Water Quality Measurement System for Bottled Drinking Water Using Linear Regression Comparison Analysis

Water has emerged as a critical necessity for the sustenance of human existence in the present era. Water contains several chemicals, such as the measurement of hydrogen ion concentration (pH) and the total amount of dissolved solids (TDS). It is of utmost importance to consume water that possesses a stable pH and total dissolved solids (TDS) levels. Nevertheless, if an individual ingests water with a pH level that deviates significantly from neutrality towards either acidity or alkalinity, it might lead to adverse effects on both muscular and digestive functions. If individuals ingest water with an elevated total dissolved solids (TDS) concentration, it can lead to a decline in renal function. Hence, the present study aims to develop a system capable of quantifying pH and TDS levels by employing a pH sensor and a TDS sensor. Subsequently, the processed sensor data will be presented through a digital display on the 16x2 LCD. The calibration procedure for the pH sensor and TDS sensor involves the utilization of the linear regression technique. The system has the capability to assess pH levels with error rates ranging from 0.19 to 0.44 for TDS, as well as 19 to 41 ppm. The performance of the pH sensor system achieves a level of 97.6%, while the total dissolved solids (TDS) system attains a level of 70%.