Sensor device

Abstract

A sensor device (1) for measuring the temperature of a surface (12) is described, the sensor device (1) comprising a mounting element (2) for mounting the sensor device (1) directly to the surface (12), a base body (3) removably attached to the mounting element (2), a sensor element (5) arranged in the interior of the base body (3), and a partition element (4) at least partially inserted into the base body (3), wherein the partition element (4) is adapted and arranged to hold the sensor element (5) in a fixed position relative to the surface (12). Furthermore, a use of the sensor device (1) and a method for assembling the sensor device (1) are described.

Description

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

[0002] Measuring the surface temperature in a high-temperature environment, as is often the case with pipes, places high demands on the equipment. The sensor must withstand high temperatures of up to 200°C and often also have to cope with high humidity and permanent vibrations, i.e. in automotive applications.

[0003] Current solutions for measuring the surface temperature of a pipe do not meet all the problems encountered. These solutions can only be operated below 120°C or are not humidity resistant (IP class below IP68). Additionally or alternatively, these solutions have a short response time (most of the current solutions used in the automotive market are based on metal tubes, with the sensing element freely mounted inside, resulting in a slow response time) or are equipped with complex mounting mechanisms (e.g. the system is wrapped around the pipe or additional mounting materials such as glue are used).

[0004] It is an object of the present disclosure to provide a sensor device which solves the above-mentioned problems.

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

[0006] According to a first aspect of the present disclosure, a sensor device is provided. The sensor device is configured for measuring the temperature of a surface, e.g. the surface temperature of a tubular component such as a pipe. The sensor device is particularly suitable for use in automotive applications.

[0007] The sensor device comprises a mounting element. The mounting element is configured for mounting the sensor device directly to a surface, e.g. the surface of a pipe, whose temperature is to be measured. Thus, the sensor device can be placed in particular close to the surface, in particular the sensor device can be placed on the surface. Thus, it is facilitated to provide a sensor device with a very fast response time and high accuracy.

[0008] The mounting element is further configured for mounting the sensor device to the surface in a releasable manner. This means that the sensor device can be placed at different positions of the surface or at different surfaces / pipes. Thus, the sensor device is particularly flexible in use.

[0009] The sensor device further comprises a base body. The base body is attached to the mounting element, in particular in a removable manner. This means that the base body can be detached from the mounting element, for example for fixing the base body to a different mounting element and thus to a different pipe surface, for example a pipe surface having a smaller or larger diameter. This makes the sensor device particularly flexible in use.

[0010] The sensor device further comprises at least one sensor element. The sensor element is arranged in the interior of the base body. The sensor element is arranged completely in the interior of the base body. The sensor element can comprise an NTC thermistor.

[0011] The sensor device further comprises a partition element. The partition element is at least partially inserted into the base body. The partition element constitutes an insert of the base body. The partition element is attached to the base body in a non-releasable manner. Preferably, the partition element is glued to the base body, for example by means of a resin.

[0012] The partition element is adapted and designed to hold the sensor element in a fixed position relative to the base body and thus relative to the surface. In particular, the partition element holds the sensor element in a position close to the surface whose temperature is to be measured. The sensor element cannot therefore move freely within the base body. In this way, the response time of the sensor device is optimized.

[0013] The sensor device is designed to operate in a high-temperature environment. Furthermore, the sensor device is designed to have very good resistance to high humidity and corrosion. Overall, a very robust, effective and flexible to apply sensor device is provided.

[0014] According to one embodiment, the sensor device comprises a locking mechanism. The locking mechanism is adapted and arranged to lock, in particular in a releasable manner, the base 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 locking element and the second locking element are adapted and arranged to mechanically cooperate with each other to lock the base body to the mounting element. In particular, the first locking element and the second locking element engage in a releasable manner to fix the position of the base body relative to the mounting element.

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

[0016] According to one embodiment, the first locking element is arranged at the separation element. In particular, the first locking element is arranged in an end side 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 device is mounted to the surface. The first locking element can comprise a protrusion extending from the separation element towards the mounting element.

[0017] According to one embodiment, the second locking element is arranged on the mounting element. The second locking element is part of the mounting element. The second locking element can comprise a recess or a cut-out of the mounting element. The first locking element is adapted and arranged to protrude through the second locking element for releasably fixing the base body to the mounting element. In this way, it is facilitated to provide a reliable sensor device which can withstand permanent vibrations.

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

[0019] The fixation springs are adapted and arranged to hold the base body in a fixed position relative to the mounting element. In particular, the at least one fixation spring, in combination with the locking mechanism, prevents the base body from falling off the mounting element during transport and application. In this way, it is facilitated to provide a reliable sensor device.

[0020] According to one embodiment, the separation element is adapted and arranged to provide an insulation of the sensor device. The separation element comprises an insulating material. In particular, the separation element comprises a plastic material, for example a polymer. Furthermore, the separation element is designed to separate the leads / wires of the sensor elements from each other and to separate the connection between the wires and the (exposed) sensor elements of the (metallic) base body. In this way, short circuits are avoided and the reliability of the sensor device is increased.

[0021] According to one embodiment, the mounting element is at least partially elastically deformable. The mounting element can comprise a spring element. Preferably, the mounting element comprises a clamping piece. In this way, the sensor device can be easily mounted to a surface whose temperature is to be measured in one step process without the need for further materials, for example glue. At the same time, the sensor device can withstand the required torque and extraction forces in automotive applications.

[0022] According to one embodiment, the sensor device is adapted to operate in the range of -40°C to +200°C. Thus, the sensor device can be applied in various applications with different requirements. The sensor device is adapted to operate in conditions with high humidity (IP68). Furthermore, the sensor device is adapted to withstand permanent vibrations, torques and extraction forces. In summary, a very robust and flexible applicable sensor device is provided.

[0023] According to another aspect, a use of a sensor device is described. The sensor device can be the previously described sensor device. All features described in connection with the sensor device apply to the use of the sensor device and vice versa.

[0024] The sensor device is used for measuring the surface temperature of a pipe. The sensor device is attached, in particular clamped, in a releasable manner to the surface of the pipe. The sensor device is adapted and designed to measure the temperature of the pipe in a very precise manner in high temperature environments (up to 200°C) with high humidity (IP68) and permanent vibrations, i.e. in automotive applications.

[0025] The design of the sensor device allows the use of only one base body for all different pipe diameters. Furthermore, the design keeps the sensor element always close to the surface whose temperature is to be measured. The design provides a high-precision measurement and a fast response time. The design allows the sensor to be easily installed to a customer interface in one step process (clamping) without the need for further additional material. In summary, an efficient and flexible sensor device for measuring the surface temperature of a pipe.

[0026] According to another aspect, a method for assembling a sensor device for measuring the surface temperature of a pipe is described. The sensor device can be the previously described sensor device. All features described in connection with the sensor device apply to the method and vice versa.

[0027] The method comprises the following steps:

[0028] A) Providing a sensor element, a base body, a separation element, a mounting element and at least two lead wires or wires. The elements can correspond to the elements of the previously described sensor device and can comprise the same features and advantages.

[0029] B) Electrically connecting the sensor element by means of the wires and introducing the sensor element and the wires into the separation element. The separation element can be an insulating element. The separation element can separate the wires from each other. The separation element can also separate the wires from possible short circuit connections to the base body.

[0030] C) Introducing the spacer element, the wire and the sensor element into the base body such that the sensor element is fixed against movement relative to the base body. In other words, by means of the spacer element, the sensor element is held in place relative to the base body, and thus relative to the pipe surface. The position of the sensor element can be a position as close as possible to the pipe surface. In this way, a fast response time and a high measurement accuracy can be guaranteed.

[0031] D) Fixing the spacer element to the base body in a non-releasable manner. Preferably, the spacer element is glued to the base body. For this purpose, a connecting element, for example a resin, can be introduced into the base body before the spacer element, the wire and the sensor element are introduced into the base body.

[0032] E) Locking the base body to the mounting element in a removable manner. The base body can be locked to the mounting element by means of the previously described locking mechanism and the fixing spring. This allows the same base body to be mounted to pipes with different parameters.

[0033] According to an embodiment, in a next step F) the sensor device is clamped to the surface of the pipe. In particular, the sensor device is mounted to the pipe surface in a simple one-step process without the need to use further materials.

[0034] Further features, improvements and conveniences become apparent from the following description of exemplary embodiments in conjunction with the attached drawings.

[0035] Figure 1 a perspective view of a sensor device attached to a surface of a pipe is schematically shown,

[0036] Figure 2 a perspective view of a sensor device according to Figure 1 is schematically shown,

[0037] Figure 3A and Figure 3B another perspective view of a sensor device according to Figure 1 is schematically shown,

[0038] Figure 4A and Figure 4B a perspective view of at least a part of a sensor device according to Figure 1 is schematically shown,

[0039] Figure 5 a cross-sectional view of a sensor device according to Figure 1 attached to a pipe is schematically shown,

[0040] Figure 6 an application of a sensor device is schematically shown.

[0041] In the drawings, elements of identical or similar structure and / or function can be denoted by identical reference signs. It is understood that the embodiments shown in the drawings are representational and not necessarily drawn to scale.

[0042] Figures 1 to 5 A sensor device 1 is shown. The sensor device 1 is configured to measure a temperature of a surface 12. The sensor device 1 is configured to be mounted directly to the surface 12 for measuring the temperature of the surface 12.

[0043] In Figure 1 and Figure 5 , the sensor device 1 is attached to the surface 12 of a pipe 11. However, the sensor device 1 is of course suitable to be attached to any other tubular component and to measure the surface temperature of any other tubular component. For the sake of clarity, in the following only the pipe 11 whose surface temperature is to be measured is referred to.

[0044] The sensor device 1 comprises a mounting element 2, a base body 3, a wiring / wire / lead 6 for electrically connecting the sensor device 1, a sensor element 5 (see Figure 5 ) and a separation element 4 (see in particular Figure 4A , Figure 4B and Figure 5 ).

[0045] The base body 3 is suitable and arranged to receive the sensor 5, at least part of the wiring 6 and at least part of the separation element 4. The base body 3 comprises a bottom side 16, an upper side 17, a first side 18 and a second side 19 Figure 4A and Figure 5 . The bottom side 16 is the side of the base body 3 closest to the surface 12 of the pipe 11 when the sensor device 1 is mounted to the surface 12 (see Figure 1 and Figure 5 ). The bottom side 16 and the upper side 17 are oppositely arranged. The first side 18 of the base body 3 is closed. The second side 19 is open. The sides 18, 19 are oppositely arranged.

[0046] The base body 3 has a high thermal conductivity. Preferably, the pipe 11 and the base body 3 comprise the same material. The base body 3 comprises a metal, preferably aluminum. The sensor element 5 comprises an NTC thermistor. The sensor element 5 is completely arranged within the base body 3. In particular, the sensor element 5 is located in the interior of the base body 3 at the bottom side 16 of the base body 3. In other words, the sensor element 5 is arranged as close as possible to the surface 12 in order to improve the measurement accuracy and to provide a very fast response time. The sensor element 5 is located close to the first, i.e. closed, side 18 of the base body 3.

[0047] The separating element 4 is at least partially, preferably almost completely, inserted into the base body 3. The separating element 4 is attached to the base body in a non-releasable manner. Preferably, the separating element 4 is glued to the base 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.

[0048] The separating element 4 comprises an oppositely arranged bottom side 23 and an upper side 24 (see Figure 5 ). The separating element 24 further comprises an oppositely arranged first side 21 and a second side 22. Once the separating element 4 is inserted into the base body 3, the first side 21 is positioned proximate, in particular adjacent to, the first side 18 (i.e. the closed side) of the base body 3. Once the separating element 4 is inserted into the base body 3, the second side 22 is positioned proximate the second side 19 (i.e. the open side) of the base body 3.

[0049] For example, as can be seen from Figure 5 , the second side 22 of the separating element 4 partially protrudes from the second side 19 of the base body 3. In other words, the separating element 4 is only partially introduced into the base body 3, which will be explained in more detail later.

[0050] The separating element 4 is configured such that it holds the sensor element 5 in place on the bottom side 16, i.e. proximate the surface 12 whose temperature is to be measured. For this purpose, the separating element 14 comprises a recess / cutout / cavity 20 (see Figure 5 ). The recess 20 is arranged in the region of the first side 21. The recess 20 extends from the first side 21 in a direction towards the second side 22. The recess 20 extends from the bottom side 23 of the separating element 4 towards the upper side 24 of the separating element 4. The recess 20 is adapted and arranged to receive the sensor element 5 such that the sensor element 5 is fixed in place relative to the base body 3 and thus relative to the surface 12. In this way, it is facilitated to provide a reliable sensor device with a fast response time.

[0051] The separating element 4 is further configured to ensure the insulation of the sensor device 1. In particular, the separating element 4 is configured to separate the two lead wires / strands 6 from each other, which are used to electrically connect the sensor element 5. The separating element 4 is further configured to separate the two lead wires / strands 6 from the metallic base body 3.

[0052] For this purpose, the separating element 4 comprises two separate cavities 25 Figure 4A and Figure 5 . It should be noted that the number of cavities 25 corresponds to the number of lead wires / strands 6. In embodiments with more than two strands 6, the number of cavities 25 is increased accordingly.

[0053] The cavities 25 are adapted and arranged to receive the wires 6 and to separate the wires 6 from each other. The cavities 25 are tubular. The cavities 25 extend parallel to each other. The cavities 25 extend from the second side face 22 of the partition element 4 all the way into the previously described recess 20. One respective lead / wire 6 is guided through one of the cavities 25 all the way to the sensor element 5. The cavities 25 enable a reliable electrical connection of the sensor element 5 while ensuring electrical insulation of the sensor arrangement 1.

[0054] The partition element 4 is further configured to releasably and firmly lock the base body 3 and thus the sensor element 5 to the mounting element 2. For this purpose, the partition element 4 comprises a first locking element 9. The first locking element 9 is arranged in an end side region 13 of the partition element 4. Figure 5 ) In particular, the first locking element 9 is arranged in a region of the second side face 22 of the partition element 4. For this purpose, as mentioned above, the second side face 22 partially protrudes from the base body 3.

[0055] The first locking element 9 and the partition element 4 are formed integrally. The first locking element 9 comprises a protrusion. The first locking element 9 is shaped like a sawtooth. The first locking element 9 protrudes from the upper side 24 of the partition element 4 in a direction away from the surface 12 of the pipe 11. The first locking element 9 protrudes from the partition element 4 towards the mounting element 2.

[0056] The sensor arrangement 1 and in particular the mounting element 2 comprises a second locking element 10. The first locking element 9 and the second locking element 10 are adapted and arranged to mechanically cooperate with each other, thereby releasably and firmly attaching / fixing the base body 3 to the mounting element 2. The first locking element 9 and the second locking element 10 constitute a locking mechanism 8 of the sensor arrangement 1. The second locking element 10 comprises a recess or a cutout of the mounting element 2, which will be described in more detail later on.

[0057] The sensor arrangement 1 comprises the previously mentioned mounting element 2, which is adapted to receive and hold the base body 3 and to attach the sensor arrangement 1 to the 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 clamping piece.

[0058] For receiving the base body 3, the mounting element 2 comprises a receiving region 26 (see for example Figure 3B and Figure 4B ). The receiving region 26 is a hollow region of the mounting element 2. In the receiving region 26, the inner diameter of the mounting element 2 is enlarged for introducing the base body 3. In other words, the base body 3 is partially introduced into the mounting element 2 from the inside of the mounting element 2.

[0059] The receiving area 26 is shaped rectangularly and comprises inner dimensions at least partly suitable for receiving the base body 3. An upper face 27 of the receiving area 26 Figure 3A and Figure 3B ) comprises the afore-mentioned second locking element 10, which is configured to mechanically cooperate with the first locking element 9 for fixing the base body 3 to the mounting element 2. The second locking element 10 constitutes a recess or cut-out in the upper face 27.

[0060] When the base body 3 is fixed to the mounting element 2, the first locking element 9 mechanically cooperates with the second locking element 10. In other words, the first locking element 9 and the second locking element 10 engage 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 partly protrudes from the second locking element 10 and protrudes beyond the upper face 27 of the mounting element 2 Figure 3A 、 Figure 3B 、 Figure 4B and Figure 5 ).

[0061] For receiving and holding the base body 3, and thus the sensor element 5 and the spacer element 4, the mounting element 2 further comprises at least one, preferably two fixation springs 7 (see in particular Figure 3A 、 Figure 3B and Figure 5 ). The fixation springs 7 extend from the upper face 27 towards the surface 12 of the pipe 11.

[0062] The fixation springs 7 constitute elastically deformable protrusions that grasp a side face of the base body 3. In particular, in this embodiment, one fixation spring 7 grasps the first, i.e. the closed, side face 18 of the base body, i.e. the side face 18 opposite to the side face comprising the locking mechanism 8 (second side face 19).

[0063] The other fixation spring 7 grasps a longitudinal side face of the base body 3, wherein a longitudinal side face is a side face extending between the first side face 18 and the second side face 19 of the base body 3. The fixation spring 7, in combination with the afore- described locking mechanism 8, prevents the base body 3, and thus the sensor element 5, from falling off during transport and application of the sensor device 1.

[0064] The mounting element 2 is further configured to directly and releasably mount the sensor device 1 to the surface 12 of the pipe 11. The mounting element 2 is suitable and arranged to at least partly enclose the surface 12 of the pipe 11. The mounting element 2 comprises an inner area 15 Figure 3A 、 Figure 3B 、 Figure 4B). The inner region 15 is configured to at least partially receive the pipe 11. The inner region 15 has a rounded and / or smooth surface 15A to reliably receive and hold the pipe 11 without damaging the pipe 11.

[0065] The mounting element 2 further comprises free end portions 14 Figure 3B and Figure 4B ). The free end portions 14 are arranged opposite to each other. One of the free end portions 14 is directly adjacent to the receiving region 26. The free end portions 14 are arc-shaped. The free end portions 14 are elastically deformable to mount the mounting element 2 to the surface 12. In particular, to attach the mounting element 2 to the surface 12, the free end portions 14 are bent apart for at least partially inserting the pipe 11 into the inner region 15 of the mounting element 2. Once the mounting element 2 is attached to the surface 12, the free end portions 14 elastically deform back towards their original position relative to each other.

[0066] In the following, the assembly of the sensor device 1 and the mounting of the sensor device 1 to the surface 12 of the pipe 11 is described.

[0067] In a first step, the sensor element 5, the base body 3, the separating element 4, the mounting element 2 and the at least two lead wires 6 are provided.

[0068] In a next step, the sensor element 5 and the two lead wires 6 are mechanically and electrically connected. Then, the sensor element 5 and the lead wires 6 are mounted into the separating element 4, whereby the lead wires 6 are introduced into the cavity 25 of the separating element 4.

[0069] In a next step, a connecting element, e.g. glue / resin, is introduced into the base body 3.

[0070] In a further step, the separating element 4, the lead wires 6 and the sensor element 5 are introduced into the base body 3, such that the sensor element 5 is arranged at the bottom side 16 of the base body 3. The separating element 4 is fixed to the base body 3 in a non-removable manner by means of the connecting element, e.g. glue / resin.

[0071] In a next step, the base body 3 is releasably fixed to the mounting element 2 by means of the locking mechanism 8 and the fixation spring 7 as described above.

[0072] In a next step, the sensor device 1 is mounted to the surface 12 of the pipe 11 in one step without using additional material. In particular, the sensor device 1 is clamped to the surface 12 of the pipe 11. Thereby, the free end portions 14 of the mounting element 2 are elastically deformed, such that the surface 12 of the pipe 11 can be introduced into the inner region 15. Thereafter, the free end portions 14 deform back towards their initial position.

[0073] Figure 6 Possible applications of the above-described sensor device 1 are schematically shown. In particular, Figure 6 Different possible positions 28 of the sensor device 1 in a heat pump application 32 are illustrated. Thereby, reference numeral 29 denotes a compressor, reference numeral 30 denotes an external condenser, and reference numeral 31 denotes an internal condenser in the heat pump application 32. Of course, the sensor device 1 can be used in a wide range of other applications with a pipe on which the sensor device 1 can be clamped.

[0074] Reference numerals

[0075] 1 sensor device

[0076] 2 mounting element

[0077] 3 base body

[0078] 4 separating element

[0079] 5 sensor element

[0080] 6 wiring / wire / lead

[0081] 7 securing spring

[0082] 8 locking mechanism

[0083] 9 first locking element

[0084] 10 second locking element

[0085] 11 pipe

[0086] 12 surface

[0087] 13 end-side region

[0088] 14 free end

[0089] 15 inner region

[0090] 15A surface

[0091] 16 bottom-side portion

[0092] 17 upper-side portion

[0093] 18 first side portion face

[0094] 19 second side portion face

[0095] 20 recess / cutout / cavity

[0096] 21 first side portion face

[0097] 22 second side portion face

[0098] 23 bottom-side portion

[0099] 24 upper-side portion

[0100] 25 cavity

[0101] 26 receiving area

[0102] 27 upper face

[0103] 28 position

[0104] 29 compressor

[0105] 30 external condenser

[0106] 31 internal condenser

[0107] 32 heat pump application

Claims

1. Sensor device (1) for measuring the temperature of a surface (12), comprising: - a mounting element (2) for mounting the sensor device (1) directly to the surface (12), - a base body (3) removably attached to the mounting element (2), - at least one sensor element (5) arranged in the interior of the base body (3), - a partition element (4) at least partially inserted into the base body (3), wherein the partition element (4) is adapted and arranged to hold the sensor element (5) in a fixed position relative to the base body (3), and - a locking mechanism (8) adapted and arranged to lock the base body (3) to the mounting element (2), wherein the locking mechanism (8) comprises at least one first locking element (9) and at least one second locking element (10) adapted and arranged to mechanically cooperate with each other to lock the base body (3) to the mounting element (2), wherein the first locking element (9) is arranged at the partition element (4) and wherein the first locking element (9) extends in a direction away from the surface (12) once the sensor device (1) is mounted to the surface (12), wherein the first locking element (9) is part of the partition element (4).

2. Sensor device (1) according to claim 1, wherein the second locking element (10) is arranged on the mounting element (2).

3. Sensor device (1) according to claim 1 or 2, wherein the first locking element (9) comprises a protrusion and wherein the second locking element (10) comprises a recess.

4. Sensor device (1) according to claim 1 or 2, wherein, the mounting element (2) comprises at least one fixation spring (7) adapted and arranged to hold the base body (3) in a fixed position relative to the mounting element (2).

5. Sensor device (1) according to claim 1 or 2, wherein the partition element (4) is adapted and arranged to provide insulation of the sensor device (1).

6. Sensor device (1) according to claim 1 or 2, wherein the mounting element (2) comprises a clamp.

7. Sensor device (1) according to claim 1 or 2, wherein the sensor device (1) is adapted to be mounted to the surface (12) in a single step.

8. Sensor device (1) according to claim 1 or 2, wherein the sensor element (5) comprises an NTC thermistor.

9. Sensor device (1) according to claim 1 or 2, wherein, the sensor device (1) is adapted to be operated in a range of -40°C to +200°C.

10. Sensor device (1) according to claim 1 or 2, wherein The sensor device (1) is adapted to measure the surface temperature of a pipe (11).

11. Use of a sensor device (1) according to any one of claims 1 to 10 for measuring the surface temperature of a pipe (11), wherein, The sensor device (1) is clamped to a surface (12) of the pipe (11).

12. A method for assembling a sensor device (1) according to any one of claims 1 to 10 for measuring the surface temperature of a pipe (11), the method comprising the following steps: A) providing a sensor element (5), a base body (3), a separation element (4), a mounting element (2) and at least two wires (6); B) electrically connecting the sensor element (5) by means of the wires (6) and introducing the sensor element (5) and the wires (6) into the separation element (4); C) introducing the separation element (4), the wires (6) and the sensor element (5) into the base body (3) such that the sensor element (5) is fixed against movement relative to the base body (3); D) fixing the separation element (4) to the base body (3) in a non-releasable manner; E) removably locking the base body (3) to the mounting element (2).

13. The method according to claim 12, wherein, In a next step F) the sensor device (1) is clamped to a surface (12) of a pipe (11).

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