Returning non-defective devices
We want to make sure that the process is handled as quickly and smoothly as possible.
If you received an incorrect delivery or the order has not been correct, please consult our sales or support team. After consultation please fill out the form.
After filling out the form you will receive an email with the information you provided.
Please attach the signed email when returning the devices. This allows us to allocate the devices accordingly.
Thank you for your support
New contact details
Guntermann & Drunck GmbH Systementwicklung
Obere Leimbach 9
57074 Siegen - Germany
Phone: +49 271 23872-0
Fax: +49 271 23872-120
You can contact us
Mondays to Thursdays:
from 06:00 a.m. to 6:30 p.m. (CET)
from 06:00 a.m. to 5:00 p.m. (CET)
Send an email to
or free of charge via phone
00800 5509 6000*
This service number cannot be reached from some regions or service providers.
In that case, you can still call us on +49 271 23872-488