Abstract: In an arrangement to optically illuminate and/or to perform measurements in a sample stream through a flange which is arranged in the sample stream and closes off a hollow space against the sample stream, there is a continuous loss of material due to abrasion of wall particles, and the flange therefore has to be exchanged on a regular basis. The invention has the purpose of reducing the wear on the flange. To meet this objective, a part of the wall extending along a closed loop around the hollow space (3) consists of an elastomeric body (2.3). This concept makes it possible for the flange or at least for a part of the flange to elastically back away under a concentrated load. Thus, the rate of abrasion of the wall by the sample stream is reduced, because a large part of the incoming energy is converted to heat in the elastomeric body.

Abstract: A method produces three-dimensionally formed armoring components for vehicle bodies. The armoring components are produced in a repeatedly accurate manner with minimal post-machining requirements and with lower dimensional tolerances than comparable weldments. Sheet metal molded parts are produced from hardenable steel by a thermal pre-treatment, the heating speed and temperature being selected at least until the austenitic or partially austenitic state is achieved depending on the alloy content, and formed armoring components are produced from press-forming and optionally subsequently subjected to quench or thermal treatment.