WeatherTRAK WTPRO3-C-30-CWM ET Pro3 30 Station Controller Wall Mount. WeatherTRAK ET Pro3® is the hands-down most tested and proven commercial-grade smart irrigation controller on the market today. This proven controller is EPA WaterSense certified and passed the Irrigation Association’s Smart Water Application Technologies (SWAT) protocol with a perfect score. The ET Pro3 can control a single site or an entire portfolio of sites using conventional wire technology or advanced 2-wire technology.