Camlab 1138890 AQUADUR Water Hardness Test Strips, Gradation: <3 >5 >10 >15 >20 >25 °dH, 6mm x 95mm (Pack of 100)

• 【Total hardness】- The total hardness can be measured from < 54 > 90 > 180 > 270 > 360 > 450ppm CaCO3
• 【Convenient】- The convenient dip & read procedure and clear colour change, from green to red, ensures reliable results
• 【Rapid】- Test results can be seen within seconds of the test strip being placed into the water sample
• 【Colour change】- The colour change observed on the test stick is from green to red depending on the water hardness
• 【Shelf life】- These test strips have a shelf life of 2 years when kept under the right storage conditions - storage temperature 4-30oC

Product Description Aquadur are test-strips for the determination of water hardness. Clear colour changes from green to red ensure an accurate readout within seconds. Individually sealed AQUADUR test strips can perfectly be combined with promotion activities to inform customers about the necessity of water softeners. Instructions for use are printed on the seal. Due to the clear design with green/red indication, a colour chart is not necessary. The hardness of water depends on its content of calcium and magnesium salts. The total assay of these salts determines the hardness of water, which can be expressed in terms of ppm (mg/l). Water can be classified as 'soft water' or 'hard water' depending on the concentration of the salts: below 50ppm CaCO3 - very soft water. 50-120ppm CaCO3 - soft water. 120-240ppm CaCO3 - medium hard water. 240-360ppm CaCO3 - hard water. Above 360ppm CaCO3 - very hard water. These test strips are semi-quantitative test strips for the quick and easy determination of water hardness. Directions Dip the test strip into the water sample, wait for the color to change, and then read the result within seconds.