DIFFU-THERM is a trademark of Helmut Klumpf Technische Chemie KG, a company which produces for over 50 years now products for non-destructive material testing. In all these years we live the combination of a tradinghouse and manufacturer and our products are used worldwide when a non-destructive surface crack test for metallic and sometimes also non-metallic surfaces is needed. We offer two different methods for the crack testing: the Liquid penetrant Testing and the Magnetic particles Testing. The Liquid penetrant Testing is the oldest German red-white penetration method. It was developed and patented by Helmut Klumpf senior in 1943. The DIFFU-THERM-methods offer many advantages like a maximum reliability of the test result, a simple operation, a quick performance of the test procedure and an economical testing. Nearly all materials can be tested with these non-destructive testing methods.

Helmut Klumpf
+49 2366 1003 0
Find us at S 29

Product and Service Categories

  • Magnetic Particle Testing (MT)
    • Magnetic Inks/Powders
    • Systems
  • Liquid Penetrant Testing (PT)
    • Accessories
    • Liquids
    • Penetrants
    • Systems


Steffi Dehlau
German Society for Non-Destructive Testing (DGZfP)
Max-Planck-Str. 6
12489 Berlin Germany
Tel: +49 30 67807-120

WCNDT 2016

The 19th World Conference on Non-Destructive Testing from 13-17 June 2016 in Munich, Germany is the most important event in our global NDT community.

You are cordially invited.