Service and calibration of the Light Weight Deflectometer (LWD)

Calibration ensures the precise and correct functioning of the Light Weight Deflectometer according to the specifications of the  German Federal Highway Research Institute (BASt) . In addition, the standard-compliant construction and the function of all components from mechanics to measurement technology to the storage of the measurement data on their desired storage medium are checked and adjusted if necessary.

After successful calibration, a sticker with the stated validity of the calibration of one year (similar to the TÜV sticker) is affixed to the load plate, drop weight and measuring computer.

How a calibration works as well as further details on the necessity can be found in the video next to the text or next to other videos in our YouTube Channel.

ZORN Calibration

An in-house calibration stand approved by the BASt according to TP BF – StB Part B 8.4 makes it possible to calibrate Light and Medium Weight Deflectometers in-house. As such there are short channels between production, servicing and calibration. This situation makes possible quick service and short waiting times.

For our customers in Germany we would be pleased to provide a device on loan, free of charge, for the duration of the inspection and calibration of your Lightweight Deflectometer, if necessary. Upon request we offer a pick-up and delivery service or, if you wish, immediate calibration at ZORN INSTRUMENTS.


Calibration contact
Sales International

Telephone: +49 3931 / 25 27 3-116
What's App/Mobile: +49 174 / 24 58 590
eMail: sales(at)