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How Rain Sensors Work

Rain sensors use moisture-sensitive discs or electronic sensors to detect rainfall and simultaneously stop your irrigation system. When a rain detector senses a certain amount of moisture, it triggers a switch that pauses your irrigation system. Then, after a set amount of time or when moisture is no longer detected, your sprinklers can resume watering. Most sensors even allow you to adjust the rainfall threshold, telling the sensor how much rain should fall before it stops irrigation.

Rain Sensor FAQs

What are the benefits of using a rain sensor?

One of the key benefits of installing a rainfall sensor is that it saves water. If your plants get water from the rain, another round of water from your sprinklers will be unnecessary. Furthermore, an irrigation rain sensor will also prevent your plants from getting root rot due to overwatering.

Do rain sensors work with irrigation controllers?

Yes, rain sensors absolutely work with irrigation controllers. In fact, they’re designed to integrate directly with controllers to make your watering system smarter and more efficient. When an electronic rain gauge is connected to your irrigation controller, it can interrupt watering schedules when rain is detected.

Where are rain sensors installed?

Typically, a rainfall sensor is mounted on a roof, fence, gutter, or in any open area where rain falls directly. It’s important for them to be located in an unobstructed area where they can accurately detect rainfall. Also, make sure that your sensor is close enough to connect with the irrigation controller, so that you can connect them with a wire.