Weathermatic Sensors

Most rain sensors trigger after about 1/8 inch to 1/2 inch of rainfall, depending on how the sensor is adjusted. For standard landscapes, a 1/4-inch setting is a common starting point because it helps prevent watering after mild rainfall without shutting the system down for a light mist or drizzle. With most Weathermatic sensors, you can adjust the settings based on your local climate.

A Weathermatic rain or freeze sensor should be mounted where it isn’t blocked by trees or other obstructions. For many models, Weathermatic recommends mounting near a roofline or gutter, with the sensor exposed to the elements and kept vertical. Wireless models like the RFS5 should also be placed as close to the controller as possible for a good connection.