Device for determining and / or monitoring at least one process variable

Abstract

The invention relates to a device (100) for determining and / or monitoring at least one process variable, comprising a housing region which does not contact media and has an electrically insulating shaped part (5). The shaped part (5) has an elongate, in particular at least partly cylindrical, guide (52) in which a tubular element (4) containing sensor element connection lines (2a, 2b, 2c) is arranged, in particular pressed thereinto.

Description

[0001] Device for determining and / or monitoring at least one process variable

[0002] The invention relates to a device for determining and / or monitoring at least one process variable of a medium, in particular a fluid, in particular with a temperature greater than 350°C. The fluid is a flowable medium, for example a liquid and / or a gas.

[0003] The device is in particular a field device in automation technology. In automation technology, particularly in process automation technology, field devices are often used to determine and / or monitor process variables. In principle, field devices are all devices that are used close to the process and supply or process-relevant information. These include, for example, level measuring devices, flow measuring devices, pressure and temperature measuring devices, pH and redox potential measuring devices, conductivity measuring devices, etc., which record the corresponding process variables such as level, flow, pressure, temperature, pH value or conductivity. Field devices often have a sensor unit that is in contact with a process medium, in particular at least temporarily and / or at least in sections, and having at least one sensor element that serves to generate a signal that is dependent on the process variable. If necessary,The sensor unit also has a further sensor element that serves to determine and / or monitor a process parameter different from the process variable, wherein, for example, cross-sensitivity is corrected by the process parameter during the determination and / or monitoring of the process variable. For example, the process variable is a flow rate and the process parameter is the temperature. Furthermore, field devices often have an electronics unit arranged in a housing, wherein the electronics unit serves to process and / or transmit the signals generated by the sensor unit, e.g., electronic signals.

[0004] For such field devices used close to the process, it must be ensured that, especially their sensor elements in contact with the medium, they can withstand the physical, chemical, and / or mechanical stresses of the process-related application when used as intended. Such stresses include, among other things, process-related vibrations and / or very high temperatures, the latter playing a particularly important role in high-temperature applications. For the purposes of this application, use at temperatures of at least 350°C, especially at least 400°C, is referred to as high-temperature application.

[0005] Depending on the measuring principle, the device has a movable component which, for example, carries out movements to generate and / or convert a measuring signal.

[0006] These include, for example, vortex flowmeters, which are designed for the capacitive detection of pressure fluctuations in a Kärmänn vortex street formed in the flowing fluid, and in which a component in contact with the medium comprises a paddle-shaped sensor vane. Vortex flowmeters are used to measure flow velocities of fluids flowing in pipelines, in particular fast-flowing and / or hot gases (>100°C) and / or fluid flows with a high Reynolds number (Re>10000), or volume or mass flow rates corresponding to a particular flow velocity. Examples of such vortex flowmeters are known, among others, from US-A 47 16 770, US-A 60 03 384, US-B 69 10 387, US-B 69 38 496,

[0007] US-B 97 19 819, US-B 1 08 45 222 or US-B 1 09 48 321 and are also offered by the applicant itself, for example under the trade name "PROWIRL D 200", "PROWIRL F 200", "PROWIRL O 200", "PROWIRL R 200".

[0008] Vortex flowmeters comprise a thin metal deformation body (measuring diaphragm) and a (mechanical) sensor assembly that, starting from a substantially planar surface of the deformation body, includes a sensor vane (usually rod-shaped, plate-shaped, wedge-shaped, or paddle-shaped) that is positioned at the deformation body's surface. The mechanical sensor assembly is designed to detect the pressure fluctuations in the Kärmän vortex street and convert them into movements of a deformation body corresponding to the pressure fluctuations. In such vortex flowmeters, the moving component is, for example, the deformation body.

[0009] In field devices, especially those containing moving components used in high-temperature applications, sensor element connecting cables used to electrically contact a sensor element arranged on the media-contacting component are subject to tensile and / or compressive stresses due to (thermo-)mechanical loads. A connection point, especially a solder joint, between the sensor element connecting cables and the associated sensor element supply elements is particularly susceptible to the aforementioned stresses.

[0010] The invention is based on the object of providing a device with increased resistance to the above-mentioned (thermo-)mechanical loads.

[0011] The object is achieved by a device for determining and / or monitoring at least one process variable of a medium, in particular a fluid, in particular with a temperature greater than 350°C, which device comprises:

[0012] - at least one sensor element arranged on a media-contacting component of the device; - sensor element connecting lines, in particular at least two, preferably three, which sensor element connecting lines serve to electrically contact the sensor element;

[0013] - a tubular element, in particular a metallic one, wherein all sensor element connecting lines are arranged in the hollow space of the tubular element, wherein the tubular element has an opening at one end region, from which opening the connecting lines protrude,

[0014] - sensor element supply elements, in particular at least two, preferably three, which sensor element supply elements are in particular designed as connection pins, and;

[0015] - a housing area that does not come into contact with the media and has an electrically insulating molded part; wherein the opening of the tubular element leads to a spatial section of the molded part, in which spatial section the sensor element connecting lines are electrically connected to the sensor element supply line elements, wherein in particular each of the sensor element connecting lines is electrically connected to exactly one associated sensor element supply element, wherein the molded part has an elongated, in particular at least partially cylindrical, guide, in which guide the tubular element is arranged, in particular pressed, wherein an outer diameter of the tubular element is larger than an inner diameter of the guide, based on the molded part in an original shape, so that the tubular element sits in a press fit in the guide of the molded part.

[0016] Preferably, the molded part is arranged in the non-media-contacting housing area, so that the connection point between the sensor element connecting lines and the sensor element supply line elements is not subject to the high thermal loads that exist at the media-contacting component. In the context of this application, "media-contacting component" means that the component, when used as intended, touches the medium for determining and / or monitoring the process variable of the medium.

[0017] All sensor element connecting cables are routed in a protected manner inside the tubular element. The tubular element therefore contains the sensor element connecting cables within it. Because the tubular element is press-fitted into the guide of the molded part, the aforementioned (thermo-)mechanical loads cannot lead to the aforementioned excessive tensile / compressive stresses at the connection point. The press fit is achieved by ensuring that the outer diameter of the tubular element is larger than the inner diameter of the guide. "Larger" refers to the molded part in its original form, i.e., a molded part without a tubular element inserted into the guide.

[0018] In one embodiment of the device, the outer diameter of the tubular element is at least 1.05, preferably 1.10 times as large as the inner diameter of the guide, based on the molded part in the original shape.

[0019] In one embodiment of the device, the molded part is cylindrical at least in sections, and in particular the cylinder axis of the molded part is parallel to the longitudinal direction of the elongated guide.

[0020] "Cylindrical" means, for example, elongated with a longitudinal axis that is at least twice as long as the diameter of a cross-sectional area. The cross-sectional area is, in particular, round, e.g., circular, oval, or elliptical. For shapes other than circular cross-sectional areas, corresponding definitions for the diameter of the cross-sectional area must be applied. For example, the diameter of a non-circular cross-sectional area corresponds to a (maximum or minimum) diameter or to a diameter of a circular area corresponding to the cross-sectional area, which circular area has the same area as the cross-sectional area.

[0021] Preferably, the cylinder axis of the molded part is parallel to a gradient direction, which extends from the media-contacting component to the non-media-contacting molded part. In the aforementioned high-temperature application, a high thermal gradient forms along the gradient direction and, consequently, a comparatively strong heat flow, which typically leads from the warmer media-contacting component to the cooler spatial section with the connection point between the sensor element supply line elements and the sensor element connection lines.

[0022] In one embodiment of the device, the molded part has a longitudinal slot parallel to the longitudinal direction of the guide, which longitudinal slot extends in particular over the entire length of the guide.

[0023] In one embodiment of the device, the longitudinal slot has a slot depth in a first direction perpendicular to the longitudinal direction of the longitudinal slot, which is dimensioned such that the longitudinal slot extends from an outer circumferential surface of the molded part to the guide arranged in the interior of the molded part, wherein the first direction corresponds in particular to a radial direction of the cylindrical guide.

[0024] The tubular element can be pressed into the internal guide by means of the longitudinal slot, which runs along its entire length. When the longitudinal slot expands, the molded part is (elastically) deformed to press the tubular element into the guide via the longitudinal slot, starting from the outer surface. The subsequent compression of the molded part holds the tubular element in the guide and presses it in.

[0025] In one embodiment of the device, the longitudinal slot has a slot thickness in a second direction, which second direction is perpendicular to the longitudinal direction of the longitudinal slot and the first direction, wherein the slot thickness is dimensioned such that it is at least 0.3 times and at most 1 times the inner diameter of the guide, in particular at least 0.5 times and at most 0.8 times the inner diameter of the guide, wherein the second direction corresponds in particular to a tangential direction of the cylindrical guide.

[0026] In one embodiment of the device, the molded part has an end face facing away from the media-contacting component, to which end face the space section adjoins, wherein the space section is at most 0.3 times, in particular at most 0.1 times, a length of the molded part away from the end face in a direction perpendicular to the end face.

[0027] The spatial section in which the sensor element connecting lines are electrically connected to the sensor element supply elements is therefore arranged on the end face of the molded part facing away from the media-contacting component. The direction perpendicular to the end face coincides, in particular, with the gradient direction mentioned above.

[0028] In one embodiment of the device, the molded part has a respective connection guide for each of the sensor element connection lines, in which the respective sensor element connection line is guided, wherein the connection guides are arranged in the molded part in such a way that the guide lies between the connection guides, in particular substantially centrally, and wherein in particular connection openings of the connection guides lie on a circular ring surface on the end face of the molded part facing away from the media-contacting component and are arranged in particular equidistantly on the circular ring surface.

[0029] Because the guide is located between the connection guides, the sensor element connecting cables are routed in different directions from the opening of the tubular element. This simplifies the contacting of the sensor element connecting cables with the sensor element connecting cables, as unwanted contact between the multiple sensor element connecting cables is avoided, for example, when connecting the sensor element connecting cables to the sensor element supply elements.

[0030] In one embodiment of the device, the molded part is spaced from the media-contacting component, in particular in a longitudinal direction of the device, in particular with a distance of at least 7 cm, preferably at least 10 cm.

[0031] As a result, the molded part is positioned at a distance from the media-contacting component in the gradient direction and is thermally insulated from it. The thermal stress to which the media-contacting component is exposed is therefore correspondingly reduced due to the distance in the molded part area.

[0032] In one embodiment of the device, the device has a cavity, in particular a hollow cylindrical cavity or an annular gap cavity, which extends between the molded part and an extension, which extension adjoins the media-contacting component in the direction of the molded part, wherein the cavity is filled or evacuated with air and / or a noble gas, in particular argon and / or krypton.

[0033] Due to the cavity, the thermal insulation between the media-contacting component or the extension and the molded part is correspondingly reinforced.

[0034] In one embodiment, the at least one sensor element is a temperature-sensitive sensor element, which sensor element is designed to generate a measurement signal representing the temperature of the medium and which sensor element is operable via the sensor element connecting lines, in particular in a 2-, 3-, or 4-wire circuit. Accordingly, 2-, 3-, or 4-sensor element connecting lines and associated sensor element supply elements are provided.

[0035] In one embodiment of the device

[0036] - the moulded part is made of an electrically insulating material and / or

[0037] - the molded part contains a plastic, in particular PFTE or PEEK, and is made of a plastic, in particular PFTE or PEEK.

[0038] The aforementioned plastics are suitable for use as electrically insulating molded parts. If these are only temperature-resistant at lower temperatures, e.g., 240°C, it should be ensured that a sufficiently large thermal gradient is established along the aforementioned gradient direction during high-temperature use. This is achieved by the design of the thermal insulation (gap and / or cavity). Furthermore, the aforementioned plastics exhibit comparatively high coefficients of thermal expansion (TCE). Strong temperature fluctuations therefore inevitably lead to significant (thermo-)mechanical stresses in the area of ​​the joint.Because the sensor element connecting cables are guided inside the tubular element, which in turn is pressed into the guide, the thermomechanical stress does not act directly as mechanical tensile / compressive loads on the electrical connection of the sensor element connecting cables with the associated sensor element supply elements.

[0039] In one embodiment of the device, the sensor element connecting leads are soldered to the sensor element supply elements, in particular, they are wound around the sensor element supply elements and soldered, and in particular, they are additionally bonded to the sensor element supply elements and to the molded part using an adhesive. The electrically conductive connection between the sensor element connecting leads and the sensor element supply elements is thus at least a material-to-material joint, namely a solder joint.

[0040] In one embodiment of the device, the process variable that can be determined and / or monitored with the device is a process variable that is different from the temperature of the medium, in particular a flow parameter of the fluid, in particular a flow velocity and / or a volume and / or mass flow rate, wherein a measurement signal for the process variable, in particular the flow parameter, is generated by means of the component in contact with the medium, and wherein the device for generating and / or converting the measurement signal has a movable component that executes movements during the generation and / or conversion of the measurement signal.

[0041] The device thus determines and / or monitors, for example, a flow parameter, and the temperature-sensitive sensor element serves to determine the temperature not as the actual process variable, but as a process parameter in addition to the process variable. Measuring temperature as a process parameter is used, for example, to account for cross-sensitivity, e.g., of a measurement signal for the flow parameter to temperature.

[0042] In one embodiment of the device, it is designed for capacitive detection of pressure fluctuations in a Kärmän vortex street formed in the flowing fluid. The component in contact with the fluid comprises a paddle-shaped sensor vane, and the movable component is a deformation body. Reference is made to the vortex flowmeters mentioned above.

[0043] In one embodiment of the device, a first temperature-sensitive sensor element is arranged on the paddle-shaped sensor vane. In one embodiment of the device, a second temperature-sensitive sensor element is arranged on the paddle-shaped sensor vane, wherein the second temperature-sensitive sensor element is arranged closer to the molded part than the first temperature-sensitive sensor element.

[0044] The invention further comprises the use of a device according to the invention for detecting a process variable, in particular a flow parameter, in particular a flow velocity and / or a volume and / or mass flow rate, of a fluid flowing in a pipeline with a fluid temperature of more than 350°C and / or with a pressure of more than 250 bar, in particular a steam.

[0045] The use includes, mutatis mutandis, all of the above-mentioned embodiments of the device.

[0046] The invention is explained in more detail with reference to the following figures, which are not to scale. Like reference numerals denote like features. For reasons of clarity or where otherwise expedient, previously mentioned reference numerals have been omitted in the following figures.

[0047] They show:

[0048] Fig. 1 a A perspective view of a molded part 5 in an embodiment of a device 100 according to the invention;

[0049] Fig. 1 b A perspective view of the molded part 5 in a device 100 according to the invention, with a tubular element 4 inserted therein; and

[0050] Fig. 2. A perspective view of an embodiment of the device 100 according to the invention.

[0051] Fig. 1 shows an embodiment of the molded part 5 according to the invention without a tubular element 4 inserted therein and to be inserted, whereas the molded part 5 with the tubular element 4 inserted therein is shown in Fig. 1 b.

[0052] The molded part 5 typically has a length of 0.1 cm to 20 cm, in particular 2 to 10 cm, in the longitudinal direction and a diameter of 0.1 cm to 10 cm, in particular 1 to 5 cm, perpendicular to this. The molded part is made of an electrically insulating plastic, e.g. PTFE. The molded part 5 is essentially cylindrical and has a guide 52 in its interior which serves to receive the tubular element 4. The guide 52 is shaped such that it is adapted to the shape of the tubular element 4 and is, for example, cylindrical here. Along a longitudinal direction LR, which is parallel to the cylinder axis ZA (see Fig. 1 b), the molded part 5 has a longitudinal slot 53. The longitudinal slot 53 serves to insert the tubular element 4 into a guide 52 of the molded part 5. Therefore, a slot depth ST is dimensioned such that the longitudinal slot 53 extends from an outer surface of the molded part 5 to the guide 52.Unlike the shape shown here, the longitudinal slot 53 can also have a tapered shape. In a tangential direction, it has a slot thickness SD (maximum, in the case of a tapered longitudinal slot) that is 0.4 times the inner diameter ID of the guide 52.

[0053] The inner diameter ID of the guide 52 is adapted to the tubular element 4 such that, in its original form shown in Fig. 1a, i.e., without the tubular element 4 inserted therein (Fig. 1a), it is smaller than the outer diameter AD of the tubular element 4 (Fig. 1b). Therefore, when the tubular element 4 is inserted, the molded part 5 springs against its longitudinal slot 53 and receives the tubular element 4, which is inserted via the longitudinal slot 53. This is illustrated in more detail in Fig. 2b. Since the outer diameter AD is larger than the inner diameter ID, the tubular element 4 sits in a press fit in the guide 52. By means of the press fit and the connection in the spatial section, (thermo-)mechanical stresses of the molded part 5 do not affect the connection of sensor element connecting lines 2a, 2b, 2c with associated sensor element supply line elements 3a, 3b, 3c as excessive (tensile / compressive) stresses.

[0054] The guide 52 is arranged centrally on an end face SF of the molded part 5 between connecting guides 6a, 6b, 6c arranged around it. The end face SF is preferably arranged on a side of the molded part 5 facing away from a media-contacting component (see Fig. 2).

[0055] The connection guides 6a, 6b, 6c form a spatial section in the molded part 5, which serves to connect three sensor element connecting lines 2a, 2b, 2c with three associated sensor element supply line elements 3a, 3b, 3c. For the sake of clarity, only two of the three sensor element connecting lines 2a, 2b, 2c or the associated sensor element supply line elements 3a, 3b, 3c are shown in Figs. 2b and 3. The sensor element supply line elements 3a, 3b, 3c are connection pins or connection pins. Preferably, the connection guides 6a, 6b, 6c are arranged equidistantly around the guide 52, so that when connecting the sensor element connection lines 2a, 2b, 2c to the sensor element supply line elements 3a, 3b, 3c, the sensor element connection lines 2a, 2b, 2c are guided in opposite directions with a maximized distance between them.

[0056] During the connection process, the three sensor element connecting leads 2a, 2b, 2c are wound around the corresponding sensor element supply elements 3a, 3b, 3c, then soldered to them, and then glued to the sensor element supply elements 3a, 3b, 3c and the molded part 5. This creates a solid connection that can withstand the mechanical stresses encountered during high-temperature use and / or with a movable deformable body.

[0057] Finally, Fig. 2 shows a device 100 with the molded part 5 arranged therein. The molded part is inserted into a housing area that does not come into contact with the media and is arranged at a distance from the media-contacting component in the gradient direction. As a result, the molded part 5 is thermally insulated from the media-contacting component. Thus, the molded part 5 is arranged, for example, opposite the media-contacting component along a longitudinal direction of the device 100.

[0058] In this embodiment, the device 100 is a vortex flow meter as mentioned above; other embodiments are of course possible and encompassed by the invention. The device 100 comprises a paddle-shaped sensor vane 10 in contact with the medium. A first sensor element 1a and a second sensor element 1b are arranged on this vane, each offset along a gradient direction of a heat flow. The sensor elements 1a, 1b serve to detect a temperature of the medium. The sensor elements 1a, 1b are contacted by means of the sensor element connecting lines 2a, 2b, 2c - here common - which are brought together in the tubular element 4. The sensor element connecting lines 2a, 2b, 2c serve to operate the sensor elements 1a, 1b in a 3-wire circuit. The temperature sensor elements 1a, 1b are, for example, a resistance element (also: RTD elements, short for Resistance Temperature Detector), in particular.a so-called PTC thermistor (PTC short for: positive temperature coefficient) such as a PT 100, and / or a thermocouple, e.g. of type R, S, B, J, T, E, K, N, C or A.

[0059] The device 100 is introduced into the medium only in sections, for example, via an extension 9 serving as a process connection. During high-temperature use, a heat flow develops along the gradient direction, in which heat is conducted from the paddle-shaped sensor vane 10 to the molded part, along the tubular element 4 to the molded part 5. In this embodiment, the molded part 5 is spaced from the extension 9 by a heat-insulating cavity 8 at a distance AB of 10 cm. The cavity 8 is, for example, evacuated and / or filled with a noble gas, or filled with air.

[0060] Due to the cavity 8 and the distance AB, there is no longer a large thermal bridge to the molded part, and heat conduction from the media-contacting component to the molded part 5 is impeded. This ensures that even at medium temperatures of up to approximately 400°C, the molded part 5 experiences temperatures of no more than 240°C. For example, heat conduction from the media-contacting component to the molded part 5 is at most so great that, in the event that the media-contacting component is exposed to a medium with a temperature of at least 350°C, a temperature gradient between the medium-contacting component and the molded part of at least 10%, in particular at least 20%, preferably in particular 25%, based on the temperature of the medium in °C.

[0061] The tubular element 4 is bent in the area of ​​the cavity 8 to create space for the connecting lines (not shown in detail here) through which a measurement signal for the process variable (here: mass flow) is transmitted. These connecting lines are also routed through the molded part 5, for example, through recesses not shown here. The cavity, the molded part 5, the tubular element 4, and any connecting lines are arranged inside a housing (not shown here).

[0062] Reference signs and symbols

[0063] 1a, 1b sensor element

[0064] 2a, 2b, 2c Sensor element connecting cables

[0065] 3a, 3b, 3c Sensor element supply elements

[0066] 4 tubular element

[0067] 41 Opening

[0068] 5 molded part

[0069] 51 room section

[0070] 52 leadership

[0071] 53 Longitudinal slot

[0072] 6a, 6b, 6c connecting guides

[0073] 8 Cavity

[0074] 9 Extension

[0075] 10 paddle-shaped sensor flags

[0076] 100 device

[0077] OD outer diameter of 4

[0078] ID inner diameter of 52

[0079] AB distance

[0080] SD slot thickness

[0081] ST slot depth

[0082] ZA cylinder axis

[0083] SF frontal area

[0084] LR longitudinal direction

Claims

Patent claims 1. Device (100) for determining and / or monitoring at least one process variable of a medium, in particular a fluid, in particular with a temperature greater than 350°C, which device (100) comprises: - at least one sensor element (1 a, 1 b) arranged on a media-contacting component of the device (100); - sensor element connecting lines (2a, 2b, 2c), in particular at least two, preferably three, which sensor element connecting lines (2a, 2b, 2c) serve to make electrical contact with the sensor element; - a tubular element (4), in particular a metallic one, wherein all sensor element connecting lines (2a, 2b, 2c) are arranged in the hollow space of the tubular element (4), wherein the tubular element (4) has an opening (41) at one end region, from which opening (41) the connecting lines protrude, - sensor element supply elements (3a, 3b, 3c), in particular at least two, preferably three, which sensor element supply elements (3a, 3b, 3c) are in particular designed as connecting pins, and; - a housing area that does not come into contact with the media and has an electrically insulating molded part (5); wherein the opening (41) of the tubular element (4) leads to a spatial section (51) of the molded part (5), in which spatial section (51) the sensor element connecting lines (2a, 2b, 2c) are electrically conductively connected to the sensor element supply line elements (3a, 3b, 3c), wherein in particular each of the sensor element connecting lines (2a, 2b, 2c) is electrically conductively connected to exactly one associated sensor element supply line element (3a, 3b, 3c), wherein the molded part (5) has an elongated, in particular at least partially cylindrical, guide (52), in which guide (52 the tubular element (4) is arranged, in particularpressed in, wherein an outer diameter (AD) of the tubular element (4) is greater than an inner diameter (ID) of the guide (52), relative to the molded part (5) in an original shape, so that the tubular element (4) sits in a press fit in the guide (52) of the molded part (5).

2. Device (100) according to claim 1, wherein the outer diameter (AD) of the tubular element (4) is at least 1.05, preferably 1.10 times as large as the inner diameter (ID) of the guide (52), based on the molded part (5) in the original shape.

3. Device (100) according to at least one of the preceding claims, wherein the molded part (5) is at least partially cylindrical, and wherein in particular the cylinder axis (ZA) of the molded part (5) is parallel to the longitudinal direction of the elongated guide (52).

4. Device (100) according to at least one of the preceding claims, wherein the molded part (5) has a longitudinal slot (53) parallel to the longitudinal direction of the guide (52), which longitudinal slot (53) extends in particular over the entire length of the guide (52).

5. Device (100) according to claim 4, wherein the longitudinal slot (53) has a slot depth (ST) in a first direction perpendicular to the longitudinal direction of the longitudinal slot (53), which is dimensioned such that the longitudinal slot (53) extends from an outer circumferential surface of the molded part (5) to the guide (52) arranged in the interior of the molded part (5), wherein the first direction corresponds in particular to a radial direction of the cylindrical guide (52).

6. Device (100) according to claim 5, wherein the longitudinal slot (53) has a slot thickness (SD) in a second direction, which second direction is perpendicular to the longitudinal direction (LR) of the longitudinal slot (53) and the first direction, wherein the slot thickness (SD) is dimensioned such that it is at least 0.3 times and at most 1 times the inner diameter (ID) of the guide (52), in particular at least 0.5 times and at most 0.8 times the inner diameter (ID) of the guide (52), wherein the second direction corresponds in particular to a tangential direction of the cylindrical guide (52).

7. Device (100) according to at least one of the preceding claims, wherein the molded part (5) has an end face (SF) facing away from the media-contacting component, to which end face (SF) the space section (51) adjoins, and wherein the space section (51) is at most 0.3 times, in particular at most 0.1 times, a length of the molded part (5) away from the end face (SF) in a direction perpendicular to the end face (SF).

8. Device (100) according to at least one of the preceding claims, wherein the molded part (5) has a respective connection guide (6a, 6b, 6c) for each of the sensor element connection lines (2a; 2b; 2c), in which the respective sensor element connection line (2a; 2b; 2c) is guided, wherein the connection guides (6a, 6b, 6c) are arranged in the molded part (5) such that the guide (52) lies between the connection guides (6a, 6b, 6c), in particular substantially centrally, and wherein in particular connection openings of the connection guides (6a, 6b, 6c) lie on an annular surface on the end face (SF) of the molded part (5) facing away from the media-contacting component and are arranged in particular equidistantly on the annular surface.

9. Device (100) according to at least one of the preceding claims and wherein the molded part (5) is spaced from the media-contacting component, in particular in a longitudinal direction of the device (100), in particular with a distance (AB) of at least 7 cm, preferably at least 10 cm.

10. Device (100) according to at least one of the preceding claims, wherein the device (100) has a cavity (8), in particular a hollow cylindrical cavity or an annular gap cavity, which extends between the molded part (5) and an extension (9), which extension (9) adjoins the media-contacting component in the direction of the molded part (5), and wherein the cavity (8) is filled or evacuated with air and / or filled with a noble gas, in particular argon and / or krypton.

11. Device (100) according to at least one of the preceding claims, wherein the at least one sensor element is a temperature-sensitive sensor element, which sensor element is designed to generate a measurement signal representing the temperature of the medium and which sensor element is operable by means of the sensor element connecting lines (2a, 2b, 2c), in particular in a 2-, 3-, or 4-wire circuit.

12. Device (100) according to at least one of the preceding claims, wherein - the molded part (5) consists of an electrically insulating material and / or - the molded part (5) comprises a plastic, in particular PFTE or PEEK, and in particular consists of a plastic, in particular PFTE or PEEK.

13. Device (100) according to at least one of the preceding claims, wherein the sensor element connecting lines (2a, 2b, 2c) are soldered to the sensor element supply line elements (3a, 3b, 3c), in particular to the sensor element supply line elements (3a, 3b, 3c) are wound and soldered, and in particular are glued to the sensor element supply elements (3a, 3b, 3c) and to the molded part (5) by means of an adhesive.

14. Device (100) according to at least one of the preceding claims, wherein the process variable that can be determined and / or monitored by the device (100) is a process variable that is different from the temperature of the medium, in particular a flow parameter of the fluid, in particular a flow velocity and / or a volume and / or mass flow rate, and wherein a measurement signal for the process variable, in particular the flow parameter, is generated by means of the component in contact with the medium, and wherein the device (100) for generating and / or converting the measurement signal has a movable component that executes movements during the generation and / or conversion of the measurement signal.

15. Device (100) according to claim 14, wherein the device (100) is designed for, in particular capacitively, detecting pressure fluctuations of a Kärmänn vortex street formed in the flowing fluid, the media-contacting component comprises a paddle-shaped sensor vane (10) and the movable component is a deformation body.

16. Device (100) according to claim 15, wherein a first temperature-sensitive sensor element is arranged on the paddle-shaped sensor vane (10).

17. Device (100) according to claim 16, wherein a second temperature-sensitive sensor element is arranged on the paddle-shaped sensor vane (10), wherein the second temperature-sensitive sensor element is arranged closer to the molded part (5) than the first temperature-sensitive sensor element.

18. Use of a device (100) according to one of the preceding claims 14 to 17 for detecting a process variable, in particular a flow parameter, in particular a flow velocity and / or a volume and / or mass flow rate, of a fluid flowing in a pipeline with a fluid temperature of more than 350°C and / or with a pressure of more than 250 bar, in particular a steam.

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