The present invention relates to a universal fitting for in-line fluid measurement in a process application. The fitting includes an inlet and outlet port for in-line coupling to the process application. Also, a fluid flow passage provides fluid communication between the ports. At least one sensor housing extends outwardly away from a wall of the fluid passage. Also, the housing is sized to receive a sensor assembly which assembly measures at least one characteristic of the fluid. A base of the housing is integrally formed with the wall and includes a sensor seat for receiving a portion of the sensor assembly. Further, at least one probe aperture is provided for receiving a probe portion of the sensor assembly. The probe aperture is disposed in the wall of the fluid passage and extends from the fluid passage through the sensor seat into the housing.