Dilution Solutions' Water-Powered NDS Monitor Kit measures and displays the well-blended outgoing solution providing peace of mind. To complete the Hi-FLO NDS, you will also need Dosatron Injectors, the Standard Starter Kit, Mixing Chamber Kit(s), and the Water Hammer Arrestor Kit. This part is also available without the monitor – please call 1-800-451-6628 or CHAT with us for details.