Wenglor ultrasonic fork sensors

Click2Contact

As packaging errors are perceived as a product defect, perfect product labelling plays an important role in packaging processes. The ultrasonic fork sensors from Wenglor are designed to reliably monitor the presence of dark, transparent or printed labels on role holders, before they’re applied to packages by label dispensers. This assures the highest possible quality standards and, at the same time, reduces costs resulting from scrap due to incorrectly labelled products.

Whether paper or plastic, printed or transparent, ultrasonic fork sensors detect labels on any base material regardless of colour, degree of transparency and surface characteristics. They are also designed to reliably detect transparent labels on transparent base materials at high process speeds. This is due to varying ultrasound attenuation resulting from different material thicknesses, because the label on the base material attenuates the ultrasound to a greater extent than the bare base material between two labels. A small gap of 2 mm is enough to detect labels at a switching frequency of up to 400 Hz.

The emitter and the receiver in ultrasonic fork sensors are set up as a light barrier in a single housing. This simplifies installation because there’s no need for sensor alignment. Easy sensor set-up by pressing the teach-in key provides for optimum convenience and user-friendliness.