Title :
Capacitive sensor for methanol concentration measurement in direct methanol fuel cells (DMFC)
Author :
Doerner, S. ; Schultz, T. ; Schneider, T. ; Sundmacher, K. ; Hauptmann, P.
Author_Institution :
Inst. of Micro & Sensor Syst., Otto-von-Guericke Univ. of Magdeburg, Germany
Abstract :
A compact in-situ measurement of methanol concentration in the liquid feed of direct methanol fuel cells (DMFC) by a capacitive sensor is presented. The measurement approach uses impedance spectrum analyzer electronics and is suitable for use under process conditions. Calibration of the measurement system for the required temperature range is done with selected reference liquids.
Keywords :
capacitive sensors; chemical variables measurement; electric impedance measurement; fuel cells; process monitoring; spectral analysers; calibration; capacitive sensor; direct methanol fuel cells; impedance analyzer; impedance spectrum analyzer electronics; liquid feed; methanol concentration measurement; Calibration; Capacitive sensors; Dielectric measurements; Electrodes; Feeds; Fuel cells; Impedance measurement; Methanol; Permittivity measurement; Temperature sensors;
Conference_Titel :
Sensors, 2004. Proceedings of IEEE
Print_ISBN :
0-7803-8692-2
DOI :
10.1109/ICSENS.2004.1426247
