The DFM-3 is a 1.5" digital inline flow meter provides accurate measurements of water or a nutrient solution flowing through a fluid pipe. It is specially designed for the Aqua-X Pro system. When it’s used with the Aqua-X Pro, users can set the irrigation schedule to be controlled “By volume”, and the DFM-3 will measure and allow the desired and precise amount of nutrient solution to be used. The DFM-3 sensor can also be used for future functions and may include the ability to sense water leaks and / or line blockages. Need to be powered by SPH-1