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Design Environmental’s Sigma range of liquid-nitrogen-cooled Halt/Hass chambers is specifically designed to interface with a multi-axis pneumatic vibration table.

Sigma chambers, which are CE marked, have an energy-efficient design and are able to withstand the rapid temperature cycling of the test item, which is introduced to cause different rates of expansion and contraction in the various components of the test item, thereby imparting stress and causing premature failures to improve the long-term reliability of the product under test.

The chamber is interfaced with a patented vibration table offering high-energy broadband random vibration with six degrees of freedom.

Combining the two environments provides an effective method of improving product reliability and reducing field failure costs, according to the company.

Vibration can be input during preselected temperature ramps or dwells or independently.

Key features include: vibration tables measuring 1.1 x 1.1m, 0.9 x 0.9m and 0.6 x 0.6m; simultaneous 6 DOF random vibration; a typical 100Grms 5-10,00Hz measure on the table surface Z axis; a repeatable vibration spectrum; 90 per cent of vibration energy in the 5-4,000Hz bandwidth; +/-1Grms following one minute of stabilisation; a temperature range of +200C to -100C; three chamber volumes to suit vibration tables; a rate of temperature change up to 80C/min; selectable control from air stream to product; a Windows-based interface for temperature/vibration control; data logging and analysis software; and variable high air velocity.

Weiss Technik UK is part of the Weiss Group, the world’s largest manufacturer of environmental testing equipment and one of four divisions of the Schunk Group. The Weiss Group division brings together environmental simulation technology and climate technology expertise. Solutions are used around the world in research, development, manufacturing and quality assurance.


In 2013, following a combined presence in excess of 55 years, two respected leaders in environmental testing solutions, Weiss Gallenkamp and Design Environmental, merged to form Weiss Technik UK.

Weiss Technik UK employs a team of over 90 staff across three office locations and a manufacturing plant in the United Kingdom and Germany.


Our environmental simulation product range includes Weiss and Vötsch test chambers and rooms for automotive, temperature and climatic, environmental stress screening, corrosion and pharmaceutical stability testing. We also offer sports science rooms, laboratory and industrial ovens and fingerprint development chambers.


We’ve built our long-standing reputation as a trusted supplier of environmental testing products through technological innovation and service excellence.

We supply small-scale bench top environmental chambers through to the largest customised multi-room controlled environment facility.


Our customers include Mercedes F1, Rothamsted Research, Syngenta, BASF, GlaxoSmithKline, PepsiCo, Dunlop, the FBI, Airbus and Bosch.

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