Development and Characterization of a pH and Conductivity Measurement System for Water Quality Assessment

Abstract – This work reports the implementation and characterization of a measurement system for water quality assessment. The measured quantities are pH, conductivity and temperature. Sensor characterization and the interdependence of the different quantities are analyzed. For pH and temperature commercial sensors were used and only signal conditioning interfaces were developed. For conductivity measurements it was designed and implemented a new conductivity cell. Dedicated software, LabVIEW and Maxwell SV-2D, was used as a tool to study some specific details of the cell behavior. From this work arises the possibility to use the conductivity cell to identify different types of salts based on the interdependence between conductivity and capacitance measurements