Abstract: A device and a system for measuring temperature in an inaccessible and/or movable mechanical part. The device comprises a temperature-sensitive clement which can be installed inside the movable part and which is designed to emit a signal containing information on the temperature of said clement, in such a way that this signal can be received by a control unit. The temperature-sensitive clement is a SAW chip which is arranged at the lower end of a hole in the mechanical part whose temperature is to be measured and it is connected to a first antenna provided outside said hole in said mechanical part.