9 - 11 April 2019 // Nuremberg, Germany

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Exhibitors & Products POWTECH 2017
Zoom product LOGO_DWS RheoLab III

DWS RheoLab III

LOGO_DWS RheoLab III

DWS RheoLab III

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The need to understand the rheological properties of natural or formulated substances containing small particles has become a main field of interest for many laboratories working on polymers, surfactants, micelles, thickeners, etc.

With the DWS RheoLab such crucial information can be accessed conveniently and quickly using a novel principle for optical rheology: The instrument monitors the thermal motion within the sample with nanometer resolution  using Diffusing Wave Spectroscopy (DWS) and automatically translates this information into rheological data. This approach is called microrheology and the obtained data can directly be compared to what a conventional mechanical rheometer measures in oscillatory mode in the linear viscoelastic regime.

Prominent features include:

  • Fully automated DWS Microrheology measurement
  • Applicable to all homogeneous transparent or opaque samples
  • Fluid with a large range of viscosities from 0.1 mPa∙s to 1000 Pa∙s can be measured
  • Storage and loss moduli G'(ω), G''(ω)  in a frequency spectrum 0.1 Hz to 1 MHz (0.1Hz to10MHz with pseudo cross-correlation upgrade)
  • Elasticity range from 1 Pa to 50 kPa
  • Computes the mean square displacement (MSD) of particles
  • Contact-free. No mechanical force applied to the sample: ideal for stability or shelf life studies
  • Monitors time-dependent processes
  • Regulated sample temperature from 4°C to 110°C*
  • Temperature stability < 0.02°C*
  • Compact and robust design
  • Several cuvette sizes available
  • Sample quantity down to 150 μl (for 1 mm thick sample cell)
  • Several options available
  • Particle sizing at high concentrations
  • Online support forum for all customers
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