The Gemini rheometer is optimised for both strain and stress controlled operation. The Gemini is available with a full range of temperature controllers. This allows testing on a full range of materials including polymer melts, composites, fluids and semi-solids.
The Rotonetic drive enables testing in all conventional strain and stress controlled modes including stress relaxation,
creep and viscometric modes.
Oscillation testing is available in either direct strain or stress controlled modes. Direct strain operation of oscillation allows preset strain amplitudes to be imposed upon the test sample without iteratively adjusting the stress on a cycle-by-cycle basis. A new feature, partial wave sampling, also enables rheological data to be gathered using just part of a full oscillation cycle. When used in conjunction with direct strain control, partial wave sampling makes low frequency testing far less time consuming and more practical.