Sensor

Abstract

Sensor (100), in particular radar sensor, with a, in particular cylindrical, measuring probe (110) and an adapter (10) for arranging the measuring probe (110) at an opening (212) in a wall (210) of a container (200), wherein the adapter (10) has a body (20) with a continuous central cavity (22), wherein the measuring probe (110) furthermore passes through the cavity (22) and has a measuring end (112) which, in the arranged state of the sensor (100), projects into an interior (220) of the container (200), wherein the adapter (10) furthermore has a sealing device (12), wherein the sealing device (12) is arranged for sealing an intermediate space (26) between the measuring probe (110) and an inner wall (24) of the cavity (22), and the measuring probe (110) is circumferentially characterized in that the sealing device (12) comprises a vapor barrier (40),wherein the vapor barrier (40) completely surrounds the measuring probe (110) and extends radially from the measuring probe (110) to the inner wall (24), and wherein the vapor barrier (40) is electrically insulating at least in the areas of the vapor barrier (40) adjacent to the measuring probe (110).

Claims

[1] Sensor (100), in particular radar sensor, with a, in particular cylindrical, measuring probe (110) and an adapter (10) for arranging the measuring probe (110) at an opening (212) in a wall (210) of a container (200), wherein the adapter (10) has a body (20) with a continuous central cavity (22), wherein furthermore the measuring probe (110) passes through the cavity (22) and has a measuring end (112) which, in the arranged state of the sensor (100), projects into an interior (220) of the container (200), wherein the adapter (10) further has a sealing device (12), wherein the sealing device (12) is arranged for sealing an intermediate space (26) between the measuring probe (110) and an inner wall (24) of the cavity (22), and in this case the measuring probe (110) encompasses all around, characterized byin that the sealing device (12) comprises a vapor barrier (40), wherein the vapor barrier (40) completely surrounds the measuring probe (110) and extends radially from the measuring probe (110) to the inner wall (24), and wherein the vapor barrier (40) is designed to be electrically insulating at least in the regions of the vapor barrier (40) which are adjacent to the measuring probe (110). [2] Sensor (100) according to claim 1, characterized by that the vapor barrier (40) consists entirely of an electrically insulating material, in particular that the vapor barrier (40) consists of ceramic and / or glass. [3] Sensor (100) according to one of the preceding claims, characterized byin that the vapor barrier (40) has a circumferential T-section (42) with a T-like cross-section with an upper transverse section (44) and a lower longitudinal section (46), wherein the transverse section (44) extends radially from the measuring probe (110) to the inner wall (24) and the longitudinal section (46) extends from the transverse section (44) in the direction of the measuring end (112), and wherein an O-ring (90) for sealing is inserted between the measuring probe (110) and a radial inner side (48) of the longitudinal section (46) and / or an O-ring (90) for sealing is inserted between a radial outer side (50) of the longitudinal section (46) and the inner wall (24) of the cavity (22). [4] Sensor (100) according to one of the preceding claims, characterized byin that the sealing device (12) comprises a cover (60), wherein the cover (60) forms a lower end (14) of the sealing device (12) facing the measuring end (112), wherein the cover (60) has a passage (62) for the measuring probe (110) and otherwise completely closes off the cavity (22) in the direction of the measuring end (112). [5] Sensor (100) according to claim 4, characterized by that the body (20) has a circumferential projection (28) at an end of the cavity (22) facing the measuring end (112), wherein the end cover (60) bears positively against this projection (28). [6] Sensor (100) according to claim 4 or 5, characterized by that the end cover (60) is designed as part of the vapor barrier (40). [7] Sensor (100) according to one of the preceding claims, characterized bythat the sealing device (12) has at least one securing element (70) which forms an upper end (16) of the sealing device (12) facing away from the measuring end (112), wherein the at least one securing element (70) is secured in the body (20) against axial movement along the measuring probe (110). [8] Sensor (100) according to claim 7, characterized by that the securing element (70) is designed as a securing ring (72) which engages in a preferably circumferential securing groove (74) on the inner wall (24) of the cavity (22). [9] Sensor (100) according to claim 7, characterized by that the securing element (70) has a thread which engages in a counter thread on the inner wall (24) of the cavity (22) for axially securing the securing element (70). [10] Sensor (100) according to one of claims 7 to 9, characterized bythat a spacer element (80), preferably running circumferentially relative to the measuring probe (110), is arranged between the securing element (70) and the vapor barrier (40). [11] Sensor (100) according to claim 10, characterized by that the spacer element (80) is elastic. [12] Sensor (100) according to claim 10 or 11, characterized by that an elastic bracing element (82) is arranged between the securing element (70) and the spacer element (80) and / or between the spacer element (80) and the vapor barrier (40), wherein the bracing element (82) is preferably designed as an O-ring (90). [13] Sensor (100) according to one of claims 10 to 12 characterized by that the spacer element (80) is formed as part of the vapor barrier (40). [14] Sensor (100) according to one of the preceding claims, characterized bythat the cavity (22) in the adapter (10) extends as a free volume (30) beyond an end of the sealing device facing away from the measuring end (112), wherein at least one vent opening (32) is provided in the body (20) which connects this free volume (30) with the environment outside the container (200) in the arranged state of the sensor (100). [15] Sensor (100) according to one of the preceding claims, characterized by that the adapter (10) has a further sealing element (18) for sealing the sensor (100) arranged on the container (200), wherein the sealing element (18) is shaped and arranged on an outer side (50) of the body (20) in such a way that, in the arranged state of the sensor (100), it is arranged between the body (20) and the container (200) and circumferentially around the opening (212) in the wall (210) of the container (200).

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