Temperature sensor

A temperature sensor (1) for sensing a temperature of a medium, comprising:

• a sensing arm (7) having at least one arm leg (9) and a free arm end (12), said arm leg (9) having an outer circumferential surface;
• said sensing arm (7) having a casing tube (15) made of electrically conducting material, said casing tube (15) providing first and second tube ends (20, 40) and a tube interior surface (32), said outer circumferential surface defining an external sensor width extension;
• an electrical sensing resistor wire (24) located in and along said casing tube (15), said sensing resistor wire (24) being a resistor coil (26) provided by a resistor wire (25), said resistor wire (25) providing first and second connecting ends (29, 41) for electrical connection of said sensing resistor wire (24);
• an insulating material (30) embedding and insulating said sensing resistor wire (24) with respect to said casing tube (15), said first connecting end (29) being provided within said insulating material (30), said insulating material (30) connecting to said tube interior surface (32);
• at least one terminal pin (21) having inner and outer pin ends (22, 23), said inner pin end (22) being electrically conductively connected to said first connecting end (29) within said insulating material (30);
• first and second closures (16, 44) sealingly closing said first and second tube ends (20, 40), said first closure (16) being sealingly traversed by said terminal pin (21);
• a flange (8) for mounting said temperature sensor (1) to a wall, said flange (8) having flange faces including an inside flange face and an outside flange face, said inside flange face and said outside flange face being remote from each other, thereby defining flange sides including a flange inside and a flange outside respectively, said temperature sensor (1) having specified sections including a temperature detecting section from said flange inside to said free arm end (12, 40) and a non-detecting section from said flange outside and extending in a direction opposite said temperature detecting section, said detecting section (13) being provided to be exposed to the medium, said sensing arm (7) freely projecting past said flange inside,
• said outer pin end (23) and said first tube end (20) being provided on said flange outside, said flange (8) being traversed by at least one boro (11) closely adapted to said arm leg (9) and sealingly traversed by said arm leg (9),
• said outer circumferential surface being fixed to said flange (8),
• said first and second connecting ends (29) being provided commonly on a single one of said specified sections (13),
• between said flange inside and said arm end (12), said casing tube (15) defining an overall tube length extension (13) provided to be in contact with the medium, said resistor coil (26) defining an overall coil length extension, wherein said coil length extension extends substantially entirely over said tube length extension (13);
• at least in said detecting section (13), said resistor coil (26) being sealingly encapsulated to provide gas-tight and liquid-tight sealing of said resistor coil, said first closure (16) being sealingly traversed by said terminal pin (21) to provide a gas-tight and liquid-tight seal.