| http://www.w3.org/ns/prov#value | - This new type of ion-selective potentiometric sensor incorporates a thin and substantially uniform electrically conducting layer (131) which comprises a carbon material, such as carbon, carbon black or graphite, the carbon material being in the form of particles of size at the most 100 ??m, and a binder comprising a polymer, such as an acrylic or epoxy polymer, PVC, PUR or polystyrene.
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