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Sensors 2015, 15(5), 10569-10579; doi:10.3390/s150510569

Sensor Node for Remote Monitoring of Waterborne Disease-Causing Bacteria

1
Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Daejeon 305-338, Korea
2
Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 291 Daehak-ro, Daejeon 305-338, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Stephane Evoy
Received: 24 March 2015 / Revised: 20 April 2015 / Accepted: 27 April 2015 / Published: 5 May 2015
(This article belongs to the Special Issue Biosensors for Pathogen Detection)
View Full-Text   |   Download PDF [2450 KB, uploaded 5 May 2015]   |  

Abstract

A sensor node for sampling water and checking for the presence of harmful bacteria such as E. coli in water sources was developed in this research. A chromogenic enzyme substrate assay method was used to easily detect coliform bacteria by monitoring the color change of the sampled water mixed with a reagent. Live webcam image streaming to the web browser of the end user with a Wi-Fi connected sensor node shows the water color changes in real time. The liquid can be manipulated on the web-based user interface, and also can be observed by webcam feeds. Image streaming and web console servers run on an embedded processor with an expansion board. The UART channel of the expansion board is connected to an external Arduino board and a motor driver to control self-priming water pumps to sample the water, mix the reagent, and remove the water sample after the test is completed. The sensor node can repeat water testing until the test reagent is depleted. The authors anticipate that the use of the sensor node developed in this research can decrease the cost and required labor for testing samples in a factory environment and checking the water quality of local water sources in developing countries. View Full-Text
Keywords: E. coli; coliform; chromogenic enzyme substrate assay; remote monitoring; water quality check E. coli; coliform; chromogenic enzyme substrate assay; remote monitoring; water quality check
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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Kim, K.; Myung, H. Sensor Node for Remote Monitoring of Waterborne Disease-Causing Bacteria. Sensors 2015, 15, 10569-10579.

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