Abstract: An antenna arrangement for coupling high frequency electromagnetic waves into or out of a pipe-shaped hollow body includes two patch antenna elements that are located opposite one another and integrated in the pipe inner wall (5) of the hollow body (1), and have curved surfaces fitted to the curved longitudinal pipe inner wall of the hollow body (1). An apparatus for mass flow measurement includes at least two of such antenna arrangements axially spaced apart from one another in a conveyor pipe section.

Abstract: An electromagnetic flow meter is described having a pressure containing vessel or conduit through which the fluid to be metered is passed. The pressure containing vessel is formed of first and second sections which are made of respective materials having first and second magnetic permeabilities, such as stainless steel and carbon steel. A single magnetic field generating coil is provided adjacent the first section for generating a magnetic field across the pressure containing vessel.

Abstract: The invention relates to a device for detecting an amount while receiving and/or discharging a fluid having a gas portion comprising a measurement line for conducting the fluid, a flow measuring unit for the fluid, which is in fluid connection with the measurement line, a degree of filling measuring unit for the fluid, which is in fluid connection with the measurement line and which comprises an electrode arrangement for determining electrical properties of the fluid present in the measurement line, and an evaluation unit for determining the fluid amount conveyed which is in a signal connection with the degree of filling measuring unit and the flow measuring unit. According to the invention it is provided that the electrode arrangement of the degree of filling measuring unit has a plurality of electrode plates which form a plate stack in the region of the measurement line.

Abstract: An apparatus for measuring volume- or mass-flow of a medium in a pipeline. Included is a measuring tube, through which the medium flows in the direction of the longitudinal axis of the measuring tube; a magnet system, which is embodied in such a manner, that it produces a magnetic field passing through the measuring tube essentially transversely to the longitudinal axis of the measuring tube; at least one measuring electrode coupled with the medium, which is arranged in a bore in the wall of the measuring tube in a region lying essentially perpendicular to the magnetic field.

Abstract: A flowmeter, such as an inductive flowmeter, is disclosed which includes a measuring tube made of plastic or haivng at least one plastic lining. Exemplary embodiments can assess a measurement in a highly accurate and reliable manner, and measure further physical variables using a relatively simple design, wherein measuring devices can be directly connected to a flow measurement location. For example, at least one pressure and/or temperature and/or field sensor can be introduced into plastic material of the plastic measuring tube or the plastic lining.

Abstract: An analysis circuit in an electromagnetic flowmeter provides diagnostic operating conditions and identifies one or more of the diagnostic operating conditions for which the coil current is stable during a sample interval. A diagnostic operating condition is selected as a measurement operating condition as a function of a noise floor measurements of the electrode voltage.

Abstract: In a constant current circuit, a constant current is caused to flow through a resistor, thereby causing a constant voltage to occur across the resistor. This constant voltage is then superimposed on an output signal of an operational amplifier that is to be fed back to the drain of a field effect transistor, thereby maintaining the same potential in an AC manner between the output terminal of the operational amplifier and the drain of the field effect transistor. In this way, the gate and drain of the field effect transistor is caused to exhibit the same potential in an AC manner, so that no current will occur through the stray capacitance between the gate and drain of the field effect transistor. As a result, similarly to a case of using a feedback capacitor, the input impedance of the field effect transistor can be raised.

Abstract: There is described a tubular insert for a magnetic inductive flowmeter, a production method for such a tubular insert and a flowmeter. The tubular insert essentially comprises an electrically-insulating material, in particular, rubber, reinforced with a metal mesh, at least in a measuring section. The tubular metal mesh comprises one or more mesh sections, pre-prepared from sheet mesh by stamping, bending and welding butt edges running essentially parallel to the tube axis such as to form an essentially tubular metal mesh. The tubular metal grid is embedded in the electrically-insulating material passing therethrough and the electrically-insulating material essentially covers the inner and out surfaces of the tubular material. A robust, tubular insert is thus achieved, with a corresponding cheap production cost.

Abstract: An electromagnetic flow meter for measuring flow rate of a fluid passing therethrough includes a conduit defining a fluid inlet, a fluid outlet and a measuring section positioned between the inlet and the outlet. The flow meter also includes a single coil for generating a magnetic field across the measuring section and electrodes for detecting induced electrical potential due to the fluid passage. The flow meter also includes means for conditioning the flow through the measuring section. The combination of the single coil and the flow conditioning means provides a flow meter with a desired level of accuracy. The single coil and the electrodes may be arranged so that the integral of a weight function, which defines the sensitivity of the flow meter to fluid velocity through different parts of the measuring section, over the first half of a measuring section closest to the coil is between 0.4 and 1.3 times the integral of the weight function over the other half of the measuring section.

Abstract: The measuring tube of the in-line measuring device is lined internally with a liner. The liner is made of a polyurethane produced using a catalyst that contains metal-organic compounds. The metals that are brought into the liner and remain there are chemically, especially atomically, bonded to carbon chains formed in the liner. The in-line measuring device is thus especially suited for measuring drinking water.

Abstract: A flowmeter includes a measuring tube made of plastic or at least a plastic lining. The plastic measuring tube or the measuring tube internally lined with plastic is provided with a layer sequence of insulating plastic layers and conductive layers to comprehensively diagnose a state of performance of the flowmeter.

Abstract: An electrode assembly comprises a housing, an electrode, a retainer and a potting material. The housing has a first end and a second end, with the electrode extending from the first end of the housing to a process flow. The retainer is positioned about the electrode, inside the housing. The potting material fills voids between the first end of the housing and the second end of the housing, such that the potting material limits displacement of the electrode when the electrode head is subject to pressure from the process flow.

Abstract: A magnetoinductive flow meter has an electromagnet unit which is mounted on an outside periphery of a measuring tube. The electromagnet unit can include magnetic flux-concentrating means and electric coils for generating a magnetic field which is oriented substantially perpendicular to the direction of flow of a measuring medium which flows through the measuring tube. The magnetic flux-concentrating means of the electromagnet unit can include ferrite pole cores each respectively associated with each one of the electric coils. A single magnet yoke composed of an electric sheet material can be connected to each ferrite pole core. The magnet yoke can surround the electric coils jointly in a clip-like manner.

Abstract: A method for ascertaining volume- or mass-flow of a magnetically conductive medium flowing through a magneto-inductive, flow-measuring device having a predetermined nominal-diameter, wherein a periodically alternating, magnetic field is caused to pass through the flow-measuring device, the actual rise time, until a constant magnitude of the magnetic field is reached, is ascertained, the actual rise time is compared with a desired rise time ascertained in the case of flow of a reference medium through the flow-measuring device, and, on the basis of a difference between actual rise time and desired rise time, a measurement error is ascertained and the actually measured volume- or mass-flow of the magnetically conductive medium is so corrected, that the measurement error is canceled.

Abstract: There is described a tubular insert for a magnetically inductive flowmeter, a production method for said type of tubular insert and a flowmeter. The tubular insert is made of, essentially, an electrically-insulating material, in particular, rubber, which is reinforced by a tubular molding part made of a dimensionally stable plastic which is based on polymers, at least in a measuring section. The tubular molding part is embedded in the electrically-insulating rubber material by a press or casting method such that the electrically-insulating, rubber material essentially covers the inner surfaces of the tubular molding part. An economical to produce, robust, tubular insert is thus achieved.

Abstract: An apparatus for measuring and/or monitoring the flow of a medium to be measured, which is flowing through a measuring tube in the direction of the longitudinal axis of the measuring tube. The apparatus includes: A magnet arrangement which produces a magnetic field passing through the measuring tube and running essentially transversely to the longitudinal axis of the measuring tube; two measuring electrodes which are galvanically or capacitively coupled with the medium to be measured and which are arranged in such a manner that a measurement voltage is induced in them, evoked by the medium to be measured; an evaluation control unit, which, on the basis of the measurement voltage induced in the measurement electrodes, provides information concerning the volume flow of the medium to be measured in the measuring tube; wherein connecting lines, or signal lines, as the case may be, are provided, by way of which the measurement signals are led between the measurement electrodes and the control/evaluation unit.

Abstract: A measuring pipe obtained by applying an insulating resin lining to the inside of a nonmagnetic pipe is employed. A through hole reaching the resin lining is made in the sidewall of the nonmagnetic pipe, and a signal electrode and a guard electrode are arranged in the through hole. The through hole is filled with an insulating vibration absorbing member so as to cover the periphery of the signal electrode and the guard electrode. A gelatinous substance of silicon resin, or the like, is employed as the vibration absorbing member, but liquid such as oil may be employed to liquid seal the signal electrode and the guard electrode in the through hole. Consequently, the electromagnetic flowmeter can be formed compact and its production is facilitated.

Abstract: The present invention relates to a plastic ultrasonic measurement section (1) used for the flow measurement of fluids. It is equipped with two ultrasonic transmitting and receiving transducers (2, 3) spaced in the fluid flow direction and is characterized in that the sound is guidable in Z-shaped manner between the transmitting and receiving transducers (2, 3) by means of at least two reflectors (4). A description is given of a corresponding measurement method and a method for the one-piece production of a measurement section (1) by injection moulding.

Abstract: A measuring transducer including a measuring tube for conveying a fluid; a measuring electrode arrangement for registering electric voltages produced in the flowing fluid; as well as a magnetic field system situated externally on the measuring tube for producing a magnetic field at least partially passing through the measuring tube as well as the therein conveyed fluid during operation, for inducing an electric field in the flowing fluid, wherein the magnetic field system has at least one field coil, through which an electrical exciter current flows at least at times during operation. A coil holder is also including serving for holding the at least one field coil externally on the measuring tube, wherein the measuring tube and coil holder are connected joint-freely with one another, so that the coil holder is embodied as an integral component of the measuring tube.

Abstract: To ensure, with ease, airtightness of an internal cavity when connecting a shielded lead lines to the outside. Tubes are installed on the portions of shields of lead lines positioned at through passages of a packing. An adhesive agent is caused to flow between the tubes and the shields, to bond therebetween. Doing so maintains an airtight seal through the adhesive agent (an adhesive agent that is caused to penetrate the spaces in the meshes of the shields, and hardened therein) between the shields and the inner peripheral surfaces of the tubes of the lead lines through the inner peripheral surfaces of the through passages of the packing and the outer peripheral surfaces of the tubes of the lead lines being tightly sealed.

Abstract: The invention relates to an apparatus for measuring volume- or mass-flow of a medium (11) flowing through a measuring tube (2) in the direction of the measuring tube axis (3), and includes: A magnet system (6, 7; 17), which produces a magnetic field (B) passing through the measuring tube (2) essentially transversely to the measuring tube axis (3); at least one measuring electrode (4; 5), which contacts the medium (11) in a defined surface region; and a control/evaluation unit (8), which provides information concerning volume- or mass flow of the medium (11) in the measuring tube (2) on the basis of a measurement voltage induced in the at least one measuring electrode (4, 5); wherein at least the medium-contacting surface region of the at least one measuring electrode (4, 5) is manufactured of a chemically inert and electrochemically and mechanically resistant material.

Abstract: An in-line magnetic flow meter has an electrically insulated quasi-annular voltage sensing path defined between an internal wall of a meter body and an outer wall of an axially disposed hollow tube. Although less than 100% of the fluid flow passes through the sensing region, the choice of an inner tube reduces flow impedance introduced by the meter, when compared to other meters providing a quasi-annular sensing path. In addition, by forming two electromagnet coils on a single core and using axially separated pairs of electrodes, the present arrangement allows one to provide two flow meters in the space normally occupied by one.

Abstract: A measuring tube of the in-line measuring device is lined internally with a liner. The liner is made of a polyurethane produced using a catalyst that contains metal- organic compounds. The metals that are brought into the liner and remain there are chemically, especially atomically, bonded to carbon chains formed in the liner. The in-line measuring device is thus especially suited for measuring drinking water.

Abstract: An electromagnetic flow meter for measuring flow rate of a fluid passing therethrough includes a conduit defining a fluid inlet, a fluid outlet and a measuring section positioned between the inlet and the outlet. The flow meter also includes a single coil for generating a magnetic field across the measuring section and electrodes for detecting induced electrical potential due to the fluid passage. The coil may be arranged to surround a section of the measuring section over a segment angle of between 140 and 180 degrees. The electrodes may be positioned so that they are offset from being opposite each other on the centerline of the measuring section, by an offset angle of between 5 degrees and 45 degrees.

Abstract: Methods and apparatuses for detecting radial flows of conductive fluid are provided. In an embodiment of the present invention, shields are used to prevent or reduce circulating electrical currents from causing a voltage difference that would adversely affect the measured voltage difference between two adjacent electrodes. The shields may be a conduit through which conductive fluid may flow. Groups of sensors, e.g., two or more, may be placed within the shield. The shields may have any cross-section shape. Generally, once the circulating electrical current flow between the electrode pairs is substantially reduced or eliminated, only the voltage difference from the localized induced electric field remains. This way, a true induced voltage may be measured, and thus an accurate value for the fluid velocity may be determined.

Abstract: Methods and systems are described for determining a flow rate of a gas-liquid fluid mixture in a conduit. In the described systems and methods, the fluid mixture is conditioned so that the liquid in the mixture is separated from the gas in the mixture. Properties of the conditioned flow may then be measured to determine the flow rate. In an embodiment of the invention, the hold up of the separated liquid is measured; the velocity of the separated liquid is measured; the velocity of the separated gas is measured; and the flow rate of the gas-liquid fluid mixture is determined from the hold up and the velocities.

Abstract: An electromagnetic flowmeter is equipped with a pipe unit including a pipe through which a fluid to be measured flows, a pair of electrodes adhered to the pipe, and substrate holders that retain substrates therein and which are disposed so as to cover the electrodes. In addition, the pipe unit is accommodated inside a body through a first opening, which opens on one side of the body. A solenoid unit including coils is installed on the pipe unit after being inserted into the interior of the body through first and second openings.

Abstract: Disclosed is a method for operating an electromagnetic flowmeter and a flowmeter. A measuring tube provided with a coil arrangement for producing a magnetic field at right angles to the direction of flow. The direction of current flow in the coil arrangement is altered periodically, and the current is kept essentially constant in one period after a rise to a predetermined value. the voltage applied to the coil arrangement and/or its derivative is determined and compared with an associated reference value. If this voltage or derivative does not fall below the reference value in a desired minimum time within a measurement period, an error message can be emitted in order to indicate a fault. If the voltage or derivative falls below the reference value, it is ensured that the magnetic field is sufficiently stable and measured values for a voltage which can be tapped off at measurement electrodes.

Abstract: A magnetic flow meter has an electrically insulating member extending inward from an inner wall of a flow tube and extending along a selected axial portion of the tube. At least one pair of electrodes are placed adjacent opposite sides of the insulating member at a selected axial position so as to define a voltage sensing path. At least one of the electrodes is connected to an adjustment mechanism that allows the electrode to be set at a selected radial position, where the position can be selected so that the sensed voltage varies linearly with volumetric flow rate.

Abstract: An industrial process sensor having a sensor component exposed to process fluid detects when the sensor performance has been degraded by a sensor coating buildup from the process fluid. A baseline statistical metric, such as standard deviation of the process parameter sensed by the sensor, is determined during an initial operating period when the sensor component is clean. During continued operation of the sensor, the statistical metric is continually updated and monitored. An alarm output indicating that sensor coating has degraded sensor performance is produced when the current value of the statistical metric varies from the baseline value by an amount indicating degraded sensor performance.

Abstract: The invention related to a flow meter for measuring the flow rate of a fluid flowing in a pipe according to the magnetic-inductive method. To this end, the flow meter comprises the pipe itself as well as an electrode arrangement integrated in the pipe and a magnetic system also integrated in the pipe for generating the measuring/magnetic field.

Abstract: A magneto-inductive flow measuring device providing, in addition to flow information for a medium, also information concerning electrical conductivity of the medium. For a highly accurate determination of the electrical conductivity, the invention provides the following solution: a temperature measuring unit is provided, which makes available information concerning the temperature of the medium. On the basis of the measured temperature, a control/evaluation unit ascertains a correction value for electrical conductivity and makes available a correspondingly corrected value for the electrical conductivity.

Abstract: The disclosure relates to a method for operation of a flow measurement device, and to a flow measurement device itself. In order in this case to record the conductivity of the medium or faults resulting from deposits by means of a measurement tube configuration in a technically simple manner, a total of at least 4 electrodes are arranged distributed on the circumference of the measurement tube, in the measurement tube. When a signal is fed in at one of the electrodes or at an electrode pair, an electric current is measured between one electrode pair, while an electrical voltage is measured between another electrode pair. An impedance value is determined from the two measured values, from which impedance value a conductivity of the medium is determined and/or in comparison of different conductivities or in comparison with historical values, it is deduced that there is a covering layer on the electrodes.

Abstract: Methods and apparatuses for detecting radial flows of conductive fluid are provided. In an embodiment of the present invention, shields are used to prevent or reduce circulating electrical currents from causing a voltage difference that would adversely affect the measured voltage difference between two adjacent electrodes. The shields may be a conduit through which conductive fluid may flow. Groups of sensors, e.g., two or more, may be placed within the shield. The shields may have any cross-section shape. Generally, once the circulating electrical current flow between the electrode pairs is substantially reduced or eliminated, only the voltage difference from the localized induced electric field remains. This way, a true induced voltage may be measured, and thus an accurate value for the fluid velocity may be determined.

Abstract: A magnetic flow meter employs resonant circuit principles to increase the strength of the magnetic field to produce larger electrode difference potentials so that environmental influences have less effect on the operation of the flow meter. The flow meter may use an electromagnet that is resonant with a capacitor, generally at a frequency on the order of ten kHz. In addition, the meter comprises a magnetic field sensor and timing circuits that can sample the electrode difference potentials when the field is at a maximum and the time rate of change of field is instantaneously zero. Some versions of the meter operate in a one-shot mode and others operate with a burst of drive pulses.

Abstract: The flow responsive voltages detected at the electrodes of magnetic flow meters are typically reduced in magnitude by an electrical impedance shunting effect of the fluid on the electrodes. This problem is resolved by providing buffering electrodes located near, and preferably both upstream and downstream, of flow responsive sensing electrodes. The buffering electrodes are driven by amplifiers having signals detected by the flow responsive electrodes as an input. Thus, fluid in the vicinity of the flow responsive electrodes is forced to acquire an offset voltage which can reduce the shunting effect to a negligible level.

Abstract: A measurement device comprises: a container 1 including an aperture 6a; a lining 2 applied to an inner surface of the container 1; an electrode 3 provided in the aperture, and a spring 7 biasing the electrode 3 in a direction from the inside to the outside of the container 1. The electrode 3 includes: an electrode head 3a; an anchor 4 formed on an outer peripheral portion of the electrode head 3a; an electrode shaft 3b formed integrally with the electrode head 3a; and an electrode tapered portion 5 tapered with its diameter gradually reduced from the anchor 4 to the electrode shaft so as to fit in the aperture. The electrode 3 is inserted from the inside of the container 1 so as to expose a part of the electrode shaft 3b out of the container 1.

Abstract: A flange adapter for interfacing two different diameters of piping is provided. This flange adapter allows for the integration of a component, such as a magmeter, having a narrower diameter into a system. Such a flange adapter allows for a simple seamless weld that provides relatively smooth interior walls within the system so as to maintain the integrity of the chemical or biochemical processes taking place within the system.

Abstract: Problems of instability and non-linearity in probe-type magnetic flow meters are ameliorated by either or both of a conductor coating connecting a tip portion of the probe with a supporting probe stem and either a shrouding arrangement or skewed end plates parallel to the flow direction that are arranged adjacent to the sensing electrodes and that act to straighten and confine fluid flowing past the electrodes.

Abstract: A flow meter filter system (200) according to an embodiment of the invention includes a noise pass filter (203) configured to receive a first version of a flow meter signal and filter out the flow meter data from the flow meter signal to leave a noise signal, a noise quantifier (204) configured to receive the noise signal from the noise pass filter (203) and measure noise characteristics of the noise signal, a damping adjuster (205) configured to receive the noise characteristics from the noise quantifier (204) and generate a damping value based on the noise characteristics, and a filter element (206) configured to receive a second version of the flow meter signal and receive the damping value from the damping adjuster (205), with the filter element (206) being further configured to damp the second version of the flow meter signal based on the damping value in order to produce a filtered flow meter signal.

Abstract: An electromagnetic flowmeter includes: a measurement pipe to which a magnetic pole core is fixed while having a gap between a tip end portion of the magnetic pole core and the measurement pipe; a lining member for covering an inner wall surface of the measurement pipe and the gap; and a locking portion for locking the lining member, the locking portion being provided in a vicinity of the gap.

Abstract: A flow measurement device 100 is provided that includes an electrode terminal chamber 102 with an inlet 104 in communication with a flow channel 108 for receiving fluid and viscoelastic material aspirated from a surgical site, and an outlet 106 that tapers into a flow channel 108. The outlet 108 has a taper angle that is sufficient to smooth flow and cause viscoelastic material entering the electrode terminal chamber 102 to flow substantially within a center portion of the chamber and through the outlet 106. The electrode terminal chamber 102 further includes first and second electrode terminals 130 and 140 disposed on generally opposite sides of the electrode terminal chamber 102 in a spaced-apart manner. The first and second electrode terminals 130 and 140 are positioned a distance from the center of the chamber 102 that is sufficient to substantially avoid contact between the terminals and viscoelastic materials flowing through the chamber 102.

Abstract: Systems and methods are directed to method and device operating a flow meter. The flow meter including electrodes which can be used to feed a signal into fluid to be measured. A signal E1i in the form of a current or a voltage is applied to at least one first electrode. A response signal is measured at another electrode E2i which does not receive the signal or is not currently activated, to record a diagnosis the flow meter and the changes in the consistency of the flowing medium at any time during measurement operation. Impedances are determined and/or voltage(s) and/or current(s) are measured, wherein these values are set in comparison/ratio with previous values and the status of the device and/or of the measurement medium is deduced both qualitatively and quantitatively.

Abstract: An apparatus for measuring flow of a medium through a measuring tube directed along a longitudinal axis of the measuring tube.

Abstract: The disclosure relates to a method for measuring a flow rate, in particular in an inductive flowmeter, in which an electrical signal is applied to a measuring medium flowing in a measuring tube at electrodes, and the response function at measuring electrodes is determined as a measure of the flow rate, and to a corresponding flowmeter device. So that the flow effects of gas bubbles and/or particles in the measuring medium can be distinguished from other faults and the determination of the flow rate is thus more reliable, the disclosure proposes that, in order to detect gas bubbles and/or particles in the measuring medium, a magnetic and/or electric field is applied to the latter and the potential and/or current is/are read out at one or more electrodes, the signal profile A(t), together with its signal-to-noise component, is measured electronically as a function of the time, and a statistical evaluation is used to infer the existence of gas bubbles and/or particles.

Abstract: The measuring tube of an in-line measuring device is formed by means of a support tube and a liner internally lining the support tube. The liner adheres to the support tube, with interposition of a mediating primer. Both the primer and the liner are composed, at least in part, of polyurethane. Especially, both the polyurethane of the liner and also the polyurethane of the primer are suitable for drinking water applications, so that the in-line measuring device itself is also suited for measuring drinking water.

Abstract: The measuring tube of the in-line measuring device is formed by means of a support tube and a liner internally lining the support tube. The liner adheres to the support tube, with interposition of a mediating primer. Both the primer and the liner are composed, at least in part, of polyurethane. Especially, both the polyurethane of the liner and also the polyurethane of the primer are suitable for drinking water applications, so that the in-line measuring device itself is also suited for measuring drinking water.

Abstract: The invention relates to a special electrode surface for electrodes of a flow measuring device. In order to provide more measurement reliability for abrasive substances to be measured, for example in multiphase substances to be measured, according to the invention the size of the active electrode surface (3) is optimized independently of the size of the electrode (2) to be sealed in by means of a coating (4) so that an electrically nonconductive coating leaves free only the electrically active surface (3).

Abstract: An electromagnetic flowmeter assembly is described in which an excitation field is set up across a flow conduit and electrodes are used to sense the electromagnetic field generated across the flow conduit as a result of interaction between the excitation field and fluid flowing along the flow conduit. The signals obtained from the electrodes are processed, together with stored calibration data, by processing circuitry to determine flow measurements and means is provided for dynamically updating the calibration data.

Abstract: A magnetic flow transmitter includes a calibration converter that performs a calibration calculation routine to produce a calibration constant that couples to a flow converter. A data set input couples a flowtube data set that is associated with a unique flowtube to the calibration converter. A data table associates multiple flowtube data sets with multiple calibration calculation routines. The data table couples a calibration calculation routine that is unique to the flowtube data set to the calibration converter.