[Micromachines] A Feasibility Study on the Simultaneous Sensing of Turbidity and Chlorophyll a Conce
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.
Ryota Isoyama 1, Manami Taie 1, Tomoaki Kageyama 1, Masashi Miura 1, Akihiro Maeda 2, Akihiro Mori 2 and Sang-Seok Lee 1,* 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.