Automation field device

An automation field device, including:

• a housing for accommodating electronics of the field device, wherein the housing has a substantially cup-shaped housing cover which is provided in a cup surface with a recess for a viewing window;
• a viewing window insert made of a transparent material resting on an inner side of the housing cover at the edge of the recess;
• a resilient molded plastic part for receiving and holding the viewing window insert, which is pressed into the free space between the inside of the housing cover and the edge of the viewing window insert in such a way that the molded plastic part, on the one hand, substantially fills the free space and, on the other hand, also holds the viewing window insert permanently in the housing cover without any further fastening.

The field device according to claim 5, wherein the housing cover comprises an outwardly and/or inwardly projecting bulge on the inner side, in the region where the molded plastic part is pressed in or an edge of the viewing window insert.

The automation field device according to claim 5, wherein the viewing window insert or housing cover is designed in such a way that the pressed-in resilient molded plastic part has a widening at at least one axial end.

The automation field device according to claim 5, obtainable in that the resilient molded plastic part is pressed into the free space in such a way that the initially non-compressed molded plastic part with a lateral extension of X′ after pressing in has a lateral extension X less than 0.85* X.

The automation field device according to claim 4, obtainable in that the resilient molded plastic part is pressed into the free space in such a way that the initially non-compressed molded plastic part with an axial extension of Y′ after pressing in has an axial extension Y greater than 1.25*Y.