Interfacial Shear Rheometer ISR-1

The ISR-1 Interfacial Shear Rheometer allows the measurement of interfacial shear elasticity and viscosity of layers between two fluids (liquid/liquid or liquid/gas).


The Interfacial Shear Rheometer ISR-1 allows the measurement of interfacial shear properties of layers between two fluid (liquid/liquid or liquid/gas). It allows unique shear rheological experiments. Shear experiments are most useful for polymer and mixed polymer-surfactant adsorption layers and insoluble monolayers and give access to interaction forces in two-dimensional layers. Dilational interfacial properties are most frequently studied for soluble adsorption layers of surfactants and mixtures of polymers and surfactants.

Range Interfacial Shear Viscosity 1µNs/m to 100 mNs/m
Range Interfacial Shear Elasticity 1µPam to 100 mPam
Range of frequency 0.2 to 0.02Hz
Dimensions (LxWxH) 50x50x70cm (20x20x28’’)
Weight 50kg (110 lb.)

The principle is a torsion pendulum. Different measuring bodies are available to work at liquid surface or interfaces between two immiscible liquids.

  • Time dependencies over hours of adsorption time
  • Shear elasticity and viscosity of a surface layer
  • Frequency range between 0.2 to 0.02 Hz