Open AccessConductivity Effect on the Capacitance Measurement of a Parallel-Plate Capacitive Sensor System
Author(s) -
P. Azimi Anaraki
Publication year - 2016
Publication title -
kontribusi fisika indonesia
Language(s) - English
Resource type - Journals
ISSN - 0854-6878
DOI - 10.5614/itb.ijp.2011.22.4.2
Subject(s) - capacitance , capacitive sensing , distilled water , materials science , capacitance probe , conductance , conductivity , air gap (plumbing) , electrical engineering , differential capacitance , optoelectronics , sensitivity (control systems) , electrical resistivity and conductivity , analytical chemistry (journal) , acoustics , composite material , electronic engineering , chemistry , electrode , engineering , chromatography , physics , condensed matter physics
In this article design and operation of a parallel-plate capacitive sensor based on the dielectric capacitance and conductance change of the gap medium is reported. The designed system was used to determine characteristics of different water liquids as a result of the capacitance variations. The air gap capacitance is measured and then by filling the gap with a liquid the capacitance is monitored for different liquids. Proposed sensor is used for the distilled, tap, boiled, and salt water measurements and the capacitance results are compared. A big difference about 45.5µF in capacitance values for the salt and distilled water shows a high sensitivity, which can be used to recognize different water liquids. The experimental results are promising for water liquids and verify the successful operation of such a device as a liquid sensor, a useful method for checking the electrical quality of the water that is required for different applications.