Sensor arrangement

A sensor arrangement for determining a measurand of a measuring medium, comprising:

• a first sensor with a first sensing element configured to record values of a first measurand of a calibration medium;
• and
• a housing having a housing wall defining a housing interior, wherein the first sensing element is disposed within the housing interior and the calibration medium having a predetermined value of the first measurand, is contained within the housing interior, and wherein the housing wall further defines at least an inlet;
• a membrane fluidly separating the calibration medium and an exterior of the housing at or near the inlet, wherein the membrane is configured to be irreversibly removable from the sensor arrangement as to establish fluid communication between the sensor arrangement and a process vessel via the inlet;
• wherein the sensor arrangement is configured to be mechanically linked to the process vessel without establishing fluid communication between the sensor arrangement and the process vessel;
• wherein a value of the first measurand of the calibration medium is recorded using the first sensing element before establishing fluid communication between the sensor arrangement and the process vessel;
• wherein a calibration, and/or verification, and/or an adjustment of the first sensor using the recorded value of the first measurand is performed prior to establishing fluid communication between the sensor arrangement and the process vessel.