Patent Number: 
Section: claims

1. A device for measuring a fill level in a pressurized fluid container, the device comprising:a pressure pipe guided out of the fluid container;a thermocouple constructed as a mineral-insulated cable and disposed at least partly in said pressure pipe;a pipe sleeve soldered in a partial section to said thermocouple and surrounding said thermocouple;a sealing device being effective as a pressure barrier, said sealing device having a connection element with a central part encompassing said pipe sleeve and being supported on said pipe sleeve and a connection piece disposed at a first side, protruding laterally and encompassing said pressure pipe;said connection element having a connection piece on a second side remote from said connection piece on the first side, said connection piece on the second side encompassing said pipe sleeve and abutting against said pipe sleeve in a contact region;said pipe sleeve being spaced apart from said thermocouple in said contact region by an annular gap;a screw connection connecting said connection piece on the first side to said pressure pipe; andsaid pressure pipe being spaced apart from said pipe sleeve and from said thermocouple by an annular gap. 2. The device according to claim 1, wherein the fluid container is a reactor pressure container of a nuclear facility. 3. The device according to claim 1, wherein said connection piece on the first side has a threaded piece, and said screw connection has a pipe nut screwed onto said threaded piece and simultaneously pressing a sealing element against an outer periphery of said pressure pipe. 4. The device according to claim 1, which further comprises a screw connection connecting said connection piece on the second side to said pipe sleeve. 5. The device according to claim 4, wherein said connection piece on the second side has a threaded piece, and a pipe nut is screwed onto said threaded piece and simultaneously presses a sealing element against an outer periphery of said pipe sleeve.