The processor minimizes the difference of the first and the second length criterion by changing the assumed physical parameters. The physical properties of the molten metal fluid are determined when the difference is minimized.

A sensor arrangement for detecting a density of harvested crops deposited as silage in a silo includes a source of a pressurized gaseous medium and an opening connected by a line to the source and which is movable along a surface of the silage. The gaseous medium is guided out of the opening from the source into the silage. The arrangement further includes a sensor for detecting a property of the medium flowing through the line, and an evaluation device connected to the sensor for providing an output signal containing information based on the signal of the sensor regarding the density of the silage.

A sensor arrangement for detecting a density of harvested crops deposited as silage in a silo includes a source of a pressurized gaseous medium and an opening connected by a line to the source and which is movable along a surface of the silage. The gaseous medium is guided out of the opening from the source into the silage. The arrangement further includes a sensor for detecting a property of the medium flowing through the line, and an evaluation device connected to the sensor for providing an output signal containing information based on the signal of the sensor regarding the density of the silage.

A mass flow controller assembly includes a housing defining a cavity, a plurality of internal passages, a first inlet, a first outlet, a second inlet, and a second outlet. A valve is connected to the housing, has an inlet fluidly coupled to the second outlet of the housing and an outlet fluidly coupled to the second inlet of the housing. The valve is configured to control fluid flow from the second outlet of the housing to the second inlet of the housing. A microelectromechanical (MEMS) Coriolis flow sensor is arranged in the cavity, includes an inlet fluidly coupled by at least one of the plurality of internal passages to the first inlet of the housing and is configured to measure at least one of a mass flow rate and density of fluid flowing through the MEMS Coriolis flow sensor. An outlet of the MEMS Coriolis flow sensor is fluidly coupled by at least one of the plurality of internal passages to the second outlet of the housing. The second inlet of the housing is fluidly coupled by at least one of the plurality of internal passages to the first outlet of the housing.

A mass flow controller assembly includes a housing defining a cavity, a plurality of internal passages, a first inlet, a first outlet, a second inlet, and a second outlet. A valve is connected to the housing, has an inlet fluidly coupled to the second outlet of the housing and an outlet fluidly coupled to the second inlet of the housing. The valve is configured to control fluid flow from the second outlet of the housing to the second inlet of the housing. A microelectromechanical (MEMS) Coriolis flow sensor is arranged in the cavity, includes an inlet fluidly coupled by at least one of the plurality of internal passages to the first inlet of the housing and is configured to measure at least one of a mass flow rate and density of fluid flowing through the MEMS Coriolis flow sensor. An outlet of the MEMS Coriolis flow sensor is fluidly coupled by at least one of the plurality of internal passages to the second outlet of the housing. The second inlet of the housing is fluidly coupled by at least one of the plurality of internal passages to the first outlet of the housing.

A density measurement reading of a medium is determined using a Coriolis mass flow transmitter with two oscillators with pairs of measuring tubes arranged one above the other in parallel flow and leading into collectors. The mounting of the transmitter in the pipeline causes mechanical voltages that influence the oscillators via the collectors. The method includes excitation of a vibration mode of the oscillators and a determination of the natural frequency of the excited vibration modes. The method also includes a determination of a preliminary density measurement reading based on the natural frequencies and a deviation between the preliminary density measurement readings. A corrected density measurement reading is determined using a model, which determines and corrects the influence of mechanical voltages on the density measurement based on the deviation.

A density measurement reading of a medium is determined using a Coriolis mass flow transmitter with two oscillators with pairs of measuring tubes arranged one above the other in parallel flow and leading into collectors. The mounting of the transmitter in the pipeline causes mechanical voltages that influence the oscillators via the collectors. The method includes excitation of a vibration mode of the oscillators and a determination of the natural frequency of the excited vibration modes. The method also includes a determination of a preliminary density measurement reading based on the natural frequencies and a deviation between the preliminary density measurement readings. A corrected density measurement reading is determined using a model, which determines and corrects the influence of mechanical voltages on the density measurement based on the deviation.

Method for continuous determining of fat content of milk having variable solids fractions and flowing with variable gas content in a pipeline, comprising: ascertaining a value for velocity of sound and an average density value for milk flowing in the pipeline based on eigenfrequencies of at least two bending oscillation wanted modes of measuring tubes of a densimeter arranged in the pipeline; ascertaining a value for static pressure in the pipeline by means of a pressure sensor connected to the pipeline; ascertaining a value for gas volume fraction based on the value for the velocity of sound, the value for the average density and the value for the pressure; ascertaining a value of density of milk flowing in the pipeline without gas content based on the value for the average density and based on the value for the gas volume fraction; ascertaining a value for permittivity of milk flowing in the pipeline based on at least one measuring of propagation velocity and/or absorption of microwaves in the milk by means of a microwave sensor arranged in the pipeline; and calculating fat fraction based on the value of the density of the milk flowing in the pipeline without gas content and the value for the effective permittivity.