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Micromachines 2017, 8(4), 112; doi:10.3390/mi8040112

A Feasibility Study on the Simultaneous Sensing of Turbidity and Chlorophyll a Concentration Using a Simple Optical Measurement Method

1
Graduate School of Engineering, Tottori University, Tottori 680-8552, Japan
2
Environment Sanitation Research Center, Tottori 682-0704, Japan
*
Author to whom correspondence should be addressed.
Academic Editors: Wei Wang, Chia-Hung Chen, Zhigang Wu and Nam-Trung Nguyen
Received: 31 December 2016 / Revised: 10 March 2017 / Accepted: 23 March 2017 / Published: 1 April 2017
(This article belongs to the Special Issue Optofluidics 2016)
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Abstract

We have been developing a wireless sensor network system to monitor the quality of lake water in real time. It consists of a sensor module and a system module, which includes communication and power modules. We have focused on pH, turbidity and chlorophyll a concentration as the criteria for qualifying lake water quality. These parameters will be detected by a microfluidic device based sensor module embedded in the wireless sensor network system. In order to detect the turbidity and the chlorophyll a concentration simultaneously, we propose a simple optical measurement method using LED and photodiode in this paper. Before integrating a turbidity and chlorophyll a concentration sensor into the microfluidic device based pH sensor, we performed feasibility studies such as confirmation of the working principle and experiments using environmental water samples. As a result, we successfully verified our simultaneous sensing method by using a simple optical setup of the turbidity and the chlorophyll a concentration. View Full-Text
Keywords: water quality monitoring; turbidity; chlorophyll a concentration; optical setup; wireless sensor network water quality monitoring; turbidity; chlorophyll a concentration; optical setup; wireless sensor network
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Isoyama, R.; Taie, M.; Kageyama, T.; Miura, M.; Maeda, A.; Mori, A.; Lee, S.-S. A Feasibility Study on the Simultaneous Sensing of Turbidity and Chlorophyll a Concentration Using a Simple Optical Measurement Method. Micromachines 2017, 8, 112.

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