Contact temperature sensor with NTC sensing element to be used in combination with ekinex® KNX devices equipped with an analog input (or configurable as [AI]) to measure the temperature. The sensing element is inserted into a brass protective sleeve and is suitable for detecting the temperature of the conveying fluid without the need of insertion in the hydraulic circuit; for example by fixing in contact with a pipe or a heat exchange coil of a fancoil unit. The electrical connection with the ekinex® KNX device is realized by the two-wire cable (length 1.5 m).