Instrument: pH Sensor
An instrument that measures the hydrogen ion activity in solutions.
The overall concentration of hydrogen ions is inversely related to its pH. The pH scale ranges from 0 to 14 and indicates whether acidic (more H+) or basic (less H+).
pH Sensor: Orion 3-stars, Thermo Scientific, USA, mounted with a combination pH probe (Orion Ross Ultra, Thermo Scientific, USA).