Description
The sensor can be used wirelessly via Bluetooth or wired via USB with the Coach 7 or Coach 7 lite programs/apps on computers (Windows and Mac), Chromebooks and mobile devices (Android and iOS).
The salinity sensor consists of a salinity electrode and an amplifier.
Salinity is the measure of all the salts dissolved in water. Salinity is often expressed as parts per thousand (ppt), which is approximately equal to grams of salt per liter of solution. The average ocean salinity is 35 ppt and the average river water salinity is 0.5 ppt or less.
Technical specifications:
- Measuring range: 0 .. 50 ppt
- Resolution: 0.1 ppt
- Warrantee: 36 months
- Automatic temperature compensation between 5°C and 35°C
- OLED display: 0.96” 128 x 64px
- Maximal sampling rate: 5 Hz
- Battery life: 6h when fully charged (rechargeable)
- Connection: Bluetooth 5, Low Energy (Mac, Android, iOS) Bluetooth 2.1, Classic (Windows) or USB-C 2.0
All specifications of the sensor are described it its Product manual, see downloads.
Suggested chemistry and biology experiments:
- Measure how temperature changes affect salinity readings of a fixed solution
- Mix freshwater and seawater in different ratios and measure the resulting salinity
- Observe salinity increase as water evaporates from a saline solution
- Compare salinity of local water sources like tap water, river, and seawater
- Gradually dissolve salt in distilled water and record salinity changes
- Osmosis experiments
- Monitor the rate of reaction in a chemical reaction in which dissolved salt-ions and solution conductivity varies with time due to an ionic specie being consumed or produced
