Academy & Industry Research Collaboration Center
The hydrogen ion concentration in the solution is measured as pH. The pH scale ranges from 0 to 14. A solution with pH 7 is considered as neutral and with pH 0 as highly acidic and with pH 14 is considered as highly basic. The accurate measurement and analysis of pH data is necessary for a multitude of applications ranging from agriculture sector to clinical laboratories. Preferably an inexpensive hand-held unit is needed for these applications. This paper presents the sensor data acquisition and data logging system including the details of its construction, capabilities and applications. PIC microcontroller has in-built ADC, which samples the output pH level measured by a pH meter.