Abstract: A method for monitoring a picking or packaging process of at least one article. Using a plurality of cameras, images are recorded of at least one moving article. Labels in the images are read. The read labels are compared with specifications from a picking list, and a sort of the article is identified on the basis of the comparison. If the sort of the article does not agree with specifications from the picking list, a warning is issued. In addition, a camera system having a plurality of cameras is provided. These cameras are set up to record at least the images and to read labels in the images.

Abstract: The invention relates to an optical sensor device for measuring at least two analytes. The sensor device contains at least one first dye and a second dye, wherein the dyes have an optical behaviour that depends on the respective analytes. The at least one first dye is contained in a membrane. The membrane limits a cavity. The cavity contains a buffer mixed with the second dye. A reservoir for the buffer and second dye is provided, the reservoir being in diffusive contact with the cavity. The optical behaviour of the dyes can be stimulated with excitation light, and the resulting optical behaviour can for example be detected by photodetectors making use of associated dichroic mirrors. Components of the optical sensor device may be arranged in a common housing.