Development and Applications of a Liquid Conductivity Tester

Abstract

The measurement of liquid conductivity plays a pivotal role in numerous industrial processes and scientific applications where the precise monitoring of electrical conductivity in liquids is critical for ensuring product quality, process efficiency, and regulatory compliance. The need to know how much different water samples (sachet water, well water and salty water) conduct electric current led to the development of this instrument. The project focuses on specific aspects to ensure a well-defined and achievable outcome; it entails the use of an Arduino Board microcontroller (ATMEGA328) in place of a micro-controller and other basic electronic components such as 10k resistor, power source, copper clip as well as conductivity sensor. This project takes advantage of the ability of an Arduino board to take input from an external source and perform operations on it based on the program uploaded on the Arduino. The designed meter gives accurate measurements that can be used for industrial purposes. This conductivity tester aims to address needed demands for accurate and cheaper means of measuring electrical conductivity of liquids in various industries and homes. The meter is designed with the use of advanced conductivity probe or sensor with an Arduino Nano board for accurate and timely measurement. An Arduino code programme was used for the measured values to avoid variations in sample conductivity and accuracy when compared with standard values. Measurements carried out with this meter was compared with calibrated standard values and the results shows good correlation coefficients ranging from 0.98 to 0.99. This device is user friendly, and cheaper both in design, maintenance and accurate precision for use in industries.