Process Monitoring & Control System

  • WHP2-Block-T Commercial, Saih Shuaib 3, Dubai.
  • +971 54 247 4633
  • contact@owato.ae

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Ph/Conductivity/Resistivity

pH is a measure of how acidic/basic water is. The range goes from 0 - 14, with 7 being neutral. pHs of less than 7 indicate acidity, whereas a pH of greater than 7 indicates a base. pH is really a measure of the relative amount of free hydrogen and hydroxyl ions in the water. Water that has more free hydrogen ions is acidic, whereas water that has more free hydroxyl ions is basic. Since pH can be affected by chemicals in the water, pH is an important indicator of water that is changing chemically. pH is reported in "logarithmic units". Each number represents a 10-fold change in the acidity/basicness of the water. Water with a pH of five is ten times more acidic than water having a pH of six.

The conductivity of a solution is a measure of its ability to conduct electricity, sound, and transmit heat. The units of conductivity of water are Siemens per meter in SI and milliohms per centimetre in CGS. The symbol of conductivity of water is k or s. Pure water is not a great conductor of electricity rather it acts as an insulator. The conductivity of water enhances if its ion concentration increases. Distilled water in equilibrium with carbon dioxide in the air can conduct electricity. The electrical conductivity of water is a measure of the ionic activity of a solution that can transmit current.

The conductivity of water is very important in industrial applications such as cooling towers and boilers. The conductivity of water can actually give the idea of how much chemicals, minerals and dissolved substances are present in the water and this is the reason conductivity of water is important in industrial applications. If the number of chemicals, minerals and dissolved substances are high then there is a chance to have a high conductivity of water.

Resistivity in water is the measure of the ability of water to resist an electrical current, which is directly related to the amount of dissolved salt in the water. Water with a high concentration of dissolved salts will have a low resistivity, and vice versa. Resistivity is measured in Ohms.