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