PH sensor design based on potentiometric analysis method
Song Yu1, Liu Hua2
1Jilin Technology College of Electronic Information, Jilin, 132021, China
2Calibration Centre of State Grid Heilongjiang Electric Power Company Limited, Helongjiang, 150030, China
In order to accurately, continuously detect solution pH on line, regarding C8051F020 as the control centre, the output voltage of glass electrode is amplified through high input impedance circuit utilizing potentiometric method to obtain related voltage signal of pH value. Standard solution and temperature sensor ADT7301 are utilized for system calibration and moving average filter of the detected pH values, thereby achieving real-time online detection of pH value. Detection results are accurate and reliable; low power consumption and miniaturation also facilitate rapid collection and analysis of data under different environments.