Kinexus ultra+

The Kinexus ultra+ rheometer has the highest sensitivity air bearing and widest torque range, coupled with the unprecedented vertical (axial) control capabilities of the Kinexus platform, for advanced rheological testing. Unique sequence-driven rSpace software enables fully customizable test design to allow researchers to set-up and investigate tailored rheological test protocols.

Kinexus is a rotational rheometer system that applies controlled shear deformation to a sample under test, to enable measurement of flow properties (such as shear viscosity from flow tests) and dynamic material properties (such viscoelastic modulus and phase angle from oscillation tests).

A rotational rheometer system comprises several key components to enable robust, reliable and accessible rheological measurements for a particular sample or application:

  • Rheometer base unit. Control of key system functions, including torque (for stress control), rotational position change (for strain or rate control), normal force and vertical position change (for sample loading and gap set).
  • Measuring system or geometry. The measuring system is the link between the rheometer and the sample, and defines the applied shear field. The type of measuring system must be appropriate to the sample type and the test under consideration.
  • Temperature or environmental control unit. Accurate control is essential since rheological properties are a strong function of temperature and environmental conditions.
  • Instrument software. Rheological testing can be, by its nature, relatively complex to set up. Malvern’s cornerstone Standard Operating Procedure (SOP) approach to material testing has been enhanced in rSpace software to revolutionize and simplify user interaction, and to bring ‘expert system’ guidance and SOP-driven testing to rheological measurements for the first time.

technical Details

Torque range – Viscometry (rate and stress control)
1.0nNm – 250mNm
Torque range – Oscillation (strain and stress control)
0.5nNm – 250mNm
Torque resolution
Position resolution
Angular velocity range
1nrads-1 to 500rads-1
Step change in strain
Frequency range
6.28µrads-1 to 942rads-1 (1µHz to 150Hz)
Motor inertia
Normal Force range
0.001N – 50N
Normal Force resolution
Normal Force response time
Vertical lift speed
0.1µms-1 to 35mms-1
Vertical lift range (measureable)
Gap resolution (over full vertical lift range)