Sensor, main body for a sensor and method for mounting a sensor

Abstract

To achieve simple and rapid mounting of a sensor using structurally simple means, the invention provides a sensor having a main body (1), a sensor element (2), a sensor cable (3) for electrically contacting the sensor element (2), and a housing (4) for receiving at least one part of the sensor element (2), at least one part of the main body (1), and at least one part of the sensor cable (3), said sensor being configured and developed in such a way that the main body (1) and / or the housing (4) have or has at least one first engagement element (5) and at least one second engagement element (6) for engagement between the main body (1) and the housing (4), such that, on coupling of the housing (4) to the main body (1), a clamping and / or latching connection can be achieved between the housing (4) and the main body (1) by means of the at least one first engagement element (5), and a clamping and / or latching connection between the housing (4), the main body (1) and the sensor cable (3) can be achieved by means of the at least one second engagement element (6). The invention further provides a corresponding main body (1) for such a sensor and a method for mounting such a sensor.

Description

[0001] SENSOR, BASE BODY FOR A SENSOR AND METHOD FOR MOUNTING A SENSOR

[0002] The invention relates to a sensor comprising a base body, a sensor element, a sensor cable for electrical contacting the sensor element and a housing for receiving at least one part of the sensor element, at least one part of the base body and at least one part of the sensor cable.

[0003] Furthermore, the present invention relates to a base body for such a sensor and a method for mounting such a sensor.

[0004] Sensors of the type mentioned above are known from practical experience and exist in various designs. For example, wired sensors have a cable for power supply and signal transmission. This cable is connected to a sensor housing. The individual wires inside the cable are electrically connected to the circuit board or printed circuit board located in the sensor housing. This is usually done by soldering. Another connection technology is bonding with conductive or contact adhesives. With these connection technologies, there is a risk that, if exposed to a

[0005] Tensile, torsional, and / or bending forces can cause the connection—that is, the electrical contact between the sensor's circuit board and the individual wires of the cable—to loosen. If sufficient space is available, screw terminals or connectors can also be used, but these require a relatively large installation space and are expensive.

[0006] Wired sensors can be protected from damage by a mechanical strain relief device. Common strain relief devices used in electrical engineering include cable clamps, cable ties, perforated plates (two-hole and three-hole plates), cable glands, cable conduits, and cable strain relief socks. Cable glands are frequently used for strain relief. A cable gland consists of several components (cap nut, sealing insert, and spigot), which makes installation somewhat complex. A seal (elastomer or rubber) is located directly against the cable. Above the seal is a housing with a threaded end. When the housing is tightened with the cap nut, the space between the housing and the cable decreases, consequently pressing the seal against the cable inside. The cable is thus protected against certain tensile forces.A well-known cable gland is shown, for example, in DE 10 2005 035 210 A1.

[0007] In addition to strain relief, cable glands have another important feature: the integrated seal prevents foreign objects or liquids from entering the sensor. Different cable gland designs offer varying degrees of protection. A minimum protection rating of IP54 is required for cable glands. Sensor housings must be designed to accommodate the cable gland.

[0008] Sensors typically consist of three main components:

[0009] 1) Sensitive area (sensor element):

[0010] The sensitivity range is technology-dependent. Different technologies are available depending on the application. For example, inductive sensors use a coil to generate an electromagnetic field, which induces eddy currents in metallic objects. The sensor can detect this change.

[0011] 2) Evaluation electronics:

[0012] The measured physical quantity is converted into an electrical quantity.

[0013] 3) Signal output:

[0014] The electronics of the signal output transmit the electrical quantity to a connected control system and / or evaluation system.

[0015] The main components can be fully integrated – a process known as "fully integrated" – or only partially housed within a sensor enclosure. For example, only the sensitive area – the sensor element or sensor head – might be contained within a sensor enclosure (e.g., a round metal housing). The sensor enclosure protects the sensor components from external influences (e.g., foreign objects, liquids, or electromagnetic interference). Depending on the application (e.g., different requirements), various materials can be used for sensor enclosures. High-quality versions are typically made of stainless steel. Different levels of protection can be achieved by combining the housing with sealing elements.

[0016] The state of the art involves screwing the sensor housing to the remaining components or to a component carrier (the "sensor interior"). Potting or bonding with thermoplastic or thermosetting plastics is also known. In these methods, the sensor components are positioned in the sensor housing and then encased in a plastic matrix that is initially liquid. Furthermore, sensor housings are known that are fixed to the components or the component carrier via snap-fit ​​tabs. These snap-fit ​​tabs can be located on the components, on the component carrier, or on the sensor housing.

[0017] Besides their primary function of measuring a physical quantity, sensors or sensor heads usually have to fulfill one or more of the following functions:

[0018] • Securing the internal components to the sensor housing

[0019] • Sealing against external influences

[0020] • Strain relief for the connected cable

[0021] The currently used housings require separate components to fulfill the aforementioned functions. This necessitates a separate work step for each function, making sensor assembly time-consuming and costly.

[0022] The present invention is therefore based on the objective of providing a sensor, a base body for such a sensor and a method for mounting such a sensor, whereby simple and quick mounting of a sensor using structurally simple means is made possible.

[0023] According to the invention, the foregoing problem is solved by a sensor having the features of claim 1, by a base body having the features of claim 14 and by a method for mounting a sensor having the features of claim 15.

[0024] According to claim 1, the sensor is designed and further developed such that the base body and / or the housing has at least one first engagement element and at least one second engagement element for engagement between the base body and the housing, such that when the housing is coupled to the base body, a clamping and / or locking connection between the housing and the base body can be realized by means of the at least one first engagement element and a clamping and / or locking connection between the housing, the base body and the sensor cable can be realized by means of the at least one second engagement element.

[0025] Furthermore, according to claim 14, a base body for such a sensor is specified, wherein the base body has at least one first engagement element and at least one second engagement element for engagement between the base body and a housing, such that when the housing is coupled to the base body, a clamping and / or snap connection between the housing and the base body can be realized by means of the at least one first engagement element and a clamping and / or snap connection between the housing, the base body and a sensor cable can be realized by means of the at least one second engagement element, wherein the base body can have a recess or groove for receiving a sealing means.

[0026] Furthermore, according to claim 15, the method for mounting a sensor is designed and further developed such that the base body and / or the housing is designed with at least one first engagement element and at least one second engagement element for engagement between the base body and the housing, such that when the housing is coupled to the base body, a clamping and / or snap connection between the housing and the base body is realized by means of the at least one first engagement element and a clamping and / or snap connection between the housing, the base body and the sensor cable is realized by means of the at least one second engagement element.

[0027] In accordance with the invention, it has first been recognized that the aforementioned problem is solved in a surprisingly simple manner by cleverly designing the base body and / or the housing. In a further aspect of the invention, the base body and / or the housing have at least one first engagement element and at least one second engagement element for engagement between the base body and the housing. These engagement elements are designed such that, when the housing is coupled to the base body, both a clamping and / or snap-fit ​​connection between the housing and the base body, as well as a clamping and / or snap-fit ​​connection between the housing, the base body, and the sensor cable, can be realized.In this respect, the single coupling process of the housing to the base body accomplishes two functions in one step: firstly, the coupling of the housing to the base body, and secondly – ​​to provide strain relief for the sensor cable – the coupling of the housing to the base body and the sensor cable. This enables quick and easy assembly of the sensor in this single step.

[0028] Consequently, the sensor, the base body and the method according to the invention provide a sensor, a base body and a method according to which simple and quick assembly of a sensor is made possible using structurally simple means.

[0029] To ensure a quick and easy seal for the sensor, coupling the housing to the base body creates a seal between the housing's interior and the external environment. Similar to coupling the housing to the base body and the housing to the base body and the sensor cable, this seal can be easily achieved during the coupling process. This allows not just two, but three functions to be accomplished in a single step by coupling the housing to the base body. For a simple and reliable seal between the housing's interior and the external environment, the base body can have a recess or groove for applying a sealant.The sealant can be inserted into the recess or groove before the sensor is mounted and thus before the housing is coupled to the base body, so that the three functions described above can be easily implemented during the coupling step. In a particularly simple design, the sealant can be an O-ring.

[0030] The housing can be coupled to the base body in various ways, with the simplest method being to slide or screw the housing onto the base body. During this coupling process, the second engagement element can be used to first provide strain relief for the cable, followed by sealing, and finally, the housing can be coupled to the base body using the first engagement element. However, a different sequence is possible depending on the design of the base body and / or the housing.

[0031] In a specific embodiment, the at least one first engagement element can have a locking element associated with or formed on the base body or housing for locking with the housing or the base body to prevent unintentional separation of the base body and the housing in the assembled state. For particularly simple and secure coupling of the housing to the base body, the housing or the base body can accordingly have a recess or groove designed for this purpose. If the locking element is formed on the base body, corrosion can occur due to the locking element springing into a recess or groove formed in the housing.In a further embodiment, such a locking element can be formed both on the housing and on the base body, so that a locking action can take place in a recess or groove in the base body and in the housing.

[0032] To ensure particularly simple and secure mounting of the sensor, the base body may have at least one passage or recess to allow freedom of movement for the at least one first engagement element during the corrosion process. A locking element for the at least one first engagement element, formed on the base body and in the area of ​​the at least one passage or recess, can thus move elastically within a predefinable range in the at least one passage or recess to ensure secure coupling of the housing to the base body.

[0033] In a further specific embodiment, the at least one second engagement element can have a clamping element associated with or formed on the base body to create a clamping connection between the housing, base body, and sensor cable. When the housing is coupled to the base body, for example, by sliding or screwing the housing onto the base body, the clamping element can be pressed against a sensor cable routed through or into the base body to provide strain relief for the sensor cable. This can involve sliding or screwing the housing onto the base body in an axial direction and pressing the at least one second engagement element or clamping element in a radial direction of the base body and / or the housing. As a result, a secure clamping connection between the housing, base body, and sensor cable is achieved.

[0034] Furthermore, with a view to particularly simple and secure mounting of the sensor, the base body can have at least one passage to allow freedom of movement for the at least one second engagement element during the clamping connection. A clamping element of the at least one second engagement element, formed on the base body and in the area of ​​this at least one passage, can thus move elastically within the at least one passage to a predefinable extent in order to ensure a secure coupling of the housing to the base body and the sensor cable.

[0035] The sensor element has a sensitive area for performing a desired measurement. Data detected by the sensitive area is typically processed by electronics, for example, evaluation electronics, in a suitable manner. This processed data can then be forwarded to other components for further use. In one embodiment, the sensor element with its sensitive area can be spatially separated from the electronics or evaluation electronics. Alternatively, the sensor element can have integrated electronics or evaluation electronics. For simple and secure housing of the sensor element, the base body can have at least one recess or opening for receiving the sensor element and / or its electronics, or the sensor element and / or its electronics can be at least partially integrated into the base body.The specific use case can be taken into account here.

[0036] Depending on the application, the sensor, the base body, and / or the housing may or may not have a substantially cylindrical or rectangular cross-section, or be cylindrical or rectangular in shape. Other cross-sectional shapes of the sensor, the base body, and / or the housing, such as polygonal shapes, are also possible.

[0037] For easy and secure installation of the sensor cable, the base body can have a passage for the sensor cable. When the sensor is mounted, the sensor cable can thus extend through the base body into the interior of the housing.

[0038] The base body can be manufactured in various ways. Particularly simple and flexible methods include injection molding, a suitable casting process, or 3D printing. The simplest method can be selected depending on the complexity of the base body's design. The sensor can operate based on different measurement principles. In a specific embodiment, the sensor can be designed as an inductive, capacitive, or infrared temperature sensor. In an inductive sensor design, the base body can accommodate a ferrite core or a magnet. For example, a sensor with a ferrite core in the base body can be used for distance measurement against ferromagnetic objects.

[0039] In exemplary embodiments of the sensor, base body and method according to the invention, it is possible that, for example, in the axial mounting of a housing or housing tube of a wired sensor, the three functions mentioned above can be achieved simultaneously in one step without the need for tools.

[0040] In a further specific embodiment of the sensor or sensor assembly according to the invention, particularly in the case of cylindrical sensors, during the axial assembly of the outer housing or sensor housing, a locking mechanism for fixing the housing or sensor housing with the base body or sensor interior by locking a locking element or a locking lug in a groove of the housing or sensor housing, a clamping mechanism for pressing a clamping element or clamping lugs against a connected sensor cable for strain relief, and a sealing mechanism for sealing the area of ​​the housing or sensor housing and the base body or sensor interior by means of a sealant or an O-ring can be implemented.

[0041] In the context of exemplary embodiments, the basic body can serve as a combination element to realize at least two of the three functions explained at the beginning.

[0042] There are now various ways to advantageously develop and further refine the teaching of the present invention. For this purpose, reference is made, on the one hand, to the dependent claims and, on the other hand, to the following explanation of preferred embodiments of the sensor, the base body, and the method according to the invention with reference to the drawing. In conjunction with the explanation of the preferred embodiments with reference to the drawing, generally preferred embodiments and further developments of the teaching are also explained. The drawing shows

[0043] Fig. 1 in a perspective view, partial, an embodiment of the sensor according to the invention in a starting position for mounting the sensor,

[0044] Fig. 2 shows a side view, partial and cutaway, of the embodiment from Fig. 1 in the starting position.

[0045] Fig. 3 shows a side view, partial and cutaway, of the embodiment from Fig. 1 in a final position of the sensor mounting.

[0046] Fig. 4 in a further side view, rotated 90° about a sensor axis, partially and in section, the embodiment from Fig. 1 in the starting position,

[0047] Fig. 5 shows a further side view as in Fig. 4, partially and in section, the embodiment from Fig. 1 in the final position of the sensor mounting and

[0048] Fig. 6 in a further perspective view, partially, the embodiment from Fig. 1 with an O-ring inserted into a groove of the base body.

[0049] Fig. 1 shows, in a perspective view, a partial embodiment of the sensor according to the invention in a starting position for mounting the sensor. The sensor comprises a base body 1, a sensor element 2, a sensor cable 3 for electrically contacting the sensor element 2, and a housing 4, wherein the housing 4 serves to receive the sensor element 2, a part of the base body 1, and a part of the sensor cable 3.

[0050] For particularly easy mounting of the sensor, the base body 1 has a first engagement element 5 and a second engagement element 6 for engagement between the base body 1 and the housing 4. When the housing 4 is slid onto the base body 1, a snap-fit ​​connection between the housing 4 and the base body 1 is created by means of the first engagement element 5 to prevent unintentional separation of the base body 1 and the housing 4. For this purpose, the housing 4 has a recess 16 as shown in Fig. 3. Furthermore, when the housing 4 is slid onto the base body 1, a clamping connection between the housing 4, the base body 1, and the sensor cable 3 is created by means of the second engagement element 6. In this case, the second engagement element 6 is pressed against the sensor cable 3 by the housing 4.

[0051] Furthermore, when the housing 4 is coupled to the base body 1, a seal is created between the interior of the housing 4 and the external environment, for example to prevent the ingress of dust and / or liquids into the interior of the housing 4. For this purpose, the base body 1 has a groove 7 for receiving a sealing element, which is designed as an O-ring 8. When the housing 4 is slid onto the base body 1, the O-ring is pressed against the base body 1 and inwards in all radial directions with respect to a longitudinal axis of the base body 1 extending in a longitudinal direction.

[0052] Specifically, the first engagement element 5 is a locking element 9 formed on the base body 1 for locking with the housing 4. The base body 1 has a passage 10 for each locking element 9 to allow freedom of movement for the first engagement element 5 designed as a locking element 9.

[0053] Furthermore, the second engagement element 6 has a clamping element 11 formed on the base body 1 for creating a clamping connection between the housing 4, the base body 1, and the sensor cable 3. The base body 1 has a passage 12 for each clamping element 11 to allow freedom of movement for the second engagement element 6, which is designed as a clamping element 11.

[0054] On the clamping elements 11, preferably wing-like projections 11a or protrusions are formed on opposite sides of the clamping element 11, which are preferably formed integrally with the clamping element 11. These projections 11a or protrusions have a very important function. If, due to excessive mechanical stress in the assembled or connected state, the clamping element 11 were to break off in the area 11b where it connects to the base body 1, the clamping element 11 cannot tilt in that state, as would be the case without the projections 11a or protrusions. Tilting would mean that the sensor cable clamping would no longer be present at all or would be insufficient.With the embodiment described here, however, the projections 11a or protrusions would, after a break, for example in area 11b, rest on lateral support surfaces 11c of the base body, so that the clamping element 11 can no longer "tip over" laterally and thus lose its clamping effect. The clamping element 11 essentially wedges itself in place should it break. This can certainly occur, albeit rarely, especially after prolonged use of the sensor, since, for example, plastic as the material of the housing body 1 with the clamping elements 11 only ever has a limited strength, particularly over time, and is not infinitely flexible and / or bendable to a great extent. Therefore, the implementation of such projections 11a or protrusions provides a particularly reliable sensor for long-term use.

[0055] In the rare event that a break should actually occur, the design of the base body 1 and thus a distance 11d - see Fig. 5 - can additionally be chosen so that there is no or only too little play in the strain relief, as otherwise the sensor cable 3 could move back and forth in the axial direction.

[0056] In the embodiment shown here, the sensor, and more specifically the base body 1 and the housing 4, have a substantially cylindrical cross-section, or these components are substantially cylindrical in shape. The base body 1 has a passage 13 for the sensor cable 3 to pass into an interior region of the base body 1 and thus also into an interior region of the housing 4, which is pushed onto or coupled to the base body 1.

[0057] Furthermore, Adem 14 and 15 of the sensor cable 3 are shown in Fig. 1.

[0058] In the embodiment shown here, a locking, strain relief, and sealing mechanism are implemented. Key components of the embodiment are shown in Fig. 1:

[0059] • Locking lug or locking element 9 for fixing the sensor internals to the sensor housing or housing 4.

[0060] • O-ring 8 for sealing against external influences.

[0061] • Clamping nose or clamping element 11 for strain relief of the connected sensor cable 3.

[0062] The embodiment shown here has two locking elements 9 or locking lugs, the second locking element 9 or locking lug being located in an opposite position, offset by 180° relative to the first locking element 9 or locking lug. The purpose of the locking elements 9 or locking lugs is to secure the sensor housing or housing 4, in this case a housing tube. It is advantageous if the housing 4 or housing tube has a cylindrical cross-section. However, it can also have a rectangular cross-section, for example. For this purpose, the locking element 9 or locking lug is designed such that one part of the locking element 9 or locking lug has spring-like properties – configured as a type of spring element – ​​and serves to secure the housing 4. Another part of the locking element 9 or locking lug is firmly connected to the base body 1 or sensor internals and secures them.By axially sliding the housing 4 or housing tube, the spring-loaded part of the locking element 9 or the locking lug is pressed towards the sensor's central axis. The design must be such that sufficient space is available for this movement. The housing 4 or housing tube has a recess 16 or groove, for example as an undercut, at a specific position. When the housing 4 or housing tube reaches its final position during assembly, the design is such that the spring-loaded part of the locking element 9 or the locking lug, due to its restoring capacity, springs into the recess 16 or groove and consequently fixes the housing 4 or housing tube to the base body 1 or sensor internals, because the other part of the locking element 9 or the locking lug is firmly connected to the base body 1 or sensor internals.This secures the base body 1 or the sensor's internal components (sensor element 2 and / or electronic circuit board), i.e., holds it in position so that displacement, e.g., due to shock / vibration, is prevented. See Figures 2 and 3. The number of locking elements 9 or locking lugs is not fixed. A lower or higher number of locking elements 9 or locking lugs is possible.

[0063] In Figures 2 to 5 described below, the same reference numerals as in Figure 1 indicate the same components, so reference may be made to the figure description for Figure 1 to avoid repetition.

[0064] Fig. 2 shows in a side view, partial and cutaway, the embodiment from Fig. 1 in the starting position for the assembly of the housing 4 or housing tube, showing the locking mechanism described above.

[0065] Fig. 3 shows a partial and sectional side view of the embodiment from Fig. 1 in a final mounting position of the sensor, with the housing 4 or housing tube fully slid onto the base body 1. The locking elements 9 or locking lugs are engaged in recesses 16 of the housing 4 or housing tube.

[0066] In addition to the locking elements 9 or locking lugs, the clamping elements 11 or clamping lugs are also shown in Fig. 1, with the locking elements 9 or locking lugs being arranged offset by 90° relative to the clamping elements 11 or clamping lugs. As with the locking elements 9 or locking lugs, the clamping elements 11 or clamping lugs are also arranged in opposite positions to each other. Fig. 4 shows a further side view, rotated by 90° about a sensor axis, partially and in section, of the embodiment from Fig. 1 in the starting position of the assembly of the housing 4 or housing tube, showing the clamping mechanism described above.

[0067] Fig. 5 shows, in a further side view as in Fig. 4, partially and in section, the embodiment from Fig. 1 in the final position of the sensor assembly, with the housing 4 or housing tube completely pushed onto the base body 1. The clamping elements 11 or clamping lugs are pressed into the sensor cable 3 by means of the housing 4 or housing tube.

[0068] The clamping elements 11 or clamping lugs also exhibit spring properties. These elements are located near the connected sensor cable 3. When the housing 4 or housing tube is axially slid over the sensor along inclined areas of the clamping elements 11 or clamping lugs, the clamping elements 11 or clamping lugs are pressed towards the sensor's central axis. The sensor cable 3 located there exerts a predetermined resistance against the clamping elements 11 or clamping lugs, or a resistance that can be determined by selecting the appropriate sensor cable 3. This means that after the housing 4 or housing tube is installed, the clamping elements 11 or clamping lugs exert permanent pressure on the sensor cable 3.

[0069] Sensor cables 3 typically consist of individual wires or conductors 14 and 15 and their insulation, as well as an enclosing cable sheath. This cable sheath is usually made of plastics such as PVC, polyurethane, or polyethylene (this list is not exhaustive). The cable sheath has a slight degree of deformation. The clamping elements 11 or clamping lugs press slightly into the cable sheath and thus secure the sensor cable 3. This provides a predefined cable strain relief. Compare Figures 4 and 5. The number of clamping elements 11 or clamping lugs is not fixed at two. A smaller or larger number of clamping elements 11 or clamping lugs is possible. Figure 6 shows, in a further perspective view, a partial illustration of the embodiment from Figure 1 with an O-ring 8 inserted into a groove 7 of the base body 1. The position of the O-ring 8 is further clarified.This is located in a groove 7 of the base body 1 or sensor internals. The axial mounting of the housing 4 or housing tube presses the O-ring 8 into place, thereby creating a sealing compression. The sensor internals are thus sealed against the external environment. See also Fig. 5.

[0070] Due to the constructive design according to the invention, it is possible in exemplary embodiments that during the axial assembly of the housing 4 or sensor housing, in the above case a housing tube, i.e. in one step, up to or at least three functions are realized, namely (i) that the housing 4 or sensor housing is fixed and thus fixed to the base body 1 or sensor interior, (ii) that the sensor cable 3 is clamped and thus relieved of tensile forces, and (iii) that a seal is created between the housing 4 or sensor housing and the housing body 1 or sensor interior by pressing the O-ring 8.

[0071] It is particularly advantageous if the three functions are implemented in a single component as a combined element, which can be provided by the base body 1. This means that the (preferably multiple) locking elements 9 or locking lugs, the (preferably multiple) clamping elements 11 or clamping lugs, and the groove 7 for receiving the O-ring 8 are manufactured from a single part. This combined element can additionally have a receptacle for the sensor element 2. Another receptacle can accommodate electronics or a circuit board. Furthermore, the combined element has an inlet or feedthrough 13 for the sensor cable 3. The combined element is particularly advantageously manufactured from plastic using injection molding, since this allows all functions to be implemented in a single manufacturing process, provided the design is appropriate.The combination element could also be manufactured using other methods, such as milling. It can also be constructed from several functional units, so that, for example, the function of the locking elements 9 or locking lugs and the clamping elements 11 or clamping lugs are each realized in a separate element, and these elements are then joined or plugged together.

[0072] Regarding further advantageous embodiments of the sensor according to the invention, the base body according to the invention and the method according to the invention, reference is made to the general part of the description and to the attached claims to avoid repetition.

[0073] Finally, it should be expressly pointed out that the exemplary embodiments described above serve only to illustrate the claimed teaching, but do not limit it to these exemplary embodiments.

[0074] Reference sign list

[0075] 1 Basic body

[0076] 2 Sensor element

[0077] 3 sensor cables

[0078] 4 cases

[0079] 5 first intervention element

[0080] 6 second intervention element

[0081] 7 Nut

[0082] 8 O-ring

[0083] 9 locking element

[0084] 10 rounds

[0085] 11 Clamping element 1a Approach 1b Area 1c Contact surface 1d Distance

[0086] 12 rounds

[0087] 13th round

[0088] 14 wires

[0089] 15 wires

[0090] 16 Exclusion

Claims

A n s p r ü c h e 1. Sensor comprising a base body (1), a sensor element (2), a sensor cable (3) for electrically contacting the sensor element (2), and a housing (4) for receiving at least a part of the sensor element (2), at least a part of the base body (1), and at least a part of the sensor cable (3), characterized in that the base body (1) and / or the housing (4) have at least one first engagement element (5) and at least one second engagement element (6) for engagement between the base body (1) and the housing (4), such that when the housing (4) is coupled to the base body (1), a clamping and / or snap connection between the housing (4) and the base body (1) can be realized by means of the at least one first engagement element (5), and a clamping and / or snap connection between the housing (4), the base body (1), and the sensor cable (3) can be realized by means of the at least one second engagement element (6).

2. Sensor according to claim 1, characterized in that by coupling the housing (4) with the base body (1) a seal of an inner area of ​​the housing (4) against an external environment is realized.

3. Sensor according to claim 2, characterized in that the base body (1 ) has a recess or groove (7) for receiving a sealing means, wherein the sealing means may be formed by an O-ring (8).

4. Sensor according to one of claims 1 to 3, characterized in that the coupling of the housing (4) with the base body (1 ) can be achieved by sliding or screwing the housing (4) onto the base body (1 ).

5. Sensor according to one of claims 1 to 4, characterized in that the at least one first engagement element (5) is a locking element (9) associated with or formed on the base body (1) or on the housing (4) for locking with the housing (4) or the base body (4). body (1) having a housing (4) or base body (1) which may have a recess (16) or groove designed for this purpose.

6. Sensor according to claim 5, characterized in that the base body (1 ) has at least one passage (10) or at least one recess to enable freedom of movement for the at least one first engagement element (5) during rusting.

7. Sensor according to one of claims 1 to 6, characterized in that the at least one second engagement element (6) has a clamping element (11) assigned to or formed on the base body (1) for realizing a clamping connection between housing (4), base body (1) and sensor cable (3).

8. Sensor according to claim 7, characterized in that the base body (1 ) has at least one passage (12) to enable freedom of movement for the at least one second engagement element (6) during the realization of the clamping connection.

9. Sensor according to one of claims 1 to 8, characterized in that the base body (1 ) has at least one receptacle or recess for receiving the sensor element (2) and / or its electronics, or that the sensor element (2) and / or its electronics are at least partially integrated into the base body (1 ).

10. Sensor according to one of claims 1 to 9, characterized in that the sensor, the base body (1) and / or the housing (4) have a substantially cylindrical or rectangular cross-section or are cylindrical or rectangular in shape.

11. Sensor according to one of claims 1 to 10, characterized in that the base body (1 ) has a passage (13) for the sensor cable (3).

12. Sensor according to one of claims 1 to 11, characterized in that the base body (1) is manufactured by injection molding.

13. Sensor according to one of claims 1 to 12, characterized in that the sensor is designed as an inductive, capacitive or infrared temperature measuring sensor.

14. Base body (1 ) for a sensor according to one of claims 1 to 13, wherein the base body (1) has at least one first engagement element (5) and at least one second engagement element (6) for engagement between the base body (1 ) and a housing (4), such that when the housing (4) is coupled to the base body (1 ), a clamping and / or snap connection between the housing (4) and the base body (1 ) can be realized by means of the at least one first engagement element (5) and a clamping and / or snap connection between the housing (4), the base body (1) and a sensor cable (3) can be realized by means of the at least one second engagement element (6), wherein the base body (1 ) can have a recess or groove (7) for receiving a sealing means.

15. Method for mounting a sensor according to any one of claims 1 to 13, wherein the sensor comprises a base body (1), a sensor element (2), a sensor cable (3) for electrically contacting the sensor element (2), and a housing (4) for receiving at least a part of the sensor element (2), at least a part of the base body (1), and at least a part of the sensor cable (3), characterized in that the base body (1) and / or the housing (4) are designed with at least one first engagement element (5) and at least one second engagement element (6) for engagement between the base body (1) and the housing (4), such that when the housing (4) is coupled to the base body (1), a clamping and / or snap connection is formed between the housing (4) and the base body (1) by means of the at least one first engagement element (5), and a clamping and / or snap connection is formed between the housing (4),the base body (1) and the sensor cable (3) is realized by means of at least one second engagement element (6).

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