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Journal of Applied Sciences
Year: 2011  |  Volume: 11  |  Issue: 18  |  Page No.: 3293 - 3300

Effect of the Reactance Term on the Charge/discharge Electrical Measurements using Cylindrical Capacitive Probes

G. Behzadi, L. Fekri and H. Golnabi    

Abstract: In this study, operation of the contact Cylindrical Capacitive Sensor (CCS) for the reactance capacitance measurement of the water liquids by using the charge/discharge measurement module is investigated. The effect of geometric factor on the capacitance measurement of different liquid samples is also studied. The measured capacitances for the distilled, mineral, tap and salt water samples are reported by using two contact CCSs with the active length of 16 and 74 mm. The measured capacitances by small contact CCS for the salt water is 1.76 μF and by big contact CCS is 47.8 μF, which shows a big difference for different probes. In another study, the effects of the liquid conductance on the capacitance values are theoretically investigated. The obtained results for different water liquids show that by increasing the conductance of the sample liquids both the stream discharge current and the stored load charge on the cylindrical electrodes are decreased, accordingly.

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