The ISR1 is an instrument with a very high sensitivity and is therefore suitable for less dense and rigid layers, where other shear instruments based on forced oscillations cannot be applied.
In shear rheology the experiments are performed such that the viscosity and elasticity of the interfacial layer are measured. Typical experiments are those using a torsion pendulum, as it is the case in our ISR1. The shear visco-elasticity is an excellent measure for the quantification of structure formations in interfacial layers. The ISR1 is an instrument with a very high sensitivity and is therefore suitable for less dense and rigid layers, where other shear instruments based on forced oscillations cannot be applied.
allows measuring the interfacial shear elasticity and viscosity of layers between two fluids (liquid/liquid or liquid/gas).
The main principle is a torsion pendulum.
Different measuring bodies are used to work at liquid surfaces or at interfaces between two immiscible liquids.
ISR-1 allows unique shear rheological experiments and is suitable for studies of adsorption layers (GIBBS-layers) and spread layers (LANGMUIR-layers).
frequency range between 0.2 and 0.02 Hz (depending on the measuring body and the torsion wire used)
shear elasticity and viscosity of a surface layer
time resolution about 1 minute
time dependencies over hours of interfacial age
surface shear viscosity range 1µNs/m to 100 mNs/m
surface shear elasticity range 1µPam to 100 mPam
temperature control in the range 10 to 50 °C
| Parameter | Specification |
|---|---|
| Interfacial shear viscosity | 1 μNs/m to 100 mNs/m |
| Interfacial shear elasticity | 1 μPam to 100 mPam |
| Range of frequency | 0.02 – 0.2 Hz |
| Angular resolution | Torsion head: 0.01° | Position sensor: 0.01° |
| Data acquisition & Software | via RS 232, USB | Windows compatible |
| Measuring options | Adsorbed and spread layers at liquid/gas and liquid/liquid interfaces |
| Physical Data | Size: 500 x 500 x 700 mm | Weight: 40 kg |
| Power supply | 100 … 240 AC; 50 … 60 Hz; Consumption: 110 W |
| Extra accessories | Measuring body (bi-conical disc) for liquid/liquid interfaces |
Our high-performance software provides real-time fast drop profile analysis and precise data acquisition. Designed for accuracy and intuitive workflow, it allows seamless control of all measurement parameters.
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