A sensor, especially a conductive conductivity sensor, to determine a measurand, especially the conductivity, of a medium, including: a process interface shaped as a hollow cylinder and made of a metal, with the process interface having at least two internal segments; a mainly cylinder-shaped sensor element that is mainly made of a ceramic, with a first section to introduce the sensor element into the process interface and a second section with which the sensor element protrudes from the process interface. The first section of the sensor element has at least two segments, wherein the respective first segment of the process interface and the sensor element are designed as a press fit, and the respective second segment of the process interface and the sensor element create a gap and a method to manufacture such a sensor.