Ultrasonic web edge sensor bks series

The bks edge sensor facilitates the contact-free web edge scanning of foils, paper and other soundimpermeable materials. Highlights 0.025 mm resolution 0.1 mm relative accuracy 4 ms response time 8 mm working range Basics Contact-free detection of the path edge 3 LEDs and 1 button on the top of the housing Parameterisable with LinkControl Robust metal housing for harsh usage conditions Description The bks ultrasonic edge sensor is a fork sensor for scanning the edges of sound-impermeable materials such as foil or paper. This is why the bks is ideally suited for the web control of highly transparent foils, light-sensitive materials, materials with greatly varying transparency and paper subject to high paper dust loads. The functional principle The fork’s lower leg is equipped with an ultrasonic transmitter which cyclically emits short sound impulses, which are detected by the ultrasonic receiver arranged in the upper fork leg. Material passing through the fork covers this sound path and thus attenuates the receiving signal depending on the coverage, which is evaluated by the internal electronics. An analogue signal is output in dependence of the coverage degree.