Conductivity standards

Standard solutions for calibrating conductivity meters and for determining the values of total dissolved solids (TDS meters). If you require accurate and reproducible results from your conductometer, then calibration using pre-prepared standard solutions is necessary. Potassium Chloride (KCl) is the most popular calibration solution because it is soluble and stable. The composition of the conductivity standard solutions is the KCl: Water ratio. Always use fresh solution and carry out the procedure in a plastic container, as the use of metal containers may affect calibration. Available solutions for calibrating conductivity and TDS meters are ready to use. Hach Lange offers certified NaCl and KCl standard solutions in various concentrations. Below are the most popular calibration solutions for conductivity and TDS meters:

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Application area

Beverages 9 Brewing 12 Drinking water 24 Food production 4 Laboratory analysis 35 Pharmaceuticals 1 Process control 6 Treatment facilities 6 Wastewater 24

Type

Conductivity Standard Solution 40 Laboratory 2

Industry

Pulp and paper 10 Power generation 10 Chemical 11 Municipal 33 Transport 10 Food and Beverage 24 Ecology 11 Glass 10 Pharmaceutical 13

Brand name

Hach 30 Hanna Instruments 9 Mettler Toledo 11 WTW 1

Parameters

Conductivity 49 Electrical conductivity 2 TDS (Total Dissolved Solids) 4 pH 1

Measurement Range

1.3 µS/cm 1 5 µS/cm 1 10 µS/cm 1 12.85 mS/cm 1 12.88 mS/cm 7 25 µS/cm 1 46.7 µS/cm 1 84 µS/cm 3 100 µS/cm 1 111.3 mS/cm 1 146.9 µS/cm 2 147 μS/cm 3 180 µS/cm 1 445 µS/cm 1 500 µS/cm 1 1000 μS/cm 1 1015 µS/cm 1 1408 µS/cm 1 1412 µS/cm 1 1413 µS/cm 11 1417 µS/cm 1 1990 µS/cm 1 3960 µS/cm 1 5000 µS/cm 1 10000 µS/cm 1 12880 µS/cm 1 12890 µS/cm 1 18000 µS/cm 1 pH 7.01 1

Measurement Range (2)

30 ppm TDS 1 300 ppm TDS 1 1000 ppm TDS 1 3000 ppm TDS 1