Dilution Solutions' Water-Powered Nutrient Delivery System Monitor Kit measures and displays the well-blended outgoing solution providing peace of mind. To complete the Hi-FLO Nutrient Delivery System, 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.