DE2040682A1 - Tubular inductive flow meter - Google Patents
Tubular inductive flow meterInfo
- Publication number
- DE2040682A1 DE2040682A1 DE19702040682 DE2040682A DE2040682A1 DE 2040682 A1 DE2040682 A1 DE 2040682A1 DE 19702040682 DE19702040682 DE 19702040682 DE 2040682 A DE2040682 A DE 2040682A DE 2040682 A1 DE2040682 A1 DE 2040682A1
- Authority
- DE
- Germany
- Prior art keywords
- tubular
- flow meter
- core
- laminated core
- coil heads
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/56—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects
- G01F1/58—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters
- G01F1/586—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using electric or magnetic effects by electromagnetic flowmeters constructions of coils, magnetic circuits, accessories therefor
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Description
Rohrförmiger induktiver Durchflußmesser Die Erfindung bezieht sich auf einen rohrförmigen induktiven Durchflußmesser mit magnetfelderzeugenden Erregerspulen und zwei senkrecht zur Magnetfeldrichtung diametral zueinander angeordneten Elektroden, die mit dem durchströmenden elektrisch leitenden Medium in Berührung kommen, wobei der Durchflußmesser in eine Rohrleitung lösbar eingefügt ist.Tubular Inductive Flowmeter The invention relates to on a tubular inductive flow meter with magnetic field generating excitation coils and two electrodes arranged diametrically to each other perpendicular to the direction of the magnetic field, which come into contact with the electrically conductive medium flowing through, wherein the flow meter is releasably inserted into a pipeline.
Bei den bekannten Durchflußmessern dieser Art wird ein unmagnetisches, innen elektrisch isoliertes und mit zwei diametral gegenüberliegenden Elektroden bestücktes Trägerrohrstück mit den magnetfelderzeugenden Erregerspulen belegt. Das unmagnetische Trägerrohrstück hat stirnseitig Flansche, die mit Gegenflanschen der Rohrleitung verschraubt sind.In the known flow meters of this type, a non-magnetic, electrically isolated inside and with two diametrically opposed electrodes equipped support pipe section with the magnetic field generating excitation coils. That The non-magnetic support pipe section has flanges on the face side, which are connected to the counter flanges of the Pipe are screwed.
Durch die Notwendigkeit, solche unmagnetische Trägerrohrstücke aus teuerem Chrom-Nickel-Stahl vorsehen zu müssen und diese an die nach den jeweiligen Drücken und Normvorschriften erforderlichen Rohrleitungen mit ihren Gegenflanschen anpassen zu müssen, verteuern sich die Geräte beträchtlich, was auch eine ausreichende Lagerhaltung erschwert.Due to the need to make such non-magnetic support pipe pieces having to provide expensive chrome-nickel steel and these to the according to the respective Pressures and standard regulations required pipelines with their counter flanges Having to adapt, the devices become considerably more expensive, which is also sufficient Storage made difficult.
Insbesondere bei Durchflußmessern für große Nennweiten sind die Spulenköpfe der Erregerspulen so angeordnet, daß in Rohrlängsachse gesehen der magnetische Rückfluß über einen Luftspalt und die magnetisch leitfähigen angrenzenden Gegenflansche der Rohrleitung und die Zuganker erfolgt, was zu einer Magnetisierung dieser Teile und damit zur Wirbelstrombildung mit entsprechenden Wirbelstromverlusten führt. Außerdem beeinträchtigen diese Teile auch das Magnetfeld der Erregerspule der für sich auf dem Prüfstand geeichten Meßgeräte in unkontrollierbarer Weise.Particularly in the case of flow meters for large nominal widths, the coil heads the excitation coils are arranged so that the magnetic return flux is seen in the longitudinal axis of the pipe Via an air gap and the magnetically conductive adjacent counter flanges of the Pipeline and the tie rod takes place, resulting in magnetization this Parts and thus leads to the formation of eddy currents with corresponding eddy current losses. In addition, these parts also affect the magnetic field of the excitation coil for measuring instruments calibrated on the test bench in an uncontrollable manner.
Bei zwar nur relativ geringer Beeinträchtigung der Magnetfeldstärke können nur relativ geringe Form- und Lageänderung der Magnetfeldlinien durch diese Teile, die insbesondere durch Streulinien hervorgerufenen und auf dem Prüfstand abgeglichenen transformatorischen Störspannungen so stark verändert werden, daß Fehlmessungen auftreten, bzw. ein Abgleich eines angeschlossenen Kompensationsverstärkers nicht mehr möglich ist.With only a relatively small impairment of the magnetic field strength can only cause relatively small changes in shape and position of the magnetic field lines Parts, in particular caused by scatter lines and put to the test balanced transformer interference voltages are changed so much that Incorrect measurements occur or an adjustment of a connected compensation amplifier is no longer possible.
Der Erfindung liegt die Aufgabe zugrunde, induktive Durchflußmesser ohne solche Trägerrohrstücke mit Flanschen zu ermöglichen, bei denen eine Beeinträchtigung des Magnetfeldes der Erregerspule und das Auftreten von Wirbelströmen verhindert wird.The invention is based on the object of inductive flow meters without allowing such support pipe pieces with flanges, in which an impairment of the magnetic field of the excitation coil and the occurrence of eddy currents will.
Die Lösung dieser Aufgabe gelingt nach der Erfindung dadurch, daß ein rohrförmiges, aus ringförmigen Magnetblechen geschichtetes, von den Elektroden durchdrungenes Blechpaket in am Innenumfang angeordneten Längsnuten die achsparallelen Teile der Erregerspulen aufnimmt, daß die Spulenköpfe radial außerhalb der Innenbohrung des Blechpaketes liegen und mit einer Abschirmanordnung versehen sind und daß das Blechpaket mitsamt den Spulenköpfen sowie deren Abschirmanordnungen und den Elektrodenschäften in einem rohrförmig gestalteten Kunstharzteil angeordnet ist. Das rohrförmig gestaltete Kunstharzteil mit dem Blechpaket, den Erregerspulen mit den Abschirmanordnungen und den Elektroden ist als Baueinheit zwischen die sie radial überragenden Gegenflansche der Rohrleitung eingebracht und durch die Gegenflansche anpressende durchgehende Zuganker an die Gegenflansche dicht angedrückt gehalten.This object is achieved according to the invention in that a tubular, layered from ring-shaped magnetic sheets, from the electrodes penetrated laminated core in longitudinal grooves arranged on the inner circumference, the axially parallel Parts of the excitation coils accommodates that the coil heads radially outside the inner bore of the laminated core and are provided with a shielding arrangement and that the Laminated core including the coil heads as well as their shielding arrangements and the electrode shafts is arranged in a tubular synthetic resin part. The tubular shaped Synthetic resin part with the laminated core, the excitation coils with the shielding arrangements and the electrodes are as a structural unit between the opposing flanges protruding radially from them of the pipeline and through the counter flanges pressing through Tie rods are held tightly pressed against the mating flanges.
Zum leichteren Einpassen und Ausrichten kann das rohrförmig gestaltete tunstharzteil mit durchbrochenen Flanschen versehen sein, die von den durchgehenden Zugankern beanspruchungslos durchdrungen sind.For easier fitting and alignment, the tubular shaped Synthetic resin part provided with openwork flanges be that of the continuous tie rods are penetrated without stress.
Unter einem rohrförmig gestalteten Kunstharzteil ist dabei zu verstehen, daß innen ein zylinderförmiger Durchlaß mit dem Rohrleitungsinnendurchmesser entsprechendem Durchmesser vorgesehen ist, wogegen die äußere Kontur des Kunstharzteils kreisförmig oder eckig ausgeführt sein kann entsprechend der Form des Blechpaketes, der Spulenköpfe der Erregerspulen und deren Abschirmanordnungen. Die Form des Kunstharzteiles ist mit einfachen Mitteln und schnell den Erfordernissen entsprechend im Gießverfahren an die jeweiligen Rohrleitungen angepaßt herstellbar.A tubular synthetic resin part is to be understood here as that inside a cylindrical passage with the pipe inner diameter corresponding Diameter is provided, whereas the outer contour of the synthetic resin part is circular or can be made angular according to the shape of the laminated core, the coil heads the excitation coils and their shielding arrangements. The shape of the resin part is with simple means and quickly according to the requirements in the casting process can be produced adapted to the respective pipelines.
Eine besonders günstige Ausgestaltung der Erfindung besteht darin, daß die beiden Spulenköpfe am Umfang von je einem an das Blechtpaket grenzenden gewickelten Rohrkern und stirnseitig von je einem an diesen grenzenden geschichteten Ringkern eingefaßt sind. Da somit die Erregerspulen auch an den Spulenköpfen nach außen gegen magnetisierbare benachbarte Konstruktionsteile (Rohrleitung, Zuganker u.a.) abgeschirmt sind, bleibt das Magnetfeld formstabil.A particularly favorable embodiment of the invention consists in that the two coil heads on the circumference of each adjoin the sheet metal package wound tubular core and on the front side of each one layered adjacent to these Toroidal core are bordered. Since the excitation coils are also attached to the coil heads externally against magnetizable neighboring construction parts (pipeline, tie rods etc.) are shielded, the magnetic field remains dimensionally stable.
Das Ausführungsbeispiel der Erfindung ist in der Zeichnung im Längsschnitt schematisch dargestellt und nachfolgend erläutert.The embodiment of the invention is shown in the drawing in longitudinal section shown schematically and explained below.
Zwischen die Gegenflansche la und 2a zweier Rohrleitungsteile 1 und 2 aus ferromagnetischem Material ist ein rohrförmig gestaltetes Kunstharzteil 4 eingefügt, gegen das stirnsei-tig durch Zuganker 3 aus Stahl, die die Gegenflansche durchdringen, die Gegenflansche 1a, 2a angepreßt sind.Between the counter flanges la and 2a of two pipeline parts 1 and 2 made of ferromagnetic material is a tubular synthetic resin part 4 inserted against the front side by means of tie rods 3 made of steel, which form the counter flanges penetrate, the counter flanges 1a, 2a are pressed.
In das Kunstharzteil 4 mit zylinderförmigem Innendurchlaß, aus dem die Elektroden 10 ragen, und beliebiger äußerer Kontur ist ein geschichtetes rohrförmiges Blechpaket 5 eingebettet. Die Elektrodenschäfte durchdringen die Wand des Blechpaketes und des Kunstharzteiles nach außen. In Längsnuten des Blechpaketes 5 sind Erregerspulen mit ihren rohrachsparallelen Teilen eingebettes. Ihre Spulenköpfe 6, 7, 8, 9 sind in radialer Richtung aus dem Bereich der Innenbohrung gebracht und im rohrförmig gestalteten Kunstharzteil eingebettet.In the synthetic resin part 4 with a cylindrical inner passage from which the electrodes 10 protrude, and any outer contour is a layered tubular Laminated core 5 embedded. The electrode shafts penetrate the wall of the laminated core and the resin part to the outside. In the longitudinal grooves of the laminated core 5 are Excitation coils with their parts parallel to the tube axis. Your coil ends 6, 7, 8, 9 are brought out of the area of the inner bore in the radial direction and embedded in the tubular synthetic resin part.
Um eine Formbeeinflussung des Magnetfeldes durch die Gegenflansche la, 2a und die Zuganker 7 auszuschließen, werden die Spulenköpfe 6, 7, 8, 9 nach außen magnetisch abgeschirmt. Die Spulenköpfe 6 und 7 sind hierzu am Umfang von einem an das Blechpaket 5 angrenzenden gewickelten Rohrkern 11 und stirnseitig von einem an diesen angrenzenden geschichteten Ringkern 12 aus magnetisierbarem Material eingefaßt und die gesamte Anordnung in das Kunstharzteil eingegossen.To influence the shape of the magnetic field through the counter flanges la, 2a and the tie rods 7 exclude, the coil heads 6, 7, 8, 9 after magnetically shielded outside. The coil heads 6 and 7 are for this purpose on the circumference of a wound tube core 11 adjoining the laminated core 5 and on the end face of an adjoining layered toroidal core 12 made of magnetizable material edged and cast the entire arrangement in the synthetic resin part.
Dabei ist es aus räumlichen und Abschirmungsgründen besonders vorteilhaft, den Rohrkern 11 und den nutenlosen, gleiche radiale Abmessungen wie das genutete Blechpaket 5 aufweisenden Ringkern 12 am äußeren Umfang bündig aneinandergrenzen zu lassen. Somit ist auch der magnetische Rückfluß an den Spulenköpfen weitgehend räumlich festgelegt und gegen äußere Einflüsse unempfindlich.For spatial and shielding reasons, it is particularly advantageous the tubular core 11 and the grooved, same radial dimensions as the grooved Laminated core 5 having toroidal core 12 are flush with one another on the outer circumference allow. Thus, the magnetic return flow at the coil heads is also largely spatially defined and insensitive to external influences.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702040682 DE2040682C3 (en) | 1970-08-17 | 1970-08-17 | Inductive flow meter with a measuring tube made of insulating synthetic resin that is detachably held in a pipeline through which the medium flows between counter flanges of the adjacent pipeline parts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19702040682 DE2040682C3 (en) | 1970-08-17 | 1970-08-17 | Inductive flow meter with a measuring tube made of insulating synthetic resin that is detachably held in a pipeline through which the medium flows between counter flanges of the adjacent pipeline parts |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2040682A1 true DE2040682A1 (en) | 1972-02-24 |
| DE2040682B2 DE2040682B2 (en) | 1977-09-15 |
| DE2040682C3 DE2040682C3 (en) | 1978-05-18 |
Family
ID=5779902
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE19702040682 Expired DE2040682C3 (en) | 1970-08-17 | 1970-08-17 | Inductive flow meter with a measuring tube made of insulating synthetic resin that is detachably held in a pipeline through which the medium flows between counter flanges of the adjacent pipeline parts |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE2040682C3 (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4019386A (en) * | 1975-02-08 | 1977-04-26 | Fischer & Porter Co. | Unitized electrode assembly for electromagnetic flowmeter |
| US4098118A (en) * | 1977-02-23 | 1978-07-04 | Fischer & Porter Co. | Unitary electromagnetic flowmeter |
| US4181018A (en) * | 1977-02-23 | 1980-01-01 | Fischer & Porter Co. | Unitary electromagnetic flowmeter |
| US4214477A (en) * | 1978-12-07 | 1980-07-29 | Fischer & Porter Co. | Flangeless electromagnetic flowmeter |
| US4253340A (en) * | 1979-09-12 | 1981-03-03 | Fischer & Porter Co. | Unitary electromagnetic flowmeter |
| US4358963A (en) * | 1979-09-12 | 1982-11-16 | Fischer & Porter Company | Unitary electromagnetic flowmeter with sealed coils |
| US4420982A (en) * | 1977-02-23 | 1983-12-20 | Fischer & Porter Company | Unitary electromagnetic flowmeter with sealed coils |
| US4454766A (en) * | 1980-09-04 | 1984-06-19 | Rheometron Ag | Measured value recording device for magnetic-inductive flow meters |
| US4497212A (en) * | 1977-02-23 | 1985-02-05 | Fischer & Porter Company | Flangeless electromagnetic flowmeter |
| FR2558251A1 (en) * | 1984-01-17 | 1985-07-19 | Danfoss As | ELECTROMAGNETIC FLOW METER |
| FR2565684A1 (en) * | 1984-06-06 | 1985-12-13 | Danfoss As | ELECTROMAGNETIC FLOW METER |
| US4567775A (en) * | 1977-02-23 | 1986-02-04 | Fischer & Porter Co. | Unitary electromagnetic flowmeter having molded electrodes |
| DE3501768A1 (en) * | 1985-01-21 | 1986-07-24 | Danfoss A/S, Nordborg | ELECTROMAGNETIC FLOW METER |
| DE4019237A1 (en) * | 1989-06-16 | 1990-12-20 | Hitachi Ltd | ELECTROMAGNETIC FLOW METER |
| DE4002030A1 (en) * | 1990-01-24 | 1991-07-25 | Broder Ketelsen | INDUCTIVE FLOWMETER |
| US5385055A (en) * | 1992-01-31 | 1995-01-31 | Kabushiki Kaisha Toshiba | Electromagnetic flowmeter |
| US5540103A (en) * | 1993-10-14 | 1996-07-30 | Endress+Hauser Flowtec Ag | Electromagnetic flow sensor |
| WO1997041407A1 (en) * | 1996-04-26 | 1997-11-06 | Caledonian Control Technology Limited | Electromagnetic flowmeters |
| WO1999036749A1 (en) * | 1998-01-17 | 1999-07-22 | Caledonian Control Technology Limited | Electromagnetic flowmeters |
| DE10347878A1 (en) * | 2003-10-10 | 2005-05-04 | Abb Patent Gmbh | Magnetic-inductive measuring device for flowing substances and method for its production |
| EP1696214A1 (en) * | 2005-02-28 | 2006-08-30 | Krohne AG | Flow meter and method of installing a flow meter |
| EP0770856B2 (en) † | 1995-10-27 | 2007-09-26 | Yamatake Corporation | Electromagnetic flowmeter |
| DE102006020265A1 (en) * | 2006-04-27 | 2007-10-31 | Endress + Hauser Flowtec Ag | Magnetic-inductive sensor for use as primary transducer in line measuring instrument, has measuring tube and coil holder connected with one another in joint-free manner, so that coil is formed as integral component of measuring tube |
| US7908932B2 (en) | 2006-04-27 | 2011-03-22 | Endress + Hauser Flowtec Ag | Magneto-inductive measuring transducer |
| GB2490685A (en) * | 2011-05-10 | 2012-11-14 | Magma Global Ltd | Fluid conduit |
| DE102017130717A1 (en) * | 2017-12-20 | 2019-06-27 | Endress+Hauser Flowtec Ag | Manufacturing process for the production of a magnetic-inductive flowmeter and electromagnetic flowmeter |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3029791C3 (en) * | 1980-08-06 | 1994-08-04 | Aichi Tokei Denki Kk | Electromagnetic flow meter |
-
1970
- 1970-08-17 DE DE19702040682 patent/DE2040682C3/en not_active Expired
Cited By (35)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4019386A (en) * | 1975-02-08 | 1977-04-26 | Fischer & Porter Co. | Unitized electrode assembly for electromagnetic flowmeter |
| JPS6038182Y2 (en) * | 1977-02-23 | 1985-11-14 | フイツシヤ−・エンド・ポ−タ−・コンパニ− | Electromagnetic flow meter unit |
| US4098118A (en) * | 1977-02-23 | 1978-07-04 | Fischer & Porter Co. | Unitary electromagnetic flowmeter |
| US4181018A (en) * | 1977-02-23 | 1980-01-01 | Fischer & Porter Co. | Unitary electromagnetic flowmeter |
| US4420982A (en) * | 1977-02-23 | 1983-12-20 | Fischer & Porter Company | Unitary electromagnetic flowmeter with sealed coils |
| JPS5947821U (en) * | 1977-02-23 | 1984-03-30 | フイツシヤ−・エンド・ポ−タ−・コンパニ− | Electromagnetic flow meter unit |
| US4497212A (en) * | 1977-02-23 | 1985-02-05 | Fischer & Porter Company | Flangeless electromagnetic flowmeter |
| US4567775A (en) * | 1977-02-23 | 1986-02-04 | Fischer & Porter Co. | Unitary electromagnetic flowmeter having molded electrodes |
| US4214477A (en) * | 1978-12-07 | 1980-07-29 | Fischer & Porter Co. | Flangeless electromagnetic flowmeter |
| US4253340A (en) * | 1979-09-12 | 1981-03-03 | Fischer & Porter Co. | Unitary electromagnetic flowmeter |
| US4358963A (en) * | 1979-09-12 | 1982-11-16 | Fischer & Porter Company | Unitary electromagnetic flowmeter with sealed coils |
| US4454766A (en) * | 1980-09-04 | 1984-06-19 | Rheometron Ag | Measured value recording device for magnetic-inductive flow meters |
| FR2558251A1 (en) * | 1984-01-17 | 1985-07-19 | Danfoss As | ELECTROMAGNETIC FLOW METER |
| FR2565684A1 (en) * | 1984-06-06 | 1985-12-13 | Danfoss As | ELECTROMAGNETIC FLOW METER |
| DE3501768A1 (en) * | 1985-01-21 | 1986-07-24 | Danfoss A/S, Nordborg | ELECTROMAGNETIC FLOW METER |
| DE4019237A1 (en) * | 1989-06-16 | 1990-12-20 | Hitachi Ltd | ELECTROMAGNETIC FLOW METER |
| US5207105A (en) * | 1989-06-16 | 1993-05-04 | Hitachi, Ltd. | Electromagnetic flow meter |
| DE4002030A1 (en) * | 1990-01-24 | 1991-07-25 | Broder Ketelsen | INDUCTIVE FLOWMETER |
| WO1991011731A3 (en) * | 1990-01-24 | 1991-09-19 | Broder Ketelsen | Inductive flow meter |
| WO1991011731A2 (en) * | 1990-01-24 | 1991-08-08 | Broder Ketelsen | Inductive flow meter |
| US5385055A (en) * | 1992-01-31 | 1995-01-31 | Kabushiki Kaisha Toshiba | Electromagnetic flowmeter |
| US5540103A (en) * | 1993-10-14 | 1996-07-30 | Endress+Hauser Flowtec Ag | Electromagnetic flow sensor |
| EP0770856B2 (en) † | 1995-10-27 | 2007-09-26 | Yamatake Corporation | Electromagnetic flowmeter |
| WO1997041407A1 (en) * | 1996-04-26 | 1997-11-06 | Caledonian Control Technology Limited | Electromagnetic flowmeters |
| WO1999036749A1 (en) * | 1998-01-17 | 1999-07-22 | Caledonian Control Technology Limited | Electromagnetic flowmeters |
| US7124645B2 (en) | 2003-10-10 | 2006-10-24 | Abb Patent Gmbh | Magnetic-inductive measuring device for flowing substances and method for its production |
| DE10347878A1 (en) * | 2003-10-10 | 2005-05-04 | Abb Patent Gmbh | Magnetic-inductive measuring device for flowing substances and method for its production |
| EP1696214A1 (en) * | 2005-02-28 | 2006-08-30 | Krohne AG | Flow meter and method of installing a flow meter |
| DE102006020265A1 (en) * | 2006-04-27 | 2007-10-31 | Endress + Hauser Flowtec Ag | Magnetic-inductive sensor for use as primary transducer in line measuring instrument, has measuring tube and coil holder connected with one another in joint-free manner, so that coil is formed as integral component of measuring tube |
| US7908932B2 (en) | 2006-04-27 | 2011-03-22 | Endress + Hauser Flowtec Ag | Magneto-inductive measuring transducer |
| GB2490685A (en) * | 2011-05-10 | 2012-11-14 | Magma Global Ltd | Fluid conduit |
| GB2490685B (en) * | 2011-05-10 | 2017-05-24 | Salunda Ltd | Fluid conduit |
| US9752705B2 (en) | 2011-05-10 | 2017-09-05 | Magma Global Limited | Fluid conduit |
| US9920862B2 (en) | 2011-05-10 | 2018-03-20 | Magma Global Limited | Fluid conduit |
| DE102017130717A1 (en) * | 2017-12-20 | 2019-06-27 | Endress+Hauser Flowtec Ag | Manufacturing process for the production of a magnetic-inductive flowmeter and electromagnetic flowmeter |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2040682C3 (en) | 1978-05-18 |
| DE2040682B2 (en) | 1977-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C3 | Grant after two publication steps (3rd publication) |