HRC 990 is Hydro-Rain's latest upgrade to the 900 series isolation valve controller. Feature packed and capable of opperating up to 4 valves on battery power the 990 is just a start! HRC 990 is easily converted into a "green" controller by adding its moisture sensor module or go battery free with its SOLAR power module. Whatever combination of features you decide on you'll be satisfied with HRC 990's reliabilty, ease of use, and performance.
