Research and Development of Low-Cost Dissolved Oxygen Sensor
Date Issued
2005
Date
2005
Author(s)
Yu, Chen-Hsun
DOI
zh-TW
Abstract
ABSTRACT
In order to ensure the successful cultivation of aquaculture, it is necessary to establish the water quality monitoring system. Because it isn’t a uniform distribution of dissolved oxygen in water quality, we need many sensors to detect the distribution. Since the dissolved oxygen sensor is very expensive, it would cost abundant expenditure to establish a monitoring system for cultivation. Therefore, the study focuses on developing the low-cost dissolved oxygen sensor by the principle of fabrication and design.
The basic principle of a dissolved oxygen sensor is Galvanic cell. The voltages magnitude and the dissolved oxygen is direct ratio according to oxidation-reduction react ion. The study has five factors, which are difference of metal electrode, material of membrane, measured membrane area, wire length and material. Trend line slope, related coefficient, sensitivity, according to increasing oxygen and reducing oxygen process device from experiment obtained, that determined the suitability and characteristic for each factors. Finally, the artificial dissolved oxygen sensor's materials include Ag + Zn electrode, P.E. membrane, KCl solution, manufactured acrylic tube and general wire 5 meter. It cost about NT 300 dollars totally. It will provide the aquaculture industry economic products in future and application to different type of water.
Subjects
感測器
溶氧
低造價
電氣化學
sensor
dissolved oxygen
low-cost
electrochemistry
Type
thesis
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