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     What is the hardness of water?

     Water hardness is a measure of the amount of Ca2+ and Mg2+ in water. Hardness is usually expressed in terms of the equivalent quantity of calcium carbonate (CaCO3) in milligrams per litre or parts per million.

     Harm of hard water

     Hard water causes many harmful affecting human life and health. For example: In cleaning, hard water reduces the ability of foaming and washing of detergents. The fabric will rot quickly, clothes will damage, skin & hair will be dry if hard water uses for bathing and washing… In cooking, this will make the equipments, water heaters, boilers quickly deposit and damage.

     Not only that, in manufacturing industry, hard water can result in deposits of calcium carbonate, calcium sulphate and magnesium hydroxide inside pipes, boilers and turbine, causing lower water flows and making for less efficient heating. The ions in hard water can also corrode metal pipes through galvanic corrosion. Hard water uses in the process effect the quality and taste of the product.

     For these reasons, water hardness control is one of the top priority issues in manufacturing industry.

     Automatic & continuous hardness measuring device of Endress+Hauser

     Understanding the problem that customers encounter, Endress+Hauser has developed lines of specialized water quality analysis equipment, including online – automatic – continuous hardness measuring devices. This device helps customers minimize the time of sampling and analysis in the laboratory, control water resources proactively, quickly and continuously. Thereby the production process is more optimized and automated as well as early detection of troubles.

     With outstanding advantages such as:

  • Quick commissioning, friendly interface with user
  • Short response time
  • High precision
  • Low operating costs thanks to automatic calibration and cleaning, Low reagent consumption and long reagent life
  • Simple maintenance, low cost

     Water hardness analyzer Liquiline System CA80HA of Endress+Hauser meets the requirements of the most demanding customers in the world.

     In Vietnam, NK Engineering was honored to consult, install and put into operation water hardness analyzer for Nestle Tri An plant. This is some pictures of the system at Nestle’s site:

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