Sensor Configuration

Abstract

A sensor arrangement (1) for measuring the temperature of a surface (12) is described, the sensor arrangement (1) including a mounting element (2) for directly mounting the sensor arrangement (1) to the surface (12), a basic body (3) removably mounted to the mounting element (2), a sensor element (5) disposed within the basic body (3), and a separation element (4) at least partially inserted within the basic body (3), the separation element (4) constructed and arranged to hold the sensor element (5) in a fixed position relative to the surface (12). Additionally, methods of using the sensor arrangement (1) and assembling the sensor arrangement (1) are described.

Description

[Technical field]

[0001] The present invention relates to a sensor arrangement for measuring the temperature of a surface, in particular the surface of a pipe.Furthermore, the present invention relates to the use of the sensor arrangement for measuring the surface temperature of a pipe.Furthermore, the present invention relates to a method for assembling a sensor arrangement for measuring the surface temperature of a pipe. [Background technology]

[0002] Measuring surface temperatures in high temperature environments, as is common in the case of pipes, places great demands on the equipment: the sensors must withstand high temperatures up to 200°C and often also deal with high humidity and permanent vibration, i.e. automotive applications.

[0003] Current solutions for measuring the surface temperature of pipes do not meet all the problems faced: they can either only operate up to 120°C or are not moisture resistant (IP rating lower than IP68). Additionally or alternatively, they have a short response time (most of the current solutions for the automotive market are based on metal tubes, with the sensing element loosely mounted inside, leading to short response times) or they are equipped with complex mounting mechanisms (for example wrapping systems around the pipes or they use additional mounting materials such as adhesives). Summary of the Invention [Problem to be solved by the invention]

[0004] It is an object of the present disclosure to provide a sensor configuration that overcomes the above-mentioned problems. [Means for solving the problem]

[0005] This object is solved by a sensor arrangement, a use of the sensor arrangement and a method according to the independent claims.

[0006] According to a first aspect of the present disclosure, there is provided a sensor arrangement configured to measure a temperature of a surface, for example a surface temperature of a tubular component such as a pipe, the sensor arrangement being particularly configured for use in automotive applications.

[0007] The sensor arrangement includes a mounting element configured for mounting the sensor arrangement directly to a surface whose temperature is to be measured, for example the surface of a pipe, so that the sensor arrangement can be located particularly close to the surface, in particular the sensor arrangement can be located on the surface, thus facilitating the provision of a sensor arrangement with a very fast response time and high accuracy.

[0008] The mounting element is further configured to releasably mount the sensor arrangement to a surface, meaning that the sensor arrangement can be positioned at different locations on the surface or on different surfaces / pipes, so the sensor arrangement is particularly flexible in use.

[0009] The sensor arrangement further comprises a basic body. The basic body is attached, in particular removably attached, to the mounting element. This means that the basic body can be removed from the mounting element, for example, in order to fasten the basic body to a different mounting element and thus to a different pipe surface, for example a pipe surface with a smaller diameter or a smaller diameter. This makes the sensor arrangement particularly flexible during use.

[0010] The sensor arrangement further includes at least one sensor element. The sensor element is disposed inside the basic body. The sensor element is disposed entirely inside the basic body. The sensor element may include an NTC thermistor.

[0011] The sensor arrangement further comprises a separation element. The separation element is at least partially inserted into the basic body. The separation element constitutes an insert of the basic body. The separation element is non-releasably attached to the basic body. Preferably, the separation element is glued to the basic body, for example by means of a resin.

[0012] The separating element is constructed and arranged to hold the sensor element in a fixed position relative to the basic body and thus relative to the surface. In particular, the separating element holds the sensor element in a position close to the surface whose temperature is to be measured. Thus, the sensor element cannot move freely inside the basic body. In this way, the response time of the sensor arrangement is optimized.

[0013] The sensor configuration is designed to operate in high temperature environments. Furthermore, the sensor configuration is designed to have very good performance against high humidity and high corrosion. Overall, a very robust, efficient and flexibly applicable sensor configuration is provided.

[0014] According to one embodiment, the sensor arrangement comprises a locking mechanism. The locking mechanism is configured to lock, in particular releasably lock, the basic body to the mounting element. The locking mechanism comprises at least one, preferably exactly one, first locking element. The locking mechanism comprises at least one, preferably exactly one, second locking element. The first and second locking elements are configured and arranged to mechanically cooperate with each other to lock the basic body to the mounting element. In particular, the first and second locking elements releasably engage to fix the position of the basic body relative to the mounting element.

[0015] This allows the sensor arrangement to withstand the vibration conditions specified in the automotive market. Furthermore, the releasable lock between the basic body and the mounting element allows the same basic body of the sensor arrangement to be mounted on pipes having different diameters.

[0016] According to one embodiment, the first locking element is arranged on the separation element. In particular, the first locking element is arranged in an end region of the separation element. The first locking element is part of the separation element. In particular, the separation element and the first locking element are integrally formed. The first locking element extends in a direction away from the surface of the pipe once the sensor arrangement is attached to the surface. The first locking element may include a protrusion extending from the separation element towards the attachment element.

[0017] According to one embodiment, the second locking element is disposed on the mounting element. The second locking element is part of the mounting element. The second locking element may include a recess or a notch in the mounting element. The first locking element is configured and arranged to protrude through the second locking element to releasably secure the basic body to the mounting element. In this way, the provision of a reliable sensor configuration capable of withstanding permanent vibration is facilitated.

[0018] According to one embodiment, the mounting element comprises at least one fastening spring. Preferably, the mounting element comprises two fastening springs. However, the mounting element can also comprise more than two fastening springs, for example three fastening springs. The mounting element and the fastening spring are integrally formed. In other words, the fastening spring is part of the mounting element.

[0019] The locking spring is constructed and arranged to hold the basic body in a fixed position relative to the mounting element. In particular, the at least one locking spring prevents the basic body from falling off the mounting element during delivery and application in combination with the locking mechanism. In this way, providing a reliable sensor configuration is facilitated.

[0020] According to one embodiment, the separating element is constructed and arranged to provide insulation of the sensor arrangement. The separating element comprises an insulating material. In particular, the separating element comprises a plastic material, e.g. a polymer. Furthermore, the separating element is designed to separate the leads / wires of the sensor element from each other and to separate the connections between the wires and the (exposed) sensor element of the (metal) basic body. In this way, short circuits are avoided and the reliability of the sensor arrangement is increased.

[0021] According to one embodiment, the mounting element is at least partially elastically deformable. The mounting element may include a spring element. Preferably, the mounting element includes a clip. In this way, the sensor arrangement can be easily attached to a surface and the temperature of the surface is measured in a one-step process without the need for additional materials, e.g. adhesives. At the same time, the sensor arrangement can withstand the required torque and extraction forces in automotive applications.

[0022] According to one embodiment, the sensor arrangement is configured to operate within the range of -40°C to +200°C. The sensor arrangement can therefore be applied to a wide range of applications with diverse requirements. The sensor arrangement is configured to operate under high humidity (IP68) conditions. Furthermore, the sensor arrangement is configured to withstand permanent vibrations, torque and extraction forces. Overall, a very robust and flexibly applicable sensor arrangement is provided.

[0023] According to a further aspect, a use of the sensor configuration is described. The sensor configuration may be a sensor configuration as described above. All features described in relation to the sensor configuration apply to the use of the sensor configuration and vice versa.

[0024] The sensor arrangement is used to measure the surface temperature of a pipe. The sensor arrangement is releasably attached, in particular clipped, to the surface of the pipe. The sensor arrangement is configured and designed to measure the temperature of the pipe in a very accurate manner in high humidity (IP68) and permanent vibration, i.e. high temperature environments (up to 200°C) in automotive applications.

[0025] The design of the sensor configuration makes it possible to use only one basic body for all different pipe diameters. Moreover, this design always brings the sensor element close to the surface whose temperature is to be measured. It provides high accuracy of measurement and fast response. This design allows the sensor to be easily attached to the customer interface in a one-step process (clip-on) without using further additional materials. Overall, a highly efficient and flexible sensor configuration is used to measure the surface temperature of the pipe.

[0026] According to a further aspect, a method of assembling a sensor arrangement for measuring the surface temperature of a pipe is described. The sensor arrangement may be a sensor arrangement as described above. All the configurations described in relation to the sensor arrangement apply to this method and vice versa.

[0027] The method includes the following steps.

[0028] A) Providing a sensor element, a basic body, a separation element, a mounting element and at least two leads or wires, said elements may correspond to those of the sensor configurations described above and may include the same configurations and advantages.

[0029] B) electrically connecting the sensor element with a wire and introducing the sensor element and the wire into an isolation element. The isolation element may be an insulating element. The isolation element may isolate the wires from each other. The isolation element may further isolate the wires from a possible short-circuit connection to the basic body.

[0030] C) Introducing the separation element, the wire and the sensor element into the basic body such that the sensor element is fixed against movements relative to the basic body. In other words, by means of the separation element, the sensor element is held in its position relative to the basic body and thus relative to the pipe surface. The position of the sensor element can be as close as possible to the pipe surface. In this way, fast response times and high measurement accuracy can be ensured.

[0031] D) Non-releasably fixing the separation element to the basic body. Preferably, the separation element is glued to the basic body. For this purpose, a connecting element (e.g. resin) may be introduced into the basic body before introducing the separation element, the wire and the sensor element into the basic body.

[0032] E) Removable locking of the basic body to the mounting element. The basic body may be locked to the mounting element using the aforementioned locking mechanism and fixing spring. This allows the same basic body to be mounted on pipes with different parameters.

[0033] According to one embodiment, in a next step F, the sensor arrangement is clipped onto the surface of the pipe. In particular, the sensor arrangement is attached to the pipe surface in a simple one-step process without the use of additional materials.

[0034] Further configurations, improvements and advantages will become apparent from the following description of exemplary embodiments taken in conjunction with the drawings. [Brief description of the drawings]

[0035] [Figure 1] FIG. 2 shows a schematic perspective view of a sensor arrangement mounted on the surface of a pipe. [Diagram 2] 2 shows a schematic perspective view of the sensor arrangement according to FIG. 1; [Figure 3A] 2 shows a further perspective view of the sensor arrangement according to FIG. 1; [Figure 3B] 2 shows a further perspective view of the sensor arrangement according to FIG. 1; [Figure 4A] 2 shows a schematic perspective view of at least a part of the sensor arrangement according to FIG. 1; [Figure 4B] 2 shows a schematic perspective view of at least a part of the sensor arrangement according to FIG. 1; [Diagram 5] FIG. 2 shows a schematic cross-sectional view of a pipe-mounted sensor arrangement according to FIG. 1; [Figure 6] 1 illustrates a schematic application of the sensor configuration; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] In the figures, elements of the same structure and / or functionality may be referred to by the same reference numerals. It should be understood that the embodiments shown in the figures are illustrative representations and are not necessarily drawn to scale.

[0037] 1 to 5 show a sensor arrangement 1. The sensor arrangement 1 is configured to measure the temperature of a surface 12. The sensor arrangement 1 is configured to be directly attached to the surface 12 for measuring the temperature of the surface 12.

[0038] In Figures 1 and 5 the sensor arrangement 1 is attached to the surface 12 of a pipe 11. However, the sensor device 1 can of course be attached to any further tubular component and configured to measure its surface temperature. For clarity, in the following only reference is made to the pipe 11 whose surface temperature is to be measured.

[0039] The sensor arrangement 1 includes a mounting element 2, a basic body 3, wiring / wires / leads 6 for electrically connecting the sensor arrangement 1, a sensor element 5 (see FIG. 5), and a separating element 4 (see in particular FIGS. 4A, 4B and 5).

[0040] The basic body 3 is constructed and arranged to receive the sensor 5, at least a portion of the wiring 6 and at least a portion of the separation element 4. The basic body 3 comprises a bottom side 16, a top side 17, a first side 18 and a second side 19 (Figures 4A and 5). The bottom side 16 is the side of the basic body 3 that is closest to the surface 12 of the pipe 11 once the sensor arrangement 1 is attached to the surface 12 (see Figures 1 and 5). The bottom side 16 and the top side 17 are arranged oppositely. The first side 18 of the basic body 3 is closed. The second side 19 is open. The sides 18, 19 are arranged oppositely.

[0041] The basic body 3 has a high thermal conductivity. Preferably, the pipe 11 and the basic body 3 comprise the same material. The basic body 3 comprises a metal, preferably aluminum. The sensor element 5 comprises an NTC thermistor. The sensor element 5 is arranged completely within the basic body 3. In particular, the sensor element 5 is arranged inside the basic body 3 at a bottom side 16 of the basic body 3. In other words, the sensor element 5 is arranged as close as possible to the surface 12 in order to increase the measurement accuracy as well as to provide a very fast response time. The sensor element 5 is arranged close to a first (i.e. closed) side 18 of the basic body 3.

[0042] The separating element 4 is at least partially, preferably almost completely, inserted into the basic body 3. The separating element 4 is non-releasably attached to the basic body. Preferably, the separating element 4 is glued to the basic body, for example by means of a resin. The separating element 4 comprises an insulating material. The separating element 4 comprises a plastic, preferably a polymer.

[0043] The separation element 4 comprises an oppositely arranged bottom side 23 and a top side 24 (see FIG. 5 ). The separation element 24 further comprises an oppositely arranged first side 21 and a second side 22. The first side 21 is arranged close to, in particular adjacent to, the first side 18 (i.e. the closed side) of the basic body 3 once the separation element 4 is inserted into the basic body 3. The second side 22 is arranged close to, in particular adjacent to, the second side 19 (i.e. the open side) of the basic body 3 once the separation element 4 is inserted into the basic body 3.

[0044] The second side 22 of the separation element 4 partially projects from the second side 19 of the basic body 3, as can be seen for example from Fig. 5. In other words, the separation element 4 is only partially introduced into the basic body 3, which will be explained in more detail later.

[0045] The separation element 4 is configured in such a way that it holds the sensor element 5 in its position on the bottom side 16, i.e. in close proximity to the surface 12, the temperature of which is to be measured. For this purpose, the separation element 14 comprises an indentation / cut-out / cavity 20 (see FIG. 5 ). The indentation 20 is arranged in the region of the first side 21. The indentation 20 extends in a direction from the first side 21 towards the second side 22. The indentation 20 extends from the bottom side 23 of the separation element 4 towards the top side 24 of the separation element 4. The indentation 20 is configured and arranged to receive the sensor element 5 such that the sensor element 5 is fixed in its position relative to the basic body 3 and thus relative to the surface 12. In this way, the provision of a reliable sensor arrangement with a fast response time is facilitated.

[0046] The separating element 4 is further configured to ensure the insulation of the sensor arrangement 1. In particular, the separating element 4 is configured to separate two leads / wires 6 from each other, the leads / wires 6 being used to electrically connect the sensor elements 5. The separating element 4 is further configured to separate the two leads / wires 6 from the metallic basic body 3.

[0047] For this purpose, the separation element 4 comprises two separate cavities 25 (FIGS. 4A and 5). It should be noted that the number of cavities 25 corresponds to the number of leads / wires 6. In embodiments having more than two wires 6, the number of cavities 25 is increased accordingly.

[0048] The cavities 25 are configured to receive the wires 6 and separate them from one another. The cavities 25 are tubular shaped. The cavities 25 run parallel to one another. They extend from the second side 22 of the separation element 4 up to said recess 20. One respective lead / wire 6 is led through one of said cavities 25 to the sensor element 5. The cavities 25 allow a reliable electrical connection of the sensor element 5 while ensuring electrical insulation of the sensor arrangement 1.

[0049] The separation element 4 is further configured for securely and releasably locking the basic body 3 and thus the sensor element 5 to the mounting element 2. For this purpose, the separation element 4 comprises a first locking element 9. The first locking element 9 is arranged in an end side region 13 of the separation element 4 (FIG. 5). In particular, the first locking element 9 is arranged in the region of a second side surface 22 of the separation element 4. For this purpose, the second side surface 22 partially protrudes from the basic body 3 as described above.

[0050] The first locking element 9 and the separation element 4 are integrally formed. The first locking element 9 comprises a protrusion. The first locking element 9 is shaped as a sawtooth. The first locking element 9 protrudes from the upper side 24 of the separation element 4 in a direction away from the surface 12 of the pipe 11. The first locking element 9 protrudes from the separation element 4 towards the attachment element 2.

[0051] The sensor arrangement 1, in particular the mounting element 2, comprises a second locking element 10. The first and second locking elements 9, 10 are constructed and arranged to mechanically cooperate with one another to securely releasably attach / secure the basic body 3 to the mounting element 2. The first and second locking elements 9, 10 constitute a locking mechanism 8 of the sensor arrangement 1. The second locking element 10 comprises a recess or notch in the mounting element 2, which will be described in more detail later.

[0052] The sensor arrangement 1 comprises the aforementioned mounting element 2, which is configured to receive and hold the basic body 3 to mount the sensor arrangement 1 to a surface 12 of the pipe 11. The mounting element 2 comprises a metal, for example stainless steel. The mounting element 2 is at least partially elastically deformable. The mounting element 2 comprises a clip.

[0053] To receive the basic body 3, the attachment element 2 comprises a receiving area 26 (see, for example, Figures 3B and 4B). The receiving area 26 is a hollow area of ​​the attachment element 2. In the receiving area 26, the inner diameter of the attachment element 2 is enlarged to introduce the basic body 3. In other words, the basic body 3 is partially introduced into the attachment element 2 from inside the attachment element 2.

[0054] The receiving area 26 is rectangularly shaped and includes internal dimensions suitable for at least partially receiving the basic body 3. An upper surface 27 (FIGS. 3A and 3B) of the receiving area 26 includes the aforementioned second locking element 10, which is configured to mechanically cooperate with the first locking element 9 to secure the basic body 3 to the attachment element 2. The second locking element 10 constitutes a recess or notch in the upper surface 27.

[0055] When the basic body 3 is fixed to the mounting element 2, the first locking element 9 is brought into mechanical cooperation with the second locking element 10. In other words, the first and second locking elements 9, 10 engage with each other. In particular, the first locking element 9 is received by the second locking element 10. The first locking element 9 is introduced into the second locking element 10 such that the first locking element 9 partially protrudes from the second locking element 10 and is out of the upper surface 27 of the mounting element 2 (Figures 3A, 3B, 4B and 5).

[0056] For receiving and holding the basic body 3 and thus the sensor element 5 and the separation element 4, the mounting element 2 further comprises at least one, preferably two, fixing springs 7 (see in particular Figures 3A, 3B and 5). The fixing springs 7 extend from the upper surface 27 towards the surface 12 of the pipe 11.

[0057] The fixing springs 7 constitute resiliently deformable tabs which grip the sides of the basic body 3. In particular, in this embodiment, one fixing spring 7 grips the first (i.e. closed) side 18 of the basic body, i.e. the side 18 opposite to the side containing the locking mechanism 8 (second side 19).

[0058] Furthermore, the fixing spring 7 grips the longitudinal sides of the basic body 3, the longitudinal sides being the sides extending between the first side 18 and the second side 19 of the basic body 3. The fixing spring 7 prevents the basic body 3, and thus the sensor element 5, in combination with the aforementioned locking mechanism 8, from falling off during delivery and application of the sensor arrangement 1.

[0059] The mounting element 2 is further configured to directly and releasably mount the sensor arrangement 1 to the surface 12 of the pipe 11. The mounting element 2 is adapted and arranged to at least partially surround the surface 12 of the pipe 11. The mounting element 2 includes an interior region 15 (FIGS. 3A, 3B and 4B). The interior region 15 is configured to at least partially receive the pipe 11. The interior region 15 has a rounded and / or smooth surface 15A to securely receive and hold the pipe 11 without damaging the pipe 11.

[0060] The mounting element 2 further includes free ends 14 (FIGS. 3B and 4B). The free ends 14 are disposed opposite one another. One of the free ends 14 directly follows the receiving area 26. The free ends 14 are arcuately shaped. The free ends 14 are elastically deformable for attaching the mounting element 2 to the surface 12. In particular, to attach the mounting element 2 to the surface 12, the free ends 14 are bent apart to insert the pipe 11 at least partially into the inner region 15 of the mounting element 2. Once the mounting element 2 is attached to the surface 12, the free ends 14 elastically deform back towards their original position relative to one another.

[0061] In the following, the assembly of the sensor arrangement 1 and its attachment to the surface 12 of the pipe 11 will be described.

[0062] In a first step, a sensor element 5, a basic body 3, an isolation element 4, a mounting element 2 and at least two leads / wires 6 are provided.

[0063] In a next step, the sensor element 5 and the two leads / wires 6 are mechanically and electrically connected. The sensor element 5 and the wires 6 are then attached to the isolation element 4, whereby the wires 6 are introduced into the cavity 25 of the isolation element 4.

[0064] In a next step, a connecting element (eg glue / resin) is introduced into the basic body 3 .

[0065] In a further step, the separation element 4, the wire 6 and the sensor element 5 are introduced into the basic body 3 such that the sensor element 5 is arranged on the bottom side 16 of the basic body 3. The separation element 4 is non-removably fixed to the basic body 3 by means of a connecting element, e.g. glue / resin.

[0066] In a next step the basic body 3 is releasably fixed to the attachment element 2 using the locking mechanism 8 and the fixing spring 7 as described above.

[0067] In a next step, the sensor arrangement 1 is attached in one step to the surface 12 of the pipe 11 without using any further material. In particular, the sensor arrangement 1 is clipped to the surface 12 of the pipe 11. Thereby, the free ends 14 of the attachment element 2 are elastically deformed so that the surface 12 of the pipe 11 can be introduced into the inner region 15. Thereafter, the free ends 14 are deformed back towards their initial position.

[0068] Figure 6 shows diagrammatically possible applications of the above-mentioned sensor arrangement 1. In particular, Figure 6 shows different possible locations 28 of the sensor arrangement 1 in a heat pump application 32. Thereby, reference number 29 refers to the compressor in the heat pump application 32, reference number 30 refers to the outer condenser and reference number 31 refers to the inner condenser. Of course, the sensor arrangement 1 can be used in a wide range of other applications having pipes to which the sensor arrangement 1 can be clipped. [Explanation of symbols]

[0069] 1 Sensor configuration 2 Mounting elements 3 Basic body 4 Separation elements 5 Sensor elements 6 Wires / Leads 7 Fixed spring 8 Locking mechanism 9 First Locking Element 10 Secondary Locking Element 11 Pipe 12 Surface 13 End area 14 Free end 15 Inner area 15A surface 16 Bottom side 17 Upper 18 First aspect 19 The second aspect 20 Dent / Notch / Cavity 21 First aspect 22 The Second Aspect 23 Bottom side 24 Upper 25 Cavity 26 Reception Area 27 Top 28 Location 29 Compressor 30 Outer Capacitor 31 Inner Capacitor 32 Heat pump applications

Claims

1. 1. A sensor arrangement for measuring a temperature of a surface, comprising: a mounting element for mounting the sensor arrangement directly to the surface; a base body removably attached to the attachment element; At least one sensor element arranged inside said basic body; a separation element at least partially inserted into said basic body; a locking mechanism constructed and arranged to lock the base body to the mounting element; the separation element is constructed and arranged to hold the sensor element in a fixed position relative to the base body; the locking mechanism includes at least one first locking element and at least one second locking element constructed and arranged to mechanically cooperate with each other to lock the basic body to the mounting element; the first locking element is disposed on the separation element, the first locking element extending away from the surface once the sensor arrangement is attached to the surface; Sensor configuration.

2. The sensor arrangement of claim 1 , wherein the first locking element is part of the isolation element.

3. The sensor arrangement of claim 1 or 2, wherein the second locking element is part of the mounting element.

4. The sensor arrangement of claim 1 or 2, wherein the second locking element is disposed on the mounting element.

5. The sensor arrangement of any preceding claim, wherein the first locking element comprises a protrusion and the second locking element comprises a recess.

6. A sensor arrangement according to any one of claims 1 to 5, wherein the mounting element comprises at least one fixing spring constructed and arranged to hold the basic body in a fixed position relative to the mounting element.

7. A sensor arrangement according to any preceding claim, wherein the isolation element is constructed and arranged to provide insulation of the sensor arrangement.

8. The sensor arrangement of any preceding claim, wherein the mounting element comprises a clip.

9. A sensor arrangement according to any one of claims 1 to 8, wherein the sensor arrangement is configured to be attached to the surface in a single step.

10. The sensor arrangement of any preceding claim, wherein the sensor element comprises an NTC thermistor.

11. A sensor arrangement according to any preceding claim, wherein the sensor arrangement is configured to operate within the range of -40°C to +200°C.

12. The sensor arrangement according to any one of claims 1 to 11, wherein the sensor arrangement is configured to measure a surface temperature of a pipe.

13. 2. A method of using a sensor arrangement for measuring the temperature of a surface according to claim 1, comprising the steps of: The sensor arrangement is used to measure a surface temperature of a pipe; The sensor arrangement is clipped onto a surface of the pipe. method.

14. 10. A method of assembling a sensor arrangement for measuring the temperature of a surface according to claim 1, comprising the steps of: The sensor arrangement is for measuring a surface temperature of a pipe, the method comprising: A) providing a sensor element, a base body, a separation element, a mounting element and at least two wires; B) electrically connecting the sensor element with the wire and introducing the sensor element and the wire into the separation element; C) introducing the separation element, the wire and the sensor element into the basic body such that the sensor element is fixed against movements relative to the basic body; D) non-releasably fixing said separation element to said basic body; E) releasably locking the base body to the mounting element. method.

15. 15. The method according to claim 14, wherein in a next step F) the sensor arrangement is clipped to a surface of the pipe.

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