Salinity Sensor – PASPORT

Product Code: PS-2195


The PASPORT Salinity Sensor works with the 10X Salinity Sensor Probe to measure salinity, conductivity, and temperature. The sensor determines salinity based on electrical conductivity. The sensor has a built-in calculation to compensate for the change in conductivity due to temperature change based on the Practical Salinity Scale (PSS).

The sensor measures the electric current through a solution between the two platinized platinum electrodes in the Salinity Sensor Probe. The current through the solution is due to the movement of ions, so the higher the concentration of ions in the solution, the higher its conductivity. A voltage (AC) is applied across the two electrodes in the tip of the probe and the measured current is proportional to the conductivity of the solution.

Examples of Water Salinity

Freshwater: <0.5 ppt

Brackish water: 0.5 to 30 ppt

Saline water: 30 to 50 ppt

Ocean Water: 35 ppt

Brine: >50 ppt


  • Explore the salinity of local water sources.
  • Explore the interrelationship of salinity, temperature, and conductivity.
  • Measure the change in the salinity of saltwater as the water evaporates.


Conductivity Range 1,000 to 100,000 μS
Temperature Range 0 to 50°C
Salinity Range 1 to 55 ppt ±1% (with calibration)
Sample Rate (maximum) 50 Hz
Temperature Compensation ±0.5 ppt from 0 to 45°C at 33 ppt
Cell Constant 10X

Supporting Documents

PASPORT Salinity Sensor Manual