Process instrumentation for impedance spectroscopy - a modular conceptNacke, T.; Land, Raul; Barthel, A.BEC 2008 : 2008 International Biennial Baltic Electronics Conference : proceedings of the 11th Biennial Baltic Electronics Conference : Tallinn University of Technology : October 6-8, 2008, Tallinn, Estonia2008 / p. 235-238 : ill