Product Summary
The PASPORT Salinity Sensor works with the 10X Salinity Sensor Probe to measure the salinity, conductivity, and temperature of fresh to brackish water sources. The sensor determines salinity based on electrical conductivity. It also features a built-in calculation, based on the Practical Salinity Scale (PSS), that compensates for changes in conductivity caused by temperature changes.
The Salinity Sensor measures the electric current through a solution between the two 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
Fresh water: <0.5 ppt
Brackish water: 0.5 to 30 ppt
Saline water: 30 to 50 ppt
Ocean Water: 35 ppt
Brine: >50 ppt
Applications
- 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.
How It Works
Examples of Water Salinity:
Fresh water: < 0.5 ppt
Brackish water: 0.5 to 30 ppt
Saline water: 30 to 50 ppt
Ocean water: 35 ppt
Brine: >50 ppt
Product Specifications
| Conductivity Range | 1,000 to 100,000 µS/cm |
| Temperature Range | 0 to 50°C |
| Salinity Range | 1 to 55 ppt ±1% (with calibration) |
| Maximum Sample Rate | 50 Hz |
| Temperature Compensation | ±0.5 ppt from 0 to 45°C at 33 ppt |
| Cell Constant | 10X |
Data Collection Software
This product requires PASCO software for data collection and analysis. We recommend the following option(s). For more information on which is right for your classroom, see our Software Comparison: SPARKvue vs. Capstone »
Interface Required
This product requires a PASCO Interface to connect to your computer or device. We recommend the following option(s). For a breakdown of features, capabilities, and additional options, see our Interface Comparison Guide »
Dedicated Datalogging with SPARK LXi2
Consider an all-in-one, touchscreen data collection, graphing, and analysis tool for students. Designed for use with wired and wireless sensors, the SPARK LXi2 Datalogger simultaneously accommodates up to five wireless sensors and includes two ports for blue PASPORT sensors. It features an interactive, icon-based user interface within a shock-absorbing case and arrives packaged with SPARKvue, MatchGraph!, and Spectrometry software for interactive data collection and analysis. It can additionally connect via Bluetooth to the following interfaces: AirLink, SPARKlink Air, and 550 Universal Interface.
