Wireless salinity sensor

The CMA wireless salinity sensor measures the salinity of a solution within the range of 0 to 50 ppt.
The sensor is equipped with a color OLED display that shows sensor information and measured values. This makes the sensor suitable as a standalone measuring instrument.

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.

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.

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