On a conveyor section, small objects or containers being conveyed in sequence have to be detected with positional accuracy and a short response time to trigger their labeling. This is where the di-soric fork light barriers come into play. They detect the front edge of the containers and control the labeling through their switching signal. Here, our fork light barriers feature very good reproducibility of 0.02 mm and fast switching behavior at up to 8000 Hz. Consequently, the throughput speed can be maximized while the precision and reproducibility are maintained.