Suitable for all watering systems, the rain sensor avoids unnecessary wastage of water by turning the sprinklers off when it is raining. When the internal flow reaches a level of 5 mm of rain per square meter, the system shuts down. Programmed watering automatically resumes when the water in the sensor evaporates. The rain sensor should be installed in an outdoor area exposed to rain using the stainless steel bracket provided. Made in Italy.