DHR2 Rheometer
Discovery Hybrid Rheometer 2 (DHR-2) is an advanced rotational rheometer with a combined motor and transducer (CMT) design. It has a patented drag-cup motor, the second generation of magnetic bearing, a force-rebalance transducer (FRT) for normal force control, and a true position sensor (TPS) combined in a single-head hybrid rheometer. It is a powerful tool for characterizing the flow properties of liquids and the mechanical properties of soft solids such as gels.
Specification
Available measurements
Steady flow
Viscosity
Newtonian/non-Newtonian behavior
Dilatant/pseudoplastic behavior
Oscillatory measurements
Storage and Loss moduli, loss factor (tan delta)
Thermomechanical spectrum
Linear viscoelasticity region (LVR)
Rubbery plateau modulus
Reptation time
Gelation point, crossover modulus, frequency, temperature
Small and large amplitude oscillatory shear (SAOS, LAOS)
Creep (constant stress deformation)
Stress relaxation
Temperature tests
Combined tests
Technical parameters
| Minimum torque (oscillation) | 2 nN·m |
|---|---|
| Minimum torque (steady flow) | 10 nN·m |
| Maximum torque | 200 mN·m |
| Torque resolution | 0.1 nN·m |
| Minimum frequency | 1.00·10–7 Hz |
| Maximum frequency | 100 Hz |
| Minimum angular velocity | 0 rad·s–1 |
| Maximum angular velocity | 300 rad·s–1 |
| Displacement resolution | 10 nrad |
| Maximum normal force | 50 N |
| Normal force sensitivity | 5 mN |
| Normal force resolution | 0.5 mN |
Gallery
Publications
JU, X.; PALACKA, K.; VELLUVAKANDY, R.; MICHALIČKA, J.; PUMERA, M., 2025: Glucose-Powered Ultrasmall Chemotactic Nanorobots for Retinal Degeneration Treatment. JOURNAL OF THE AMERICAN CHEMICAL SOCIETY 147 (49), p. 45405 - 45422, doi: 10.1021/jacs.5c15651 (TITAN, FTIR-CHEMLAB, RIGAKU3, KRATOS-XPS, JASCO, DHR)
SEVRIUGINA, V.; PAVLIŇÁK, D.; ONDREÁŠ, F.; JAŠEK, O.; ŠTAFFOVÁ, M.; LEPCIO, P., 2023: Matching Low Viscosity with Enhanced Conductivity in Vat Photopolymerization 3D Printing: Disparity in the Electric and Rheological Percolation Thresholds of Carbon-Based Nanofillers Is Controlled by the Matrix Type and Filler Dispersion. ACS OMEGA 8 (48), p. 45566 - 12, doi: 10.1021/acsomega.3c05683 (KRATOS-XPS, WITEC-RAMAN, BET-DEGASSER, MIRA-STAN, FTIR-CHEMLAB, LEICACOAT-STAN, DHR)