HM Digital’s single, in-line SM-1 TDS monitor is designed to monitor the effectiveness of any water purification and filtration system that removes TDS. Battery operated and easily installed, the unit has a range of 0-9,990 ppm with an accuracy rate of +/- two percent. Users simply turn the unit on to view TDS levels of the product water to determine system performance and when filter cartridges or membranes need to be serviced. http://email@example.com
HM Digital Inc.