Ultrasonic fork sensors detecting transparent labels

Treotham presents ultrasonic fork sensors from Wenglor designed to
ensure perfection in product labelling applications.

Accuracy is an important factor in product labelling as errors are perceived
as a product defect in packaging processes. Wenglor’s ultrasonic fork sensors reliably
monitor the presence of dark, transparent or printed labels on roll holders
before application to packages by label dispensers, ensuring labelling
accuracy. The client not only has the assurance of high quality standards but is
also able to avoid costs resulting from scrap due to incorrectly labelled

Wenglor’s ultrasonic fork sensors are designed to detect all types of
labels including paper, plastic, printed and transparent, regardless of base
material, colour, degree of transparency or surface characteristics.

Even transparent labels on transparent base materials can be detected at
high process speeds, thanks to the varying ultrasound attenuation resulting
from different material thicknesses. This is 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 just 2mm is enough to reliably
detect labels at a switching frequency of up to 400 Hz.

Key features of Wenglor’s ultrasonic fork sensors include single housing
for emitter and receiver, set up together as a light barrier; no need for
sensor alignment, simplifying installation; and easy sensor setup by simply
pressing the teach-in key, providing for optimum convenience.

For more information, please visit the Treotham
Automation website, www.treotham.com.au
or call 02 9907 1788.

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