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Fig. 11. (a) Calculated sensor capacitances Cmodel with FEP(
) and Cmodel without FEP() for the case where the access tube is coated (hollow circles) and not coated (solid squares) with the 0.5 mm thick the FEP shrink fit with permittivity FEP = 2. (b) Normalized sensor readings Nmodel with FEP() and Nmodel without FEP() derived from Cmodel, with FEP() and Cmodel, without FEP() using Eq. [11] for the case with (hollow circles) and without (solid squares) the shrink fit on the access tube.
