The invention relates to a sensor (23) adapted for a sensor and guide wire assembly for intravascular measurements in a living body, wherein the sensor (23) comprises a pressure sensitive part (24) and an electronic part (25), said pressure sensitive part (24) comprising a first chip (26) provided with at least one pressure sensitive device (27) and at least one piezoelectric element (35), and said electronic part (25) comprising a second chip (28) provided with at least one electric circuit, and wherein said pressure sensitive part (24) and electronic part (25) are spatially separated from each other and are electrically connected with at least one electrical lead (29).