A housing with an open receiving chamber which has a circumferential edge in the form of a creepage barrier at an open upper face is disclosed. The receiving chamber is filled with a casting compound, and the hardened casting compound forms a concave surface relative to the circumferential edge at the open upper face. A sensor is also disclosed that includes such a housing. In addition, a method for casting an open receiving chamber of such a housing is disclosed. The open receiving chamber has an opening at one end leading to an enclosed interior adjoining the open receiving chamber. The enclosed interior is filled with the casting compound, and the open upper face of the receiving chamber has a varying height where the upper face transitions into the enclosed interior. The circumferential edge has an outwardly descending inclination and a continuous curvature formed by tangential transitions in order to overcome the height difference, and the circumferential edge allows the receiving chamber to be temporarily overfilled, thereby forming a stable convex casting compound surface, during the casting process.