LYCOS RETRIEVER 
Conductivity
built 816 days ago
Conductivity is a measure of the ability of water to pass an electrical current. Conductivity in water is affected by the presence of inorganic dissolved solids such as chloride, nitrate, sulfate, and phosphate anions (ions that carry a negative charge) or sodium, magnesium, calcium, iron, and aluminum cations (ions that carry a positive charge). Organic compounds like oil, phenol, alcohol, and sugar do not conduct electrical current very well and therefore have a low conductivity when in water. Conductivity is ... affected by temperature: the warmer the water, the higher the conductivity. For this reason, conductivity is reported as conductivity at 25 degrees Celsius (25 C).
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Conductivity research at Stim-Lab is on-going through a consortium for "The Investigation of the Effects of Fracturing Fluids on the Conductivity of Proppants." Consortium members participate in studies that examine proppant conductivity in downhole conditions, proppant flowback and fracturing fluid leakoff. Membership in the consortium is available on a yearly basis.
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The Model 4200 Premier Portable Conductivity Meter measures between 0 and 199.9mS, covered by five automatically switched ranges using a single cell. In-built software is able to calculate and report results as Total Dissolved Solids in mg/l, Salinity in g/l or Resistivity in MOhms. A "pure water" mode enacts the non-linear temperature coefficient characteristics associated with low conductivity water.
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Conductivity is useful as a general measure of stream water quality. Each stream tends to have a relatively constant range of conductivity that, once established, can be used as a baseline for comparison with regular conductivity measurements. Significant changes in conductivity could then be an indicator that a discharge or some other source of pollution has entered a stream.
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Conductivity is widely used as a measure of electrolyte concentration. In a binary solution (one electrolyte, water), conductivity is directly proportional to concentration. Each electrolyte possesses a unique conductivity curve. Strong electrolytes (e.g. hydrochloric acid) dissociate fully in water, giving higher conductivity values than weak electrolytes, like acetic acid.
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Pick out the Conductivity or TDS probe that is right for the application. All cells feature built-in temperature compensation and are housed in a lightweight removable probe guard. Choose from three different cell constants. Replacement electrodes for portable Testers are available.
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Conductivity