The assembly comprises a pressure sensor element for measuring pressure and a wire having said pressure sensor element at its distal portion, and adapted to be inserted into the body in order to position the sensor element within the body. In addition is arranged a sensor signal adapting circuitry, being an integrated part of said assembly, wherein the pressure sensor signal is applied to the adapting circuitry to automatically generate an output pressure signal in a standardized format retrievable by an external physiology monitor. The assembly further comprises an external pressure sensor arranged at the assembly to measure the pressure outside the patients body, the external pressure values being applied to a pressure compensation means in the assembly, wherein the output pressure signal is compensated prior to the output pressure signal being applied to the external physiology monitor.