Estimate the total dissolved solids (TDS) by Conductivity measurement (CAT#: STEM-PPA-0019-WXH)

Conductivity (EC) and total dissolved solids (TDS) are water quality parameters, which are used to describe salinity level. These two parameters are correlated and usually expressed by a simple equation: TDS = k EC (in 25 0C). The process of obtaining TDS from water sample is more complex than that of EC.

• Treatment of Water Quality
• Concentration measurements and control
• Helpful in analyzing Carbon dioxide and Sulphuric dioxide in water

1. Use a conductivity standard solution (usually potassium chloride or sodium chloride) to calibrate the meter for the range that you will be measuring.
2. Rinse the probe with distilled or deionized water.
3. Select the appropriate range beginning with the highest range and working down. Read the conductivity of the water sample. If the reading is in the lower 10 percent of the range, switch to the next lower range. If the conductivity of the sample ex ceeds the range of the instrument, you may dilute the sample. Be sure to perform the dilution according to the manufacturer's directions because the dilution might not have a simple linear relationship to the conductivity.
4. Rinse the probe with distilled or deionized water and repeat step 3 until finished.

Conductivity Meters