Abstract
In order to ensure the remaining volume of liquid inside a tank that is normally checked manually and frequently, an unmanned monitoring system is proposed. The proposed system is developed based on the concept of Internet of Things (IoT). This paper presents a prototype for tank level monitoring. The prototype utilises SRF HC-SR04 sensor to measure the liquid level. Arduino Uno microcontroller is implemented to assist the data processing before any notification is sent to the user. The remaining liquid volume and LED notification are shown as the output of the prototype. Some testing have been conducted to observe if the prototype works fine and to measure any error during implementation. Result shows that the relative error is less than 2% and the standard deviation is less than 5%.
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