Still there for you even in lockdown!

Business operations ensured in compliance with current hygiene regulations.
Your health and the health of our employees is our top priority. We have been working according to a hygiene concept for weeks, and we take the behavioral measures of the RKI very seriously. Immediate calibrations and personal deliveries are still possible in compliance with all current regulations. Please pay attention to the designated hygiene rules on site. 


#Safe storage and transport protection (10 & 15 kg)

We would be pleased to arrange appointments for the calibration or repair of your Light Drop-Weight Tester by phone +49 3931 25273-20, by E-Mail or viaWebseite.

Contemporary quality assurance from the technology leader ZORN INSTRUMENTS

Highly precise test technology from in-house production

Users in more than 80 countries of the world trust the technical innovations from ZORN INSTRUMENTS

For more than seven decades, we have time and again developed and produced new highly precise tools for quality testing in industrial applications. Whether quick tests during road construction or classic material tests in the laboratory. With our combination of inventiveness, excellent craftsmanship and proximity to the customer, we offer appropriate solutions for the continuously changing requirements in the area of quality assurance.


Load-bearing capacity testing in earthworks

ZFG - Lightweight Deflectometer

The Lightweight Deflectometer ZFG for the quick testing of the load-bearing capacity of compacted soils is the flagship of the ZORN INSTRUMENTS range.

The current models ZFG 3.0 and ZFG 3000 GPS are setting standards for the implementation of the so-called "dynamic plate load test" on the construction site. In only two minutes, even inexperienced users can test the quality of the compaction of courses of material applied. Existing soils can also be tested effortlessly for their load-bearing capacity using a ZFG. The usage of the devices is covered by recognised technical standards worldwide, such as the German TP BF-StB, Part B 8.3 or the North American ASTM-E 2835-11.

To the Falling Weight Deflectometer

Your upgrade, also for older ZFG models.

ZORN D PLUS - the Bluetooth controller for your Lightweight Deflectometer

Do you now do absolutely EVERYTHING with your smartphone? Then connect the ZORN D PLUS to your ZFG. The ZORN FG mobile app automatically connects your Android or iOS smartphone to the Lightweight Deflectometer via Bluetooth. Undertake measurements as usual, prepare complete test records and send them straightaway by e-mail. Everything in one go. Of course, the app also works on tablets.

The ZORN D PLUS also determines the air temperature at the test point and warns about the risk of frost. The GPS co-ordinates of the measurement are determined directly on the loading plate. Photographs and information about the soil material tested, the weather or other conditions on the construction site can be added to the record easily.

To the Falling Weight Deflectometer

Custom manufacture

ZORN INSTRUMENTS offers special and custom manufacture for high-precision test products. 

Anyone who needs a specific measuring device for very special purposes is in exactly the right place at ZORN INSTRUMENTS: Here we manufacture precision products suitable for very special applications.  We have an appropriate solution for almost any test problem. 

Application areas

Fräsen und Drehen von Spezialwerkzeugen
Fräsen und Drehen von Spezialwerkzeugen Wir drehen und fräsen Spezialwerkzeuge, Ersatzteile etc. für die Automobilbranche, Medizintechnik, Lebensmitteltechnik usw. Individuell, präzise, kurzfristig.