Resistivity R1, R2, R3 – Resistivity quantifies how strongly a sample of seawater opposes the flow of electric current. The Hydrothermal Vent Fluid Temperature and Resistivity sensor uses three input voltages (1, 5, and 25 volts), to scale the output to between 0-4 Volts. The measured resistance values are recorded as R1, R2 and R3 respectively. The most highly-resolved, on-scale resistivity data value is used to convert from conductivity (1/Resistivity) to chloride concentration.
The following instrument classes include this data product: