DE102014103378A1 - Measuring arrangement for determining and / or monitoring at least one measured variable of a medium - Google Patents

Abstract

Described and illustrated is a measuring arrangement (1) for determining and / or monitoring a measured variable of a medium (2). In this case, a container (3) for receiving the medium (2) encloses a container interior (4) and has a recess (5). A window element (6) in turn encloses a measuring interior (8) which lies outside the container interior (4) with an imaginary surface (7) located in the recess (5). The invention has for its object to propose a measuring device that avoids the disadvantages of the prior art for the application of electromagnetic radiation during the measurement and combines their advantages. The object is achieved in the measurement arrangement in question in that the window element (6) performs electromagnetic radiation and / or is transparent to electromagnetic radiation.

Description

The invention relates to a measuring arrangement for determining and / or monitoring at least one measured variable of a medium. In this case, there is a receptacle for the at least partial and / or at least temporary admission of the medium, in particular a tank-like or tubular design. The container encloses at least one container interior and has at least one recess. Furthermore, at least one window element is present, which is configured in such a way and arranged relative to the container, so that the window element and an imaginary surface located in the recess of the container enclose a measuring interior, which lies outside of the container interior. The measured variable is, for example, the fill level, the surface profile, the pH, the temperature, the viscosity, the mass flow or volume flow of the medium.

In modern process automation, processes or media are monitored by measuring devices or sensors in general by determining measured variables or registering their changes. Measurements of fill levels, the temperature, the pH, the oxygen content or the volume or mass flow are known. The media to be monitored, which may be bulk materials, liquids, general fluids, gases or different mixtures, are usually in containers. Such z. B. tubular or tank or silo-like containers take the media partly for a long time or only temporarily. Tubes as containers flow through, for example, flowable media, which therefore remain only temporarily in it.

The measurements are partly carried out by emitting a signal in the direction of the medium, that the signal interacts with the medium and that the signal received is evaluated, whereby a statement about the measured variable can be made about the extent of the interaction. If necessary, reflection or transmission effects are exploited.

Thus, it is known, for example, to determine the fill level of a medium with microwave signals (see, for example, US Pat EP 0 834 722 A2 ) or by ultrasonic signals to determine a measure of the flow of a flowing medium (see, for example, the WO 97/45707 A1 or the DE 10 2005 052 550 B3 ). There is still a whole series of other measuring principles known in the art.

Furthermore, it can be stated that there are at least two variants for a measuring arrangement in the prior art.

On the one hand, there is a structural device as part of the container for the respective measuring device which serves to measure the measured variable. This is for example given in the pockets for the ultrasonic flow measurement according to the WO 97/45707 A1 or at the nozzle for the level measurement according to the EP 0 834 722 A2 ,

In both examples, the container has at least one recess - a hole - in the wall, which is surrounded by a metallic window element - as a window for the measurement on the interior of the container. If one places an imaginary surface in the recess, which could close the recess as it were, then a measuring interior is enclosed by this imaginary surface and the window element which lies outside the interior of the container and thereby adjoins or expands it.

The signals for the measurement are thereby generated within the measuring interiors or coupled into it. For level measurement according to EP 0 834 722 A2 using microwaves - ie electromagnetic radiation - in particular a waveguide is introduced directly into the measuring interior.

On the other hand, the shows DE 10 2005 052 550 B3 the possibility that in a normal pipe by a subsequent cultivation, a measuring arrangement is created. The measuring device is strapped onto the tube as a container. The tube has no special recess, so that no aforementioned window element is used.

One advantage of containers sealed with respect to measurements - ie those without a recess - lies in the fact that the actual process is self-contained and the medium can not escape or collect at one point. On the other hand, if there is a recess with a window element which represents the closure of the container in the region of the recess, then this possibly means a more stable and robust measuring arrangement, which therefore may possibly also be dimensioned smaller. The latter is particularly relevant because a measurement arrangement is provided in most cases only a limited outdoor space available. However, if at least part of the measuring device is accommodated in the measuring interior, this always entails the risk of dirt pockets or condensing points or entire condensation areas.

A measuring arrangement for level measurement by means of electromagnetic radiation according to the radar principle with an antenna cone, in the Container interior protrudes, for example, shows the EP 1 445 588 A2 ,

The invention is therefore based on the object of proposing a measuring arrangement for measuring or monitoring at least one measured variable of a medium at least temporarily located in a container, which avoids the disadvantages of the prior art as possible, and possibly possible for the application of electromagnetic radiation during the measurement whose advantages are united.

The measuring arrangement according to the invention, in which the previously derived and indicated object is achieved, is initially and essentially characterized in that the window element at least partially performs electromagnetic radiation and / or is transparent to electromagnetic radiation.

In the measuring arrangement according to the invention, the container is designed specifically for the measurement in that it has a recess to which the window element adjoins. In this case, in one variant, the window element is directly connected to the wall around the recess and, in an alternative embodiment, the window element is fastened or arranged indirectly via a coupling element in the region of the recess. In one embodiment, a housing or a housing component is located between the window element and the wall surrounding the recess.

In one embodiment, the recess consists in particular of a hole in the wall of the container. In a further embodiment, the area around the recess and thus also around the window element is free of a nozzle which would create a distance between the wall of the container around the recess and the window element away from the container interior.

The window element also results in the additional measuring interior, which adjoins the interior of the container and, as it were, supplements or expands it to the outside.

The imaginary surface represents the imaginary conclusion of the interior of the container, which would exist in the region of the recess without the recess.

A special feature of the measuring arrangement according to the invention over the prior art results from the fact that the window element is at least partially designed so that it can carry electromagnetic radiation and / or is transparent to it. For example, it is possible to introduce microwave radiation through the window element into the measuring interior or to receive it.

Therefore, in the measuring arrangement according to the invention, an additional interior is created for the measurement and it is simultaneously possible for the actual measuring apparatus to remain at least partially outside this measuring interior.

This also reduces the risk of so-called dirt pockets around the measuring arrangement in the process.

In one embodiment, the window element is fastened substantially free of a nozzle attached to the container in the region of the recess.

A nozzle would be a kind of increase of the window element away from the container itself.

In one embodiment, the window element is designed at least in sections for the measurement of the measured variable by means of ATR infrared spectroscopy.

In ATR infrared spectroscopy (attenuated total reflection), radiation is guided in total reflection in an optical waveguide. This optical waveguide is part of the window element here. In the case of total reflection, evanescent waves form behind the reflective boundary surface and interact with the medium in the vicinity of the surface of the optical waveguide. In turn, the radiation guided in the waveguide is attenuated, which conversely also allows conclusions to be drawn about the medium or the respective measured variable.

In a further embodiment, the window element consists at least partially of a dielectric or of a glass or of a ceramic or of a plastic.

This embodiment is particularly advantageous for the variant in that the electromagnetic radiation is microwave radiation, as used, for example, in fill level measurements according to the radar principle or according to the TDR (time domain reflectometry) method. The window element is in particular designed so that it meets the prevailing process conditions, eg. B. with respect to pressure, temperature, etc. withstands.

In one embodiment, the window element is in particular transparent or permeable to electromagnetic radiation in the microwave range and in particular for the frequency range in the GHz range and more particularly for the frequency range around 80 GHz.

Generally, depending on the configuration, the window element consists of only one material or of several different materials. The choice of materials also depends on whether a transmission, refraction or reflection measurement should take place. Furthermore, a corresponding adaptation to the prevailing process conditions and, if necessary, requirements to be met for the respective application must also be carried out.

In order to produce said measuring interior, it provides an embodiment that the window element has an at least partially away from the measuring interior convexly outwardly curved inner contour.

Due to the convex curvature, only the geometry forms a space between the inner contour of the window element as the side or surface of the window element which faces the recess of the container and thus also the interior of the container, and the imaginary surface which is in the recess the container is located and thus limited by this.

In other words, the window element is curved away from the container interior to form the measuring interior.

In this case, the outwardly convex inner contour results through the corresponding concave side of the window element.

In one embodiment, the window element is at least partially rotationally symmetrical with respect to the inner contour.

As a positive secondary aspect, a certain lens function for the electromagnetic radiation can be set in a convex course.

If the inner contour curves convexly outward away from the container interior, then this results in the part of the window element which comprises this inner contour, a concave geometry, since the concave lens comprises the convex portion of the measuring interior.

In a further embodiment, which starts from the preceding embodiment, is a vertex of the convex inner contour - as the outermost curved region - substantially perpendicular to the imaginary surface above a center of the recess. The convex structure is therefore centrally located above the recess in this embodiment.

In one embodiment, the inner contour of the window element is at least partially meander-shaped. In this context, if necessary, the design is used that at least one pump element is used, which draws the medium from the container interior into the measuring interior or vice versa again removed from it.

An embodiment includes that the window element changes its geometry temperature and / or pressure-dependent reversible. In this embodiment, the window element expands, for example, depending on temperature and pressure, thereby allowing a further gain in knowledge about the medium in the container or on the prevailing process there.

In one embodiment, the window element is designed such that it has a continuously changing inner contour. The course is therefore particularly smooth and even.

In contrast, it provides an alternative embodiment that the window element has an at least partially discontinuously changing inner contour. The inner contour has in this embodiment, for example, over an edge or other area in which meet any individual sections used and thereby contribute to the overall course of the inner contour.

The window element is seen from the container interior of the recess located outside and in one embodiment, at least partially closes the resulting from the recess open access to the container interior again.

In one embodiment, it is provided that the window element continuously - in particular free of edges - merges into the border of the recess. In this embodiment, there are substantially no edges or beads or projections in the region of the transition between the window element and the wall of the container surrounding the recess. Thus, a smooth transition is provided in this embodiment. This prevents, for example, that medium accumulates behind projections, etc.

In order to avoid in particular the adhesion of medium to the window element, it provides an embodiment that the window element at least partially carries a coating on a surface facing the measuring interior, wherein the coating in the sense of the lotus Effect or principle of sharkskin. The lotus effect is a low wettability of a surface or minimized adhesion of dirt particles. A shark skin is characterized by so-called riblets (small ribs from English) as a surface geometry, which causes a reduction in the frictional resistance of turbulent surfaces overflow.

In one embodiment, at least one electronic component for transmitting and / or receiving electromagnetic radiation is provided for the actual measurement. If the electromagnetic radiation is in particular microwave radiation, then the electronic component comprises at least one corresponding circuit for generating microwave radiation or for evaluating or processing such radiation.

In a further embodiment, at least two electronic components for transmitting and / or receiving electromagnetic radiation are provided. In one embodiment, one electronic component serves to transmit and the other to receive electromagnetic radiation. In a further embodiment, at least one electronic component serves to transmit and receive electromagnetic radiation.

The two electronic components are preferably arranged relative to one another in such a way that a direct connection path for electromagnetic radiation exchanged between the two electronic components lies at least partially within the measuring interior and completely outside the container interior.

The electronic components are in the embodiment thus arranged with respect to the transmission and reception of electromagnetic radiation such relative to each other that the electromagnetic radiation that sends an electronic component and receives the other, outside the container interior and within the measuring interior is performed. The measurement is therefore carried out completely outside the container interior in this embodiment.

According to a further embodiment, at least one housing is present, which at least partially surrounds the window element and / or the measuring interior. In addition, at least one electronic component preferably radiates electromagnetic radiation into an interior of the housing and / or receives electromagnetic radiation therefrom.

The housing according to the aforementioned embodiment surrounds the window element and / or the measuring interior. The latter preferably only laterally adjacent and not in the direction of the imaginary surface or the recess in the wall of the container.

In a further embodiment, at least one electronic component radiates electromagnetic radiation into an interior of the housing and thus preferably also in the direction of the window element, or receives electromagnetic radiation from this direction alternatively or additionally. For this purpose, the housing is preferably designed accordingly to guide the radiation accordingly.

Starting from the preceding embodiment, in a further embodiment at least one horn antenna opening in the direction of the window element is present. The horn antenna is preferably arranged in a holding element at least with an end facing in the direction of the window element. In one embodiment, the holding element also serves to absorb unwanted electromagnetic radiation in the housing. Furthermore, the horn antenna and the retaining element are preferably at least partially surrounded by the housing.

In one embodiment, the horn antenna consists at least partially of a dielectric and, in an alternative or additional embodiment, at least partially of a metal.

Finally, it is furthermore preferably provided that the electronic component radiates electromagnetic radiation into the horn antenna or receives such radiation from or via the horn antenna. The horn antenna, which is configured in one embodiment in particular at least partially of a dielectric and in an alternative or supplementary embodiment at least partially made of a metal, therefore serves - as in the prior art known - the leadership of the electromagnetic radiation.

In one embodiment, the horn antenna is arranged substantially centrally above the window element and / or above the recess.

In an additional embodiment, it is provided that the electronic component radiates and / or receives electromagnetic radiation in the 80 Ghz range.

In particular, there are a variety of ways to design and further develop the measuring arrangement according to the invention. Reference is made on the one hand to the the patent claim 1 subordinate claims, on the other hand, to the following description of embodiments in conjunction with the drawings. In the drawing show

1 a section through a variant of a measuring arrangement according to the invention and shown schematically,

2 a section through a part of a measuring arrangement according to a first variant of the integration of the window element,

3 a section through a second variant of the integration of the window element,

4 a section through an alternative embodiment of the window element,

5 a top view of a measuring arrangement,

6 a section through an additional alternative embodiment of the window element,

7 a section through a schematically illustrated, detailed measuring arrangement and

8th a part of a further embodiment of a measuring arrangement.

In the 1 is an example of a measuring arrangement 1 shown schematically, in which a medium 2 from a container 3 is received in the form of a tank. The medium 2 Let's take as an example a bulk material whose level is to be determined or monitored as a measured variable.

The container 3 surrounds a container interior 4 whose size depends on the geometry of the container 3 is dependent. At the top of the container 3 there is a recess 5 in the wall of the container 3 - So there is a hole in the simplest case.

Above this recess 5 there is a window element 6 that the recess 5 as it covers and thereby also the interior 4 of the container 3 closes again. This will keep the process in the container 3 Protected against environmental influences and vice versa, the medium 2 not in the environment of the container 3 reach.

Through an imaginary surface 7 inside the recess 5 and by the history of the window element 6 becomes a measuring interior 8th enclosed, outside the container interior 4 lies and completes it to some extent.

The imaginary surface 7 corresponds to the part of the wall of the container 3 , which is due to the recess 5 is missing, thus defining the missing inner border of the container 3 ,

The window element 6 has in the illustrated embodiment in total and therefore also along its inner contour an outward, ie away from the measuring interior 8th curved convex shape. This is the window element 6 even conversely concave in its material course.

In other words: the measuring interior 8th is outward - so away from the container interior 4 - convex by the concave window element in this area 6 limited.

Furthermore, the window element 6 directly with the border 9 the recess 5 connected, with a smooth and executed free of edge transition is provided. As a result, areas are to be avoided, in which there is material deposits from the container interior 4 may come out or are more difficult to access for a cleaning.

The convex shape of the window element 6 allows a possibly occurring condensate to the edge of the window element 6 runs out and drips from there, for example.

A detail of a measuring arrangement 1 show the 2 ,

There is the inner contour of the window element 6 also outwardly convex.

The window element 6 is also in the area of the recess 5 and goes around the border 9 the recess 5 continuously in the wall area of the container 3 above. This requires a corresponding reduction of the measuring interior 8th , but at the same time makes the transition between the window element smoother 6 and container 3 ,

A differently designed window element 6 that on the border 9 immediately sits, shows the 3 ,

The convex structure of the inner contour of the window element 6 spans the entire recess 5 , wherein it can also be seen that the apex of the convex inner contour of the window element 6 substantially perpendicular above a center of the recess 5 is arranged. Is the recess 5 - As here - in particular circular, so the window element rises 6 - Which is designed in particular rotationally symmetrical - centrally above the center of the recess 5 ,

The transition area between window element 6 and border 9 is also designed so that there is freedom from edges, protuberances or recesses. This prevents dirt pockets and simplifies the cleaning of this area.

On the inner contour of the window element 6 the embodiment of 3 is additionally a coating 10 applied, which serves the lotus effect and thereby also prevents the adhesion of medium, condensate, etc., or at least reduced.

Draw the inner contours of the window elements 6 of the 2 and 3 by a steady course, which is free of edges or jumps out, so that shows 4 a window element 6 in which two partial progressions, which are executed essentially flat, meet in a sharp edge. This edge, in turn, is also centrally above the recess 5 or the imaginary surface 7 arranged.

The window element 6 extends as in the in the 2 illustrated embodiment within the recess 5 from the border 9 and thus is partially within the plane of the wall of the container 3 ,

A container 3 in the form of a tube, which is flowed through by the medium, shows the 5 ,

The recess 5 is here designed in particular circular and is located laterally on the container 3 ,

In a likewise tubular container 3 that in the 6 is shown and that of the medium 2 is flowed through, is another variant of the geometry of the window element 6 shown.

The window element 6 is designed meandering, whereby the measuring interior 8th undergoes a significant increase. At the same time, this embodiment also allows an extension of the measuring path, which results from the interaction of an electromagnetic radiation with a medium.

There are two electronic components for the measurement 11 arranged laterally and emit electromagnetic radiation in the microwave range or receive such radiation. This is purely schematic here by that of the electronic components 11 outgoing arrows indicated.

The connection between both electronic components 11 , which is overcome by the electromagnetic radiation via the direct connection, lies largely within the measuring interior 8th and completely outside the container interior 4 ,

Such an arrangement of electronics components positioned opposite each other 11 is in other - not shown here - embodiments also realized in which the window elements 6 the form of the embodiments 1 to 5 exhibit.

As a further special feature of the illustrated embodiment of 6 is a pump unit 16 provided, for example, a gas above the actual medium 2 in the measuring interior 8th suck in or expel it.

Because the course of the electromagnetic radiation completely outside the actual container interior 4 Therefore, there may be an interaction of the radiation with the medium 2 be avoided.

Alternatively, however, the medium can also be used via a corresponding pumping power 2 even in the measuring interior 8th be introduced.

A more detailed embodiment of a measuring arrangement 1 show the 7 ,

The wall of the container 3 has a circular recess 5 in which the window element 6 is arranged with a convex inner contour.

From the window element 6 and the imaginary surface 7 becomes the measuring interior 8th limited. The imaginary surface 7 is located in particular on the lower wall portion of the container 3 and complements the internal delineation of the container interior 4 ,

The - here only - electronic component 11 for radiating and receiving the electromagnetic radiation is located above the center of the recess 5 or also above the vertex of the convex inner contour of the window element 6 ,

The window element 6 is surrounded by a housing 12 that is in the area of the recess 5 also between the window element 6 and the outline 9 located. The housing 12 , which is particularly impermeable to electromagnetic radiation, comprises an interior space 13 ,

In an alternative embodiment - not shown here - the housing sits 12 on the wall of the container 3 on and is the window element 6 completely outside the recess 5 ,

The electromagnetic radiation in the microwave range is transmitted via a horn antenna 14 in the direction of the window element 6 or from there back to the electronic component 11 guided. For this the horn antenna opens 14 in the direction of the window element 6 or in the direction of the measurement interior 8th ,

The window element 6 facing end of the opening in this direction horn antenna 14 stuck in a holding element 15 Here, in particular, a part of the electromagnetic radiation, which unintentionally by reflections in the housing 11 yields, absorbs. Alternatively or additionally, in another embodiment (not shown here), additional absorber material is accommodated in the interior of the antenna in order to optimize the emission properties.

By the arrangement of the horn antenna 14 above the middle of the recess 5 and by the convex configuration of the inner contour of the window element 6 prevents condensate from the process or from the medium or from the interior 4 of the container 3 just in the area through which the electromagnetic radiation mainly propagates.

Due to the convex shape, the condensate separates essentially only on the outer regions of the window element 6 from and thus in the secondary areas of the electromagnetic radiation.

Due to the smooth and uniform course of the inner contour of the window element 6 The big advantage is that a cleaning with a spray head is easily possible.

In another - not shown here - embodiment has the housing 12 on its outside over heels that allow the housing 12 by screwing to the container 3 connect to.

The electronic component 11 is preferably designed for generating or receiving and processing microwave radiation in the 80 GHz range, so that it is configured in particular in the form of a chip on a printed circuit board or as part of a printed circuit board.

The measuring device in the measuring arrangement 1 of the 7 Application can be described in particular as free radiating level gauge according to the radar principle.

The measuring device in the embodiment of 8th consists of a - in particular rotationally symmetrical - window element 6 , on the edge of which - not shown here - process side facing away from an absorber element 17 rests. The absorber element 17 serves the absorption of electromagnetic radiation, in particular to improve the radiation properties.

The window element 6 is significantly more massive than in the other embodiments executed in the illustrated embodiment. This is also a flatter measuring interior 8th associated.

The absorber element 17 in turn surrounds with a recess which here in particular centrally above the window element 6 is arranged, the horn antenna 14 and closes with its inside - in the embodiment shown - even flush with the - here lower - end of the horn antenna 14 from.

The housing 12 is shown only partially here and provides a bearing surface for a fastening serving and extending radially outwardly, substantially flange-like portion of the horn antenna 14 ,

Inside one of the housing 12 included space and both the horn antenna 14 as well as the absorber element 17 encompassing is a holding element 15 available. The holding element 15 lies with a larger radius than the absorber element 17 on the window element 6 on.

In contrast to the design of the 7 So here is a two-part expression of holding element 15 for the horn antenna 14 and absorber element 17 intended.

The here partially concentric arrangement of absorber element 17 and holding element 15 is total of an adapter 18 includes. The adapter 18 is partially within a tank connection 19 arranged and lies partially on the tank connection 19 on.

As you can see, have the adapter 18 and the tank connection 19 in each case via corresponding recesses in order to allow a - not shown here - fitting.

Between the tank connection 19 and the adapter 18 as well as between the adapter 18 and the window element 6 are each in corresponding recesses seals 20 , which are for example O-rings or special form seals.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 0834722 A2 [0004, 0006, 0008]
• WO 97/45707 A1 [0004, 0006]
• DE 102005052550 B3 [0004, 0009]
• EP 1445588 A2 [0011]

Claims (15)

Measuring arrangement ( 1 ) for determining and / or monitoring at least one measured variable of a medium ( 2 ), wherein a - in particular tank-like or tube-like designed - container ( 3 ) for at least partially and / or at least temporarily recording the medium ( 2 ), the receptacle ( 3 ) at least one container interior ( 4 ) and at least one recess ( 5 ), wherein at least one window element ( 6 ) and wherein the window element ( 6 ) and designed relative to the container ( 3 ) is arranged so that the window element ( 6 ) and one in the recess ( 5 ) of the container ( 2 ) imaginary surface ( 7 ) a measuring interior ( 8th ) outside the container interior ( 4 ), characterized in that the window element ( 6 ) at least partially electromagnetic radiation results and / or is transparent to electromagnetic radiation. Measuring arrangement ( 1 ) according to claim 1, characterized in that the window element ( 6 ) is designed at least in sections for the measurement of the measured variable by means of ATR infrared spectroscopy. Measuring arrangement ( 1 ) according to claim 1 or 2, characterized in that the window element ( 6 ) consists at least partially of a dielectric or of a glass or of a ceramic or of a plastic. Measuring arrangement ( 1 ) according to one of claims 1 to 3, characterized in that the window element ( 6 ) an at least partially away from the measuring interior ( 8th ) has a convex outwardly curved inner contour. Measuring arrangement ( 1 ) according to claim 4, characterized in that a vertex of the convex inner contour substantially perpendicular to the imaginary surface ( 7 ) above a center of the recess ( 5 ) is arranged. Measuring arrangement ( 1 ) according to one of claims 1 to 5, characterized in that the window element ( 6 ) has a continuously changing inner contour. Measuring arrangement ( 1 ) according to one of claims 1 to 5, characterized in that the window element ( 6 ) has an at least partially discontinuously changing inner contour. Measuring arrangement ( 1 ) according to one of claims 1 to 7, characterized in that the window element ( 6 ) continuously - in particular free of edges - in the border ( 9 ) of the recess ( 5 ) passes over. Measuring arrangement ( 1 ) according to one of claims 1 to 8, characterized in that the window element ( 6 ) on a measuring interior ( 8th ) facing surface at least in sections a coating ( 10 ), wherein the coating ( 10 ) is designed in the sense of the lotus effect or the principle of shark skin. Measuring arrangement ( 1 ) according to one of claims 1 to 9, characterized in that at least one electronic component ( 11 ) is provided for transmitting and / or receiving electromagnetic radiation. Measuring arrangement ( 1 ) according to one of claims 1 to 10, characterized in that at least two electronic components ( 11 ) are provided for transmitting and / or receiving electromagnetic radiation and that the two electronic components ( 11 ) are arranged relative to one another such that a direct connection path for between the two electronic components ( 11 ) exchanged electromagnetic radiation at least partially within the measuring interior ( 8th ) and completely outside the container interior ( 4 ) lies. Measuring arrangement ( 1 ) according to claim 10 or 11, characterized in that at least one housing ( 12 ) is provided, which the window element ( 6 ) and / or the measuring interior ( 8th ) at least partially, and that at least one electronic component ( 10 ) electromagnetic radiation in an interior ( 13 ) of the housing ( 12 ) and / or receives from it. Measuring arrangement ( 1 ) according to claim 12, characterized in that at least one in the direction of the window element ( 6 ) opening horn antenna ( 14 ) is provided that the horn antenna ( 14 ) at least one in the direction of the window element ( 6 ) facing end in a holding element ( 15 ) is arranged that the horn antenna ( 14 ) and the retaining element ( 15 ) at least partially from the housing ( 12 ) and that the electronic component ( 11 ) electromagnetic radiation into the horn antenna ( 14 ) radiates and / or from the horn antenna ( 14 ) receives. Measuring arrangement ( 1 ) according to claim 13, characterized in that the horn antenna ( 14 ) substantially in the middle above the window element ( 6 ) and / or above the recess ( 5 ) is arranged. Measuring arrangement ( 1 ) according to one of claims 12 to 14, characterized in that the electronic component ( 11 ) emits and / or receives electromagnetic radiation in the 80 Ghz range.

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