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2. Salinometer - Wikipedia

   en.wikipedia.org/wiki/Salinometer

   TDS meter – used for checking of Total Dissolved solids of a liquid. Saline (medicine) – A saline solution being isotonic with that of human blood is 0.9% w/v, c. 300 mOsm/L (and this being the same as the salinity of the ocean is a common myth. The ocean on average has a much higher concentration of sodium chloride as well as many other salts.

3. CTD (instrument) - Wikipedia

   en.wikipedia.org/wiki/CTD_(instrument)

   The instrument is lowered into the water in what is called the downcast to a determined depth or to a few meters above the ocean floor, generally at a rate of about 0.5 m/s. Most of the time a conducting wire cable is attached to the CTD frame connecting the CTD to an onboard computer, and allows instantaneous uploading and real time ...

4. Total dissolved solids - Wikipedia

   en.wikipedia.org/wiki/Total_dissolved_solids

   Conductivity based TDS meter in a cup of water. The two principal methods of measuring total dissolved solids are gravimetric analysis and conductivity. [4] Gravimetric methods are the most accurate and involve evaporating the liquid solvent and measuring the mass of residues left.

5. Electrical conductivity meter - Wikipedia

   en.wikipedia.org/wiki/Electrical_conductivity_meter

   An electrical conductivity meter (EC meter) measures the electrical conductivity in a solution. [1] It has multiple applications in research and engineering, with common usage in hydroponics , aquaculture , aquaponics , and freshwater systems to monitor the amount of nutrients, salts or impurities in the water.

6. Conductivity (electrolytic) - Wikipedia

   en.wikipedia.org/wiki/Conductivity_(electrolytic)

   [citation needed] The resistance is measured by a conductivity meter. Typical frequencies used are in the range 1–3 kHz. The dependence on the frequency is usually small, [5] but may become appreciable at very high frequencies, an effect known as the Debye–Falkenhagen effect. A wide variety of instrumentation is commercially available. [6]

7. Homeowners have nearly 40x the wealth of renters. But what's ...

   www.aol.com/homeowners-nearly-40x-wealth-renters...

   More: Fannie and Freddie will back homes costing nearly $1 million as prices surge. Still, the scope of the problem – renters have a median net worth of just $10,400 compared to about $400,000 ...