Hozelock 2212 Sensor Controller Water Timer Electronic Auto Watering The best time to water your garden to prevent leaf scorch and excessive evaporation is at sunrise or sunset but this is not always convenient. The Hozelock Sensor Controller range of automatic watering will take care of this for you. They include a day light sensor that automatically adjusts your daily watering schedule to start at sunrise, sunset or both. No need to programme ever again, it will automatically change the start times to coincide with sunrise and sunset as the seasons change. The Sensor Controller is easy to set up, just insert 2 x AA batteries (not supplied) and turn the dial to your preferred watering schedule. You can choose your watering schedule to be 2, 5, 10, 20, 30 or 60 minutes long. With.