ªØ´·´Êͺ¤Ø³ÀÒ¾¹éÓ Test Strip Paper > Water Hardness Tester à¤Ã×èͧÇÑ´¤ÇÒÁ¡ÃдéÒ§¢Í§¹éÓ > à¤Ã×èͧÇÑ´¤ÇÒÁ¡ÃдéÒ§¢Í§¹éÓ Water Hardness Tester 480008 Total Hardness Test Paper kit ªèǧÇÑ´¤èÒ¤ÇÒÁ¡ÃдéÒ§ 0 - 1000 ppm (mg/l) ÇÑ´ä´é 50 ¤ÃÑé§ 480008 Total Hardness Test Paper kit ¡ÃдÒÉÇÑ´¤ÇÒÁ¡ÃдéÒ§¢Í§¹éÓ ªØ´·´Êͺ¤ÇÒÁ¡ÃдéÒ§ ¢Í§¹éÓ > ªèǧÇÑ´¤èÒ¤ÇÒÁ¡ÃдéÒ§ 0 - 1000 ppm (mg/l) ÇÑ´ä´é 50 ¤ÃÑé§ Calcium and Magnesium are naturally occurring minerals responsible for water hardness. Hardness is a key water chemistry parameter and its control is important to help assure proper water quality. Low levels of calcium and magnesium (soft water) can contribute to problems of corrosive water. High calcium and magnesium levels, especially above 400 ppm, can lead to possible water clarity problems and scaling. There are various commercially-available softeners that can help minimize the problems associated with high hardness levels. Hardness levels can be determined by using a simple dip and readstrip. Levels are standardized as Calcium This product uses no harmful chemicals, requires no drop counting or lengthy mixing procedures, and does not require the person performing testing to have any sort of advanced technical expertise. Detection Range in Parts per Million: 0, 40, 80, 120, 180, 250, 425, 1000 ppm (mg/L) Detection Range in Grains per Gallon: 0, 2, 5, 7, 11, 15, 25, 58 gpg 480008 Hardness ITS Test Paper Total Hardness ¡ÃдÒÉÇÑ´ ¡ÃдÒÉÇÑ´¤ÇÒÁ¡ÃдéÒ§ ªØ´·´Êͺ