Apparatus and process for determining the properties of a material web

The present application claims priority under 35 U.S.C. § 119 of German Patent Application No. 199 13 929.6, filed on Mar. 26, 1999, the disclosure of which is expressly incorporated by reference herein in its entirety. Apparatus and process for determining the properties of a material web. The apparatus includes at least one radiation source, and at least one detection device adapted to detect radiation emitted from the at least one radiation source that at least one of penetrates and is reflected by the material web. The detection device can include at least one detection area unevenly divided into a plurality of individual sensors. Further, the material web can be a paper web. The invention relates to a device and a process for determining the properties of a material web, particularly a paper web, having at least one radiation source and at least one detection device for radiation that is emitted by the radiation source and that penetrates and/or is reflected by the material web, said detection device having at least one detection area unevenly divided into a large number of individual sensors.