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 records are derived from a Durafet-based sensor, custom designed and fabricated for intertidal deployment by Gernot Friederich (MBARI) for the OMEGAS project