Water Hardness

Water hardness describes the amount of cations of alkaline earth metals dissolved in water, which are mainly calcium and magnesium cations. Simply put, water is harder the more (poorly soluble) calcium and magnesium compounds it contains.

The best-known effects of hard water are limescale deposits on faucets and tiles, or the calcification of coffee or washing machines. In addition, hard water during washing can reduce the cleaning effect of the detergent and cause clothes to turn gray. Water hardness is also important when watering plants, as many plants are sensitive to hard water.

The Apera Instruments YD300 is specifically designed for fast and accurate measurement of water hardness (concentration of Ca2+ and Mg2+) and is equipped with the proprietary601-S electrode. It enables convenient and user-friendly measurement of water hardness, which can be expressed in 8 different units.