Irritrol has been making irrigation control components for decades, and the RS1000 Wireless Rain Sensor solves a simple problem: your sprinklers shouldn’t run when it’s raining. This sensor mounts outside, wirelessly communicates with your existing Irritrol controller, and automatically shuts off watering after it detects a half-inch of rainfall. It also monitors for freezing temperatures and prevents irrigation when it drops below 37°F—saving your plants from ice damage.

The unit measures 1.5 x 3.75 x 1.75 inches and weighs just over nine ounces, so it’s small enough to tuck under an eave or mount on a fence post. The wireless range covers up to 800 feet, which is plenty for most residential lots. Setup takes about ten minutes: mount the sensor, pair it with the receiver, and connect the receiver to your controller’s sensor terminals. No wiring between the sensor and the house is required.

Battery life is rated at one season with standard AA batteries, and the sensor uses a mechanical disc that expands when wet and contracts as it dries. This means no electronic moisture sensing—just reliable, passive detection. The only real limitation is that it won’t work with non-Irritrol controllers without an adapter, so check compatibility before buying. For anyone with an Irritrol system, this is a straightforward upgrade that stops wasting water.