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2011 (Vol. 3, Issue: 01)
Article Information:

Conductivity Effect on the Capacitance Measurement of a Parallel-Plate Capacitive Sensor System

M. Heidari and P. Azimi
Corresponding Author:  Peyman Azimi 

Key words:  Capacitance, conductivity, permittivity change, sensor, water liquids, ,
Vol. 3 , (01): 53-60
Submitted Accepted Published
2010 December, 06 2010 December, 25 2011 January, 20

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 45.5 :F 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.
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  Cite this Reference:
M. Heidari and P. Azimi, 2011. Conductivity Effect on the Capacitance Measurement of a Parallel-Plate Capacitive Sensor System.  Research Journal of Applied Sciences, Engineering and Technology, 3(01): 53-60.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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