A addition to the Bohlin Gemini family of rheometers from Malvern Instruments is optimized for the control of ultra-low torques, and opens up opportunities to probe weak or sensitive material structures and low viscosity systems..
Like all previous Bohlin High Resolution rheometers, the
Bohlin Gemini HR nano offers advanced technology with straightforward operation. While enabling the measurement and control of nano-torque levels, it retains a continuous working torque range to 200 mNm allowing complete rheological characterization. Allied to the most sensitive normal force measurement available, the Gemini HR nano offers the ultimate in instrument capabilities for weakly-structured systems.
Development of this rheometer has been made possible through the continued advancement of Malvern's state-of-the-art air bearing design coupled with its patented Rotonetic
TM 2 DSP drive system. The Bohlin Gemini HR nano's unsurpassed range and sensitivity allows torque and speed control across all steady, dynamic and transient test modes. Both strain controlled and stress controlled tests can be performed with ease.
The unique 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 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 therefore more practical.
As modular systems, the Bohlin Gemini rheometers offer a wide range of measurement geometries and accessories, with quick and easy configuration enabling their use for many different materials and applications. EasySwap
TM temperature controllers include integrated Peltier devices, a forced gas oven with optional liquid nitrogen cooling, electrical heating and a variety of fluids circulators. Windows-based software allows easy programming for any test protocol and is equally suited to advanced research or routine QA/QC applications.
Malvern rheometer optimized for nano-torque control
