The delivery of quality appropriate to the application is something we take for granted. Our QA system is certified according to ISO 9001 (production site Northbrook IL / USA) and ISO/TS 16949 (production site Esslingen and Heidelberg, both Germany). Our work is backed up by an innovative CAQ program.


The testing of spring load is a process which presents countless difficulties. For interesting information about theory and practice, you can download the according PDF

  • Load testing

    Uncertainty of measurement of load testers: Definitions and requirements

  • Calibration of diaphragm spring testing machine to DIN EN ISO 7500-1
  • The HÄUSSERMANN Load Tester

    A practical example how to calibrate a load tester and to find its uncertainty of measurement

  • The HÄUSSERMANN inter-laboratory test:

    How to detect the "true" load reading

  • Cross-checking spring loads

    or: What to do with test discrepancies?

  • Measuring the diameters of diaphragm springs

    Why should diameter be measured in flat position?