Rain Bird® A61200 RSD-BEx RSD Series Wired Rain Sensor. The Rain Bird® RSD Series Rain Sensor automatically shuts off your sprinkler system when it rains, so you don't have to worry when you're home or away. The RSD Series Rain Sensor easily connects to most irrigation system controllers. RSD Series Rain Sensors offers flexible, multiple rainfall settings which are quick and easy to adjust with a twist of the dial.