Abstract:
With abundance of water on the earth the fresh water sources are limited. So a need arises to precisely measure this resource in many industrial and commercial places wirelessly. Many measurement techniques for liquid such as float, pressure gauge, ultrasonic and radar are available. Floats and pressure gauge suffer from cumulative error which increases with time whereas ultrasonic and radar give very small measuring errors but are very costly. So, an immediate need is felt for measuring the level of conducting liquid with reasonable accuracy and low cost. The proposed sensor node is supposed to measure a considerable range with a minimum error. It will be environment friendly, low power consumption and high accuracy device. It can serve as a calibration gauge to other sensor such as pressure and float used in conjunction with it. A solar panel and battery backup will aid the gauge to be installed at remote places where supply is partially or not available at all, this scheme would make the unit self dependent. An additional feature added will be of wireless transmission of data from sensor node to the master unit. A smart self powered sensor node with wireless data transmission capability will be implemented and presented in this paper.

Keywords: Wireless, sensor node, conducting liquid