Water hardness measuring instrument AQUADUR®

AQUADUR® test strips are for the quick and easy determination of water hardness. The convenient dip & read procedure and the clear colour changes from green to red ensure reliable results within seconds. The water hardness depends mainly on the amount of calcium and magnesium salts within the water. The total sum of these salts determines the actual water hardness. In the USA, water hardness is expressed in ppm (mg/l) CaCO3. Generally, water is often simply classified as soft or hard water. By and large, the following values apply to these terms: below 50 ppm CaCO3 very soft water 50 120 ppm CaCO3 soft water 120 240 ppm CaCO3 medium hard water 240 360 ppm CaCO3 hard water above 360 ppm CaCO3 very hard water