Abstract: A housing for sensitive apparatus comprises an outer housing having an opening on at least one side with a frame extending around the opening which has a sealing ring groove and including an interior apparatus carrying frame member disposed within the housing in spaced relationship to the wall and advantageously supported for example on shock absorbing elements. The interior apparatus frame member has a frame disposed around an open side which faces the open side of the housing and this frame also has a sealing ring groove defined around its periphery. The sealing member extends between the housing frame and the interior apparatus carrying frame member frame and it includes a flexible bellows portion extending between the two frame members and ring portions which are disposed in the respective ring grooves of the associated housing frame and apparatus carrying frame member.