18 September 2003 Measurement of pond temperature and pH using an aqueous sensor network
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We report on the development and application of an aqueous sensor network (ASN). Designed for operation in lakes or drinking water reservoirs, the immersed ASN nodes are secured in place at a controlled depth by use of anchors with a node to node separation distance of ≤ 20 m. The individual nodes are integrated with various types of sensors enabling measurement of both physical and chemical analyte parameters. Node operation is overseen by programmable microcontrollers; the software on the microcontrollers is structured in a modular format so it can adapt to different types of sensors without extensive reprogramming. Node-to-node communication is achieved using timed bursts to avoid interference from unwanted signal reflections arising from the impedance mismatch at the water-air and water-land interface. We report on the application of the ASN for monitoring temperature and pH throughout a small pool. As desired the individual nodes of the ASN can be integrated with suitable chemical/biological sensors to detect down stream effluents from a source, or to ensure water reservoir quality.
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Keat Ghee Ong, Keat Ghee Ong, Xiping Yang, Xiping Yang, Niloy Mukherjee, Niloy Mukherjee, Haidong Wang, Haidong Wang, Craig A. Grimes, Craig A. Grimes, } "Measurement of pond temperature and pH using an aqueous sensor network", Proc. SPIE 5090, Unattended Ground Sensor Technologies and Applications V, (18 September 2003); doi: 10.1117/12.487765; https://doi.org/10.1117/12.487765

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