Fig. 3. The measured dielectric constant from the coated part of CUP1 and CUP2 (Kap), CUP3 and CUP4 (Kak), and from the uncoated part of all CUPs (Ku) plotted against the electrical conductivity of the KBr solutions. The solid line represents the predicted Kw according to Eq. [1]. CUP, coateduncoated probe.