14 Février 2017

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Chemistry Engineering Ecology / Environment


Chemicals, Materials & Plant-based Materials
Measurement & Instrumentation

Existing techniques for measuring electrical conductivity of hydrophilic films, as ion exchange membranes (IEM), either work with solutions at low concentrations, or provide hard-to-reproduce measures, or require to take the membrane out of its equilibrating solution, thus inducing a bias in the measurement. Our technology is a clamp with two articulated arms that characterizes the IEM with no bias in measurement thanks to a contactless technology enabling on-site measurement with no contact resistance induced. It is compatible with a wide range of concentrations of equilibrating solutions (from 0.01 M to 1 M) and is compatible for membranes or hydrophilic films with a thickness between 50μm and 1 millimeter, making on-site measures convenient and reliable. Measure precision is 1% for solutions with a concentration inferior to 0.1 M and 3% for 1 M concentrations.

Competitive advantages :

  • Compatible with a wide range of equilibrating solutions concentrations
  • Highly accurate & reliable & reproducible measurements
  • Portable
  • On-site measures (with the membrane in electrolyte)
  • No-use of mercure
  • Wide range of concentrations
  • Non-destructive testing of supports
  • Measurement of alternating current at different frequencies, or direct current

Applications :

  • Water desalination
  • Water treatment for drinking water
  • Agribusiness (milk, fruit juices etc.)
  • Industrial wastewater

Keywords : Clamp, Electrical conductivity, Ion-exchange membranes (IEM), Hydrophilic films, NF X45-200 norm

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