The present disclosure includes an inline sensor arrangement and a method for bringing an inline sensor arrangement into service, where the inline sensor arrangement includes a sensor embodied to produce and to output a measurement signal correlated with the measured variable, and where the sensor has at least one sterile sensor element for contact with the measured medium and at least one housing, which surrounds the sensor element and encloses the sensor element in a chamber sealed from an environment of the housing. The method includes performing a heat sterilization of at least one part of the inline sensor arrangement comprising a housing exterior of the housing, opening the housing after terminating the heat sterilization, and bringing the sensor element into contact with the measured medium.
