Christmas holidays from December 23rd, 2020 to January 3rd, 2021 - Happy Holidays!

Technical support / service

In addition to our high-quality products, we offer comprehensive and professional customer service and technical support.

Our contact persons and specialists will be gladly available for your questions concerning our products and services.

Technical hotline +49 2333 861 77 03

Repeated examination and calibration

For voltage testers over 1 kV, the period of repeated examination may not exceed 6 years. This is also recommended for voltage testers up to 1000V.

Depending on the area of application and the demands on the measuring and testing equipment, a repeated examination or a recalibration within a shorter period of time may be advisable.


We have very high demands on our measuring and testing equipment, which is subject to constant quality control.
Most modern electronics and high-quality materials guarantee a long life.

If a tester shows a damage or malfunction, you can have it repaired quickly and unbureaucratically.

Please send back the device to:

Rudolph Tietzsch GmbH & Co. KG
Willringhauser Str. 18
58256 Ennepetal

On site for you

Specific application place special demands on the measuring and testing equipment.

We would be glad to come to you to support you in special applications and develop joint solutions.

We will find your solution

Are you looking for measuring and testing equipment for special applications?

Our service:
We would be pleased to advise you on specific problems and find tailor-made solutions. With our team of specialists and many years of experience, we demonstrate our strength and flexibility, even in small series.

We look forward to new challenges.