Abstract: A plastic is manufactured on the basis of at least four starting components (A, B, C, F) of which at least a first primary component (A) and a second primary component (B) can react with one another. A chemical reaction of the two primary components (A, B) is accelerated in such case by addition of at least one secondary component (C) serving as a catalyst. Additionally, according to the method, a tertiary component (F) serves as a filler, especially a color-giving filler. Initially a first multicomponent system (BF; CF; BCF), especially also a storable system, serving as an intermediate component, is formed, which contains, at least in part, both the secondary component (C) as well as also the tertiary component (F). Additionally, on the basis of the first multicomponent system (BF; CF; BCF) a flowable, especially liquid, second multicomponent system (ABCF) is formed, which contains the four starting components (A, B, C, F) in concentrations enabling the chemical reaction of the primary components (A, B).

Abstract: A magnetic-inductive flow meter including a measuring tube, a magnetic circuit device, and two electrodes for detecting a measurement voltage. The measuring tube includes an inflow section, a measurement section that adjoins an inflow section, and an outflow section that adjoins the measurement section. A flow cross section of the measurement section is smaller than an inlet-side flow cross section of the inflow section and smaller than an outlet-side flow cross section of the outflow section. The electrodes are located on or in opposite electrode sections in the measurement section.

Abstract: An electromagnetic flowmeter comprises a measuring pipe through which fluid to be measured flows, an electrode provided therein, an exciting unit, a signal line, a signal conversion unit that extracts a ?A/?t component that results from a change in the magnetic field from a resultant electromotive force of an electromotive force of the ?A/?t component; and an electromotive force of a v×B component that results from a flow speed of the fluid, wherein the resultant electromotive force is detected by the electrode and the signal line; and a flow rate output unit that eliminates, based on the extracted ?A/?t component, a variation factor as to a span that is a coefficient applied to a magnitude V of a flow speed of the v×B component in the resultant electromotive force so as to calculate a flow rate of the fluid.

Abstract: A magnetic-inductive flow meter is provided that includes a pressure-resistant plastic housing that includes an inlet port, an outlet port, and an intermediate measuring unit that has a duct wall and a measurement duct through which the fluid to be measured flows. Two opposite measuring electrodes are arranged in the duct wall and are oriented perpendicular to the magnet poles. Taking into account the maximum admissible pressure for the selected plastic, the duct wall is reduced to a minimum admissible thickness in the region of the magnet poles. An internal reinforcement cage that includes at least two internal transverse bulkheads and at least two internal longitudinal ribs stabilizes the duct wall. An external reinforcement cage that includes at least two first external longitudinal ribs retains and stabilizes the internal reinforcement cage and connects the measuring unit in a tension-proof manner to the inlet port and the outlet port.

Abstract: A wriggler device is provided for a gas meter endpoint or gas meter index as an interface with a gas meter drive mechanism. In general, the wriggler may include a base surface, at least one interface wall, and at least one guide wall. The base surface has a peripheral edge and a center point. The interface wall extends at an interface angle from the base surface, and may have an interface surface and a tip portion, with the tip portion spaced from the base surface. The at least one guide wall may extend between the base surface and the tip portion, and may have a guide surface. The guide wall may be configured to guide the drive mechanism along the guide surface to the base surface. Engagement of the interface surface by the drive mechanism causes the wriggler to rotate.

Abstract: An electromagnetic flowmeter includes at least one electromagnet coil arranged outside a liquid flow passage for generating an electromotive force in the liquid flow, and at least one pair of electrodes adjustably extending within the liquid flow for generating a velocity component signal. Preferably, two collinearly arranged coils are provided externally on opposite sides of the liquid flow passage, and a first set of two orthogonally-arranged pairs of coplanar electrodes are mounted on an adjustable probe strut that extends into the liquid flow. For greater accuracy, a Hall-effect device is provided on the probe. Additional sets of electrode pairs may be secured to the strut in planes parallel to the first electrode set. A second pair of collinear coils may be mounted externally of the liquid passage and orthogonally relative to the first coil pair, the two pairs of coils being alternately energized to produce three orthogonally arranged velocity components.

Abstract: A measuring device (1) is provided for measuring the flow rate of a medium (5) flowing through measuring tube (3). The measuring device (1) contains means for generating a constant magnetic field (B) perpendicular to the flow direction (v) of the medium (5) and at least two decoupling regions (7, 7?) which are disposed in a plane (E) perpendicular to the flow direction (v) of the medium (5) on the wall (9) of the measuring tube (3). Each decoupling region (7, 7?) comprises an electrode (13, 13?) which has a non-metal porous layer (11) on the side facing the medium (5) and a measuring unit (19) for detecting a measuring signal. In the measuring device (1), the porous layer (11, 11?) comprises an oxidic and/or non-oxidic ceramic material.

Abstract: A process for fabricating an electromagnetic flow meter by encapsulating an electrode with a liquefied plastic. The electrode is fabricated out of an electrically conducting material and with at least a first circumferential indentation that runs orthogonal to the longitudinal expansion of the electrode. The electrode is positioned in a tool and encapsulated with a liquefied plastic, at least in sections, wherein the first indentation is encapsulated, at least in sections, with liquefied plastic.

Abstract: An electromagnetic flowmeter for measuring the flow of a medium through a measuring pipe, wherein the flowmeter includes first and second electrodes arranged on opposite sides of the measuring pipe and coupled electrically or capacitively to the medium. A common mode test signal is passed to the first and second electrodes. A third electrode is provided at the top of the measuring pipe for receiving a response signal in response to the test signal passed to the first and second electrodes. The flowmeter also includes a detection device for detecting whether the third electrode is in contact with the medium based on the response signal.

Abstract: The present invention provides a method of measuring the flow rate of an electrically conductive liquid in laminar flow and to an implementation measurement device that are easy to implement, simple to produce and compact. For this purpose, the invention provides a device for measuring the flow rate, comprising: a channel (1); a pair of electrodes (2a-2b); and at least one device (3) for measuring the voltage (V) between the electrodes (2a-2b) of said pair, an electrical double layer forming at the interface of each electrode with the conducting liquid. The device comprises means (4, 5) designed so that, when the conducting liquid is flowing through the channel, the flow velocity fields in the diffuse layers facing each electrode are different and so that the convective/diffusive charge equilibria of the electrical double layer at the interface of each electrode are different.

Abstract: An electrode for a magneto-inductive flow measuring device for determining volume flow of an electricity conductive medium flowing through a measuring tube. The measuring tube, or at least a portion of it which comes in contact with the medium, is not electrically conductive; wherein the electrode exhibits an electrode shaft and an electrode head. The electrode head contacts the medium, and the electrode shaft exhibits frustoconically shaped sealing lips arranged one after the other in the direction of the longitudinal axis of the electrode. The electrode shaft is pressed into a bore in the wall of the measuring tube. The maximum diameter of the sealing lip nearest the electrode head is greater than the diameter of the bore, and, at least in a part of the electrode shaft, the maximum diameter of any following sealing lip is greater than the maximum diameter of the preceding sealing lip.

Abstract: The invention relates to an means and method for monitoring the flow of a fluid. The invention relates to an electromagnetic flow meter and method for measuring the axial velocity profile of a conducting fluid. The conducting fluid may be a conducting single phase fluid or a conducting continuous phase of a multiphase fluid. The conducting fluid may have a uniform flow profile or a non-uniform flow profile. The electromagnetic flow meter and method measure the axial velocity profile of a conducting fluid by dividing the flow cross section into multiple pixels and determining the axial velocity of the conducting fluid in each pixel. Having. derived the axial velocity profile, the electromagnetic flow meter and method may further derive the volumetric flow rate of the conducting fluid. The electromagnetic flow meter and method may be suitable for measuring the axial velocity profile and optionally the volumetric flow rates of each phase of a multiphase fluid.

Abstract: A Coriolis mass flowmeter includes a vibrator configured to vibrate a measurement conduct line, an upstream sensor and a downstream sensor, which are placed at a certain distance in the measurement conduct line and are configured to detect the vibration of the measurement conduct line, a first effective value reception section configured to receive an effective value of the first signal, a second effective value reception section configured to receive an effective value of the second signal, a ratio computation section configured to receive the effective value of the first signal and the effective value of the second signal and to compute the ratio of both values, and an anomaly diagnosis section configured to make a comparison between the computed ratio and a certain value and to generate an alarm.

Abstract: An electromagnetic flowmeter comprises an exiting coil, and a signal electrode having an electrode section, an axis portion, a first member which has elasticity, a second member which is harder than the first member, and a ring shape dividing wall which is harder than the second member, wherein the first and second members and the ring shape dividing wall are inserted between a rear face of the electrode section and an inner circumference face of the measuring pipe, the axis portion is projected to an outer circumference face of the measuring pipe through a through hole, and a fastening member is fastened to the axis portion which projects to the outer circumference face of the measuring pipe so that the first member is sandwiched between the rear face of the electrode section and the inner circumference face of the measuring pipe so as to be elastically deformed.

Abstract: A magnetic flowmeter (8) for measuring the flow of a flowing medium having a measuring tube (1) with a cross section that changes along its length and preferably the cross section in the middle section of the measuring tube (1) is less than at the beginning and end of the measuring tube (1), preferably the cross section of the measuring tube (1) is rectangular in its middle section and wherein the housing (2) preferably has a circular cross section. The inlet section (5) of the measuring tube (1) is formed of two segments (5a and 5b), of which a first segment (5a), in terms of flow direction, has a cross section that increases in the direction of flow and a downstream adjoining second segment (5b) has a cross section that decreases in the direction of flow. Optionally, the outlet section (6) is similarly formed of two sections (6a, 6b).

Abstract: A measurement apparatus including a lining body and an electrode. The electrode includes an electrode head portion having a first surface to contact a measurement object and a second surface opposite to the first surface, an electrode anchor portion formed around a peripheral portion of the second surface, and an electrode shaft portion. A protruding portion having a semicircular cross-section and a size smaller than a radius of the electrode shaft portion is formed around a peripheral edge portion of the second surface. A counterbore flat surface portion is formed in the lining body to define an arc portion of the inner surface as a flat surface, and while uniformly coming into contact with the counterbore flat surface portion of the lining body with pressure, the protruding portion of the electrode anchor portion bites into the counterbore flat surface portion.

Abstract: Vibrating wire viscometers are described. Some example vibrating wire viscometer housings include a flowline through the housing to expose a first wire to a downhole fluid, a cavity in the housing to hold a magnet and to conduct one or more additional wires from the flowline to a signal generator, first and second electrically conductive posts mechanically coupled to the housing to hold the first wire in tension within the flowline, and a seal mechanically coupled to the housing to prevent access to the magnet by the downhole fluid.

Abstract: A magnetic circuit device (1) for implementing the magnetic circuit of a magnetic-inductive flow meter (12) has at least one coil (2b) which generates a magnetic field, at least two opposing flat pole elements (3a, 3b), between which, in the installed state, the measurement tube (13) of the magnetic-inductive flow meter is located, and with at least one magnetically conductive connecting element (4a, 4b) for magnetic closure of the magnetic circuit. The cross section of the core (2a) of the coil (2) and/or of the magnetically conductive connecting elements (4a, 4b) is as small as possible. Preferably, the magnetically conductive connecting element or the magnetically conductive connecting elements (4a, 4b) are arc-shaped so that the resulting magnetic circuit device (1) has a ring-shaped outer contour and extensively encompasses at least one of the flat pole elements (3a, 3b).

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: An electromagnetic flowmeter for mass flow measurement of a flowing medium having a measuring tube (1), a magnetic field generator for generating a magnetic field that at least partially passes through the measuring tube (1), two magnetic coils (2), and two electrodes for tapping into a measurement voltage induced in the flowing medium. The measuring tube (1) is designed as an integrally molded metal pipe or as a metal pipe produced integrally by hydroforming. Preferably, the measuring tube has a wall thickness that is smaller at a mid-section than at its ends, and reinforcing ribs in the mid-section.

Abstract: An electromagnetic flowmeter for mass flow measurement of a flowing medium having a measuring tube, a magnetic field generator for generating a magnetic field at least partially passing through the measuring tube, having two electrodes for tapping into a measurement voltage induced in the flowing medium and having a housing incorporating the measuring tube, the magnetic field generator and the electrodes, wherein the measuring tube has a cross section that varies along its length and the cross section in the mid-section of the measuring tube is smaller than at its ends, preferably the cross section of the measuring tube being rectangular in its mid-section, optionally also square, and wherein the housing preferably has a circular cross section. At least one reinforcement, preferably two, is provided in the mid-section of the measuring tube joining the measuring tube and the housing.

Abstract: The present invention relates to a method for inhibiting in a non-aqueous, non-conductive liquid. The present method also relates to a corrosion inhibitor that can be employed in such a liquid. The method can include measuring or detecting the present corrosion inhibitor with a magnetic flow meter.

Abstract: A coil assembly includes a coil form and a winding. The coil form includes a base defining a loop defined by a pair of opposed first sides and a pair of opposed second sides, a plurality of spaced apart support members extending from the base along the first sides, and a coil support structure extending from the base at each of the second sides. Each support member includes a first portion and a second portion, the first portion extending from the base and the second portion extending from the first portion, with a gap is defined between adjacent support members. The winding abuts the first portion of at least some of the spaced apart support members and is at least partially secured by the second portions of the support members. The winding abuts each of the coil support structures, and is curved in a saddle shape.

Abstract: A magnetic-inductive flow meter is provided that includes a pressure-resistant plastic housing that includes an inlet port, an outlet port, and an intermediate measuring unit that has a duct wall and a measurement duct through which the fluid to be measured flows. Two opposite measuring electrodes are arranged in the duct wall and are oriented perpendicular to the magnet poles. Taking into account the maximum admissible pressure for the selected plastic, the duct wall is reduced to a minimum admissible thickness in the region of the magnet poles. An internal reinforcement cage that includes at least two internal transverse bulkheads and at least two internal longitudinal ribs stabilizes the duct wall. An external reinforcement cage that includes at least two first external longitudinal ribs retains and stabilizes the internal reinforcement cage and connects the measuring unit in a tension-proof manner to the inlet port and the outlet port.

Abstract: It is described a method of measurement of the volume VD of the flow-rate of electrically conductive liquids the conductivity of which is at least codetermined by at least one parameter p, wherein the liquid flows through a vessel having a predetermined shape, and wherein the respective filling volume Vo is determined by at least one measured value x, which is measured by an electrical conductivity measuring device comprising electrodes, wherein the vessel is filled in succession and then is emptied through its outlet, through which the filling heights h are constantly changing. At least one reference table comprising calibration measured values xR and filling volumes Vo belonging to them is constructed by means of calibration measurements using several liquid samples, which have different p-values and different filling heights h in the vessel.

Abstract: An electromagnetic flowmeter includes at least one electromagnet coil arranged outside a liquid flow passage for generating an electromotive force in the liquid flow, and at least one pair of electrodes adjustably extending within the liquid flow for generating a velocity component signal. Preferably, two collinearly arranged coils are provided externally on opposite sides of the liquid flow passage, and a first set of two orthogonally-arranged pairs of coplanar electrodes are mounted on an adjustable probe strut that extends into the liquid flow. For greater accuracy, a Hall-effect device is provided on the probe. Additional sets of electrode pairs may be secured to the strut in planes parallel to the first electrode set. A second pair of collinear coils may be mounted externally of the liquid passage and orthogonally relative to the first coil pair, the two pairs of coils being alternately energized to produce three orthogonally arranged velocity components.

Abstract: Techniques for enhanced microfluidic impedance spectroscopy include causing a core fluid to flow into a channel between two sheath flows of one or more sheath fluids different from the core fluid. Flow in the channel is laminar. A dielectric constant of a fluid constituting either sheath flow is much less than a dielectric constant of the core fluid. Electrical impedance is measured in the channel between at least a first pair of electrodes. In some embodiments, enhanced optical measurements include causing a core fluid to flow into a channel between two sheath flows of one or more sheath fluids different from the core fluid. An optical index of refraction of a fluid constituting either sheath flow is much less than an optical index of refraction of the core fluid. An optical property is measured in the channel.

Abstract: An embodiment of a piezoelectric assembly for an ultrasonic flow meter comprises a piezoelectric element including a first face and a second face. In addition, the piezoelectric assembly comprises a first electrode engaging the first face. Further, the piezoelectric assembly comprises a second electrode engaging the second face. Still further, the piezoelectric assembly comprises an electrically conductive shim connector attached to the first electrode. Moreover, the piezoelectric assembly comprises a first wire electrically coupled to the shim connector.

Abstract: A sensor assembly for a fluid flowmeter including a body having a hollow interior where the body is configured to have a moisture impermeable barrier that prevents moisture from entering the interior at extreme fluid pressures. The assembly includes at least one electrode that is mounted on the body and a coil assembly configured to be removably inserted in the hollow interior of the body, where the coil assembly includes at least one magnetic coil electrically isolated from the at least one electrode when the coil assembly is inserted into the hollow interior of the body.

Abstract: An electromagnetic flowmeter includes a measuring tube, electrodes, an exciting coil for applying, to a fluid, a time-changing magnetic field asymmetrical with respect to a plane PLN, a signal conversion unit which extracts a ?A/?t component, irrelevant to a fluid flow velocity, from a resultant electromotive force of an electromotive force based on the ?A/?t component and an electromotive force based on a v×B component originating from the flow velocity of the fluid, a flow rate output unit which removes a variation factor for a span as a coefficient applied to a magnitude V of a flow velocity of the v×B component in the resultant electromotive force, based on the extracted ?A/?t component, and calculates a flow rate of the fluid from a result obtained by removing the variation factor, and signal lines inclined with respect to a direction of the magnetic field in parallel with the plane PLN.

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: One embodiment of an electromagnetic flow rate measurement system includes electromagnetic flowmeters arranged at intervals from one another in the peripheral direction of an annular flow passage 1 in which an electric conductive fluid flows. Each of the electromagnetic flowmeters comprises: an excitation member that has magnets arranged at intervals from one another in the outer peripheral surface of the annular flow passage so as to form a magnetic field in the direction perpendicular to the outer peripheral surface of the annular flow passage; and electrodes that are provided between the magnets of the excitation member and between the magnets of the excitation member so as to measure voltage generated when the electric conductive fluid crosses the magnetic field. The polarities of the magnets at the end portions of the closest excitation members of the adjacent electromagnetic flowmeters are opposed to each other.

Abstract: A wriggler device is provided for a gas meter endpoint or gas meter index as an interface with a gas meter drive mechanism. In general, the wriggler may include a base surface, at least one interface wall, and at least one guide wall. The base surface has a peripheral edge and a center point. The interface wall extends at an interface angle from the base surface, and may have an interface surface and a tip portion, with the tip portion spaced from the base surface. The at least one guide wall may extend between the base surface and the tip portion, and may have a guide surface. The guide wall may be configured to guide the drive mechanism along the guide surface to the base surface. Engagement of the interface surface by the drive mechanism causes the wriggler to rotate.

Abstract: The surface of a signal electrode is treated as substrate treatment. An oxide film on the surface of the signal electrode is removed by roughing. The roughened surface is used as a surface treated face. A coating of fluororesin is provided on the surface treated face for lining or thermal welding to the lining material. A signal electrode is provided in the resin lining. Since the oxide film was removed from the surface of the signal electrode for roughening, the adhesive force of the coating of the fluororesin is increased. The fluororesin coating and the resin lining melt each other, and the fluororesin coating is strongly bonded to the resin lining. The adhesion between the signal electrode and the resin lining is increased without opening a hole in the signal electrode. A method uses a primer film formed by substrate treatment on the surface of the signal electrode.

Abstract: A method for operating a magneto-inductive flow measuring system, wherein the magneto-inductive flow measuring system has a measuring tube, wherein measuring tube has a lumen for the conveying an at least slightly electrically conductive, measured substance, and wherein the magneto-inductive flow measuring system has a first and a second electrode electrically interacting with the measured substance.

Abstract: A system and method for corrosion protection of measuring electrodes in electromagnetic flowmeters, wherein an electromagnetic flowmeter for measuring the flow of a medium through a measuring tube comprises first and second metallic measuring electrodes arranged on opposite sides of the measuring tube and in contact with the medium. The rate of flow of the medium in the measuring tube is measurable by output signals from the measuring electrodes representative of a potential difference between the measuring electrodes induced by the flow of the medium in the measuring tube in the presence of a magnetic field.

Abstract: An electromagnetic flowmeter for measuring the flow of a medium through a measuring pipe, wherein the flowmeter includes first and second electrodes arranged on opposite sides of the measuring pipe and coupled electrically or capacitively to the medium. A common mode test signal is passed to the first and second electrodes. A third electrode is provided at the top of the measuring pipe for receiving a response signal in response to the test signal passed to the first and second electrodes. The flowmeter also includes a detection device for detecting whether the third electrode is in contact with the medium based on the response signal.

Abstract: An electromagnetic flowmeter having a measuring tube, at least one magnetic device and at least two electrodes. The measuring tube having an inlet section with an inlet section terminal cross section, an outlet section with an outlet section terminal cross section, a recess formed between the inlet section and the outlet section with a recess cross section that is wider than the inlet section terminal cross section and the outlet section terminal cross section, and an internal coating positioned in the recess. The layer thickness of the internal coating is chosen to be appropriately thick in order to guarantee electrical insulation and to arrange the internal coating in the recess such that it is protected from damage by flowing measurement fluid.

Abstract: An apparatus is disclosed that includes a measuring pipe comprising an inner layer and a non-magnetic outer layer; an electric flow meter electrically connected to the measuring pipe and operable to measure the flow of a material within the pipe; an insert comprising non-magnetic material exposed to the interior space of the measuring pipe and in electrical connection with the outer layer of the measuring pipe, wherein the insert is operable to provide a common ground between the material within the pipe and the flow measuring device.

Abstract: A magnetic-inductive flowmeter for measuring the rate of flow of a flowing medium, having a measurement line, a magnetic field generating means for generating a magnetic field which at least partially penetrates the measurement line, and two measurement electrodes, and an electrically insulating cover layer provided at least partially over the inside of the measurement line, the measurement electrodes being strip-shaped having a length in a peripheral direction of the measurement line of between about just under one fourth of the periphery of the measurement line to about just over half the periphery of the measurement line and being exposed to the interior of the measurement line to be in direct, contact with the flowing medium. The measurement electrodes can be made of the same material or a similar material as the cover layer, but having a much higher electrical conductivity than the material of the cover layer.

Abstract: An electromagnetic flowmeter that prevents fluctuations in the frequency of synchronized pulse signals due to momentary fluctuations of the power source voltage. The comparator of an AC synchronizing circuit that generates pulse signals synchronized to the frequency of a commercial power source is given a hysteresis function in which a first threshold value Vth1 and a second threshold value Vth2 are set up in the comparator. The comparator compares the level of divided AC signals from a dividing circuit with the first threshold value Vth1, and if the level of the divided AC signals exceeds the first threshold value Vth1, the level of the synchronized pulse signals is inverted from the “L” level to the “H” level; and if the level of the divided AC signals falls below the second threshold value Vth2, the level of the synchronized pulse signals is inverted from the “H” level to the “L” level.

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: An electromagnetic flowmeter for giving a magnetic field to a measurement fluid, detecting an electric signal occurring in the measurement fluid according to the magnetic field, and computing a flow quantity value based on the electric signal includes a zero point measurement section for measuring a zero point of the measurement fluid; a storage section for storing the measured zero point measurement value; a determination section for determining whether or not the difference between the preceding zero point measurement value stored in the storage section and the present zero point measurement value is beyond a predetermined value range; and at least either a transmission section for transmitting the determination result or a display section for displaying the determination result when the determination section determines that the difference is beyond the predetermined value range.

Abstract: An apparatus for measuring volume- or mass-flow of a medium flowing through a measuring tube in the direction of the measuring tube axis, and includes: a magnet system, which produces a magnetic field passing through the measuring tube essentially transversely to the measuring tube axis; at least one measuring electrode, which contacts the medium in a defined surface region; and a control/evaluation unit, which provides information concerning volume- or mass flow of the medium in the measuring tube on the basis of a measurement voltage induced in the at least one measuring electrode. At least the medium-contacting surface region of the at least one measuring electrode is manufactured of a chemically inert and electrochemically and mechanically resistant material.

Abstract: A method for predictive maintenance for a magneto-inductive flow-measuring device and/or to a method for determining electrical conductivity of a medium flowing through a magneto-inductive flow-measuring device, wherein the magneto-inductive flow-measuring device includes a magnet system, which produces a magnetic field passing through the measuring tube essentially transversely to a measuring tube axis; at least two measuring electrodes coupled with the medium, having a defined rest potential and being arranged in a region of the measuring tube lying essentially perpendicularly to the magnetic field; and a control/evaluation unit, which delivers information concerning volume- or mass-flow of the medium on the basis of measurement voltage induced in the measuring electrodes.

Abstract: A state detection device which detects parameters includes a measuring pipe, electrodes, an exciting coil that applies a magnetic field to the fluid, signal lines arranged at angle to the magnetic field such that an electromotive force is generated due to a change with passage of time in the magnetic field, and a state quantifying unit for extracting a ?A/?t component from resultant electromotive forces that are detected at the electrodes and the signal lines and are composed of an electromotive force of the ?A/?t component irrelevant to a flow velocity of the fluid and resulting from a change with passage of time in the magnetic field and an electromotive force of a v×B component relevant to the flow velocity of the fluid, and extracts a variation factor relevant to the parameter from the ?A/?t component to quantify the parameter based on the variation factor.

Abstract: With the non-magnetic-excitation period until a specific amount of time elapses from the commencement of the transition from the positive magnetic excitation period to the non-magnetic-excitation period defined as a first period T1 and the non-magnetic-excitation period until a specific amount of time elapses from the commencement of the transition from the negative magnetic excitation period to the non-magnetic-excitation period defined as a second period T2, the sum of a voltage produced at a detecting electrode and a voltage produced at a detecting electrode, at the time of each first period T1 and second period T2, is calculated as a sum of voltages between electrodes, and a fault in an electromagnetic flow meter, such as detection of an empty state, adhesion of an electrically insulating object to an electrode, and so forth, is evaluated based on the sum of voltages between electrodes.

Abstract: A magnetic flow meter includes a first spud end, a second spud end, and a sensing area positioned between the first spud end and the second spud end. The sensing area has a wall thickness that is thinner than a thickness of the first spud end and the second spud end. The flow meter can be manufactured via molding while a plug is positioned in at least two holes of the magnetic flow meter. The flow meter can also be manufactured to have a near hermetic seal formed by inserting a flexible printed circuit board in a slit of a gasket and then either compressing a register cup surrounding the tube gasket or driving a pin into a center pin around which the tube gasket is positioned.

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 device 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 device 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: The present invention provides a method of measuring the flow rate of an electrically conductive liquid in laminar flow and to an implementation measurement device that are easy to implement, simple to produce and compact. For this purpose, the invention provides a device for measuring the flow rate, comprising: a channel (1); a pair of electrodes (2a-2b); and at least one device (3) for measuring the voltage (V) between the electrodes (2a-2b) of said pair, an electrical double layer forming at the interface of each electrode with the conducting liquid. The device comprises means (4, 5) designed so that, when the conducting liquid is flowing through the channel, the flow velocity fields in the diffuse layers facing each electrode are different and so that the convective/diffusive charge equilibria of the electrical double layer at the interface of each electrode are different.