Abstract: The present disclosure relates to a method for manufacturing a sensor cap with at least one main body and a membrane for an optochemical or electrochemical sensor for determining and/or monitoring the concentration of an analyte in a measuring medium, a corresponding sensor cap, and a corresponding sensor. In one aspect of the present disclosure, a permeable membrane is provided with a surface for contacting the measuring medium, as well as a main body with at least one sector for connecting to the membrane. At least part of the membrane and main body are welded, wherein the membrane is at least partially applied to the at least one sector of the main body and a connection between the main body and membrane is sealed against the measuring medium.