Turbidity Monitoring of Freshwater Using Internet of Things Platform

Abstract

This article discusses the development of the monitoring system of fresh water turbidity level. The objective of this article is to monitor the turbidity level of the water continuously and remotely. The monitoring system was developed by using a turbidity sensor and ESP32. The measured turbidity level in Nephelometric Turbidity Units (NTU) was then sent to the internet of things platform namely ThingSpeak cloud computing platform by using wireless fidelity (wifi) networks so that it could be accessed by using Android smartphone or computer. The obtained monitoring system was tested on the laboratory scale fresh water body placed in the acrylic box with dimensions of 25cm × 19cm × 31cm. The test results showed that the monitoring system was able to monitor the turbidity level constantly on various conditions, i.e. fresh water without any substance addition and when sedimentation substances were gradually added into the water body. The output of turbidity sensor (in volt) was linear with the obtained NTU level. In the future, the monitoring system should be enhanced for actual condition of fresh water especially for sources drinking water.