A process for producing a sensor device

A process for producing a sensor device comprising the steps of: Disposing a sensor element (3) in a recess (2) of a housing (1), wherein the sensor element (3) for detecting an environmental condition outside the recess (2) is used; tight sealing of an opening of the recess (2) having a plate member (9) to prevent the interior and the exterior of the recess (2) communicating with each other; Performing a treatment of the housing (1) together with the plate member (9) which foreign matter prevents during the treatment to penetrate into the interior of the recess (2); and Forming a through-hole (11) in said plate member (9) to establish a connection between the interior and exterior of the recess (2), wherein the treatment by washing of the housing using a solution and / or applying a protective agent against moisture to a surface of the housing and allowing to dry, the solution and / or the protective agent from moisture prior to the formation of ...