Kappa Multistation Creep Testing Machine

Space-saving and low cost testing solution for plastics testing.

The Kappa Multistation is a flexible, compact, high-precision electromechanical creep testing machine with individually controlled load axes. It was specially designed for the analysis of the creep behavior of plastics and polymer materials at modern R&D laboratories.

Creep testing machine Kappa Multistation 5x10 kN

Key Advantages and Features


This creep testing machine is the optimal testing solution for applications such as creep tensile tests and creep flexure tests on plastics to ASTM D2990, ISO 899-1 (tensile test) and ISO 899-2 (flexure test). Due to the versatility of this testing system, quasi-static tensile, compression, and flexure tests, as well as relaxation tests and expanded creep tests can also be performed on other materials. The Kappa Multistation is available in the measurement range of 5 N up to 50 kN per load axis and is often combined with an optical multistation strain measurement system and a temperature chamber.

Advantages and features

  • Versatile creep testing system with 3 to 6 independently controlled load axes in one test frame
  • Extremely low cost and space-saving design with a robust test frame
  • Stepless force and temperature sequences, as well as force- and strain-controlled tests (closed loop) are possible
  • No influence on sensitive specimens with the use of non-contact strain measurement system according to the ISO 899-1 recommendation
  • A common temperature zone for all test axes with a temperature chamber of -70°C to +250°C
    Equipment option: a second temperature chamber for complete and profound analysis of the material properties at different temperatures, such as tests according to the stepped isothermal method (SIM)
  • Simulation of different environmental conditions (temperature and humidity control)
  • Use of high-precision load cells
  • Test monitoring and analysis with testXpert III software

Technical data


Kappa Multistation

Test load per test axis, Fmax



Number of test axes

5 (if required by the customer, 6 test axes are also possible)

Distance between the axes



Crosshead travel, max.



Lateral guidance of the crosshead

Precision friction bearings on two hard-chromed columns (30 mm diameter)

Test speed range

0.001 mm/h to 100 mm/min

Return speed



Test speed accuracy

< ±0.1 % (measured over an interval of min. 5 s or 10 mm travel)

Position transducer travel resolution



Test frame dimensions













Supply voltage



Installed power load per test axis



Temperature Chamber and Non-Contact Strain Measurement with Kappa Multistation

Temperature chamber for the Kappa Multistation

Temperature chamber

  • Temperature range from -70 °C to +250 °C
  • Temperature tolerance from ±2 K to 150 °C
    Temperature tolerance from ±3 K to 250 °C
  • Self-supporting, double-wall stainless steel housing
  • View window with four-pane glass on the rear side of the temperature chamber for non-contact strain measurement with video extensometer
  • Optimal heat distribution via two heating coils and two fans (air flow principle)
  • Equipped with PT100 temperature sensor and Teflon bushings for upper and lower feedthrough of the load strings
Video extensometer for Kappa Multistation

Non-contact video extensometer

  • Intended for the measurement of the extension of the specimen during tensile, compression, and flexure tests
  • One camera per test axis
  • Quick test setup
  • No influence on the specimen and the test temperature
  • Mounting of sensor arms is not necessary
  • Flexible measurement lengths and measurement ranges
  • Easy access due to mounting outside of the chamber
  • Application options span the entire temperature range of the temperature chamber

TGM determines the Long-Term Creep Behavior of Polyethylene Materials with the Kappa Multistation

The Department of Plastics Technology and Environmental Engineering at the TGM Federal Institute of Technology tests the temperature resistance and long-term material behavior of polyethylene for a number of applications, especially gas pipes and infiltration boxes (storm water boxes). The typical determination of long-term creep behavior used today involves an extremely tedious and costly process. With the time-saving Stepped Isothermal Method (SIM), TGM can simulate material behavior over a time span of more than 100 years, in a short period of time.
Kappa Multistation 3x10 kN