Liquid mixture monitoring using a capacitive sensor system

Publish Year: 1398
نوع سند: مقاله کنفرانسی
زبان: English
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شناسه ملی سند علمی:

ICELE05_169

تاریخ نمایه سازی: 26 بهمن 1398

Abstract:

In this paper design and operation of a capacitive cell sensor for liquid mixture monitoring is reported. The capacitive effect of small drop of different liquids in tap water was studied using this capacitive sensor. A small percentage of contaminating agents such as oil in tap water is determined with a good sensitivity. Important factors concerning operation of the sensor such as the precision, reproducibility, and stability are reported. Output variation of the measured values with the temperature (27-73.5 ˚C) is also investigated for tap water and different water mixtures. An averaged variation of 0.8348 µF/˚C in output measurement for tap water is obtained. Our results indicate an averaged variation of 0.4324 µF/˚C for the fresh oil and a variation of 0.5121 µF/˚C for the used water oil mixture. An averaged variation of 0.4840 µF/˚C for methanol, 0.5048 µF/˚C for the ethanol, and 0.8250 µF/˚C for water antifreeze mixtures are obtained. For water + salt mixture our data shows that the sensitivity change exhibits a factor of 12.69 increases in sensitivity when temperature increases from 24.7 ˚C to 40.0˚C. Hence to determine a trace impurity, this methodology provides more accurate results at low temperatures (room temperature) and requires less temperature compensation for calibration.

Authors

P. Azimi Anaraki

Department of Physics, Takestan Branch, Islamic Azad University, Takestan-Iran