Growing demands for reliability, safety and quality of the production are dealt with by including complex monitoring systems in the lines. Individual functions of the bottling line and the precision of the dosing are measured using control scales. The presence of caps on the containers as well as the quality of the sealing, the presence and correct application of the labels are monitored. Apart from this, metal detectors make sure that no metallic parts are present within the containers. Defective products or products containing alien particles are sorted out. The system indicates why the article has been sorted out.