Automatic sprinkler system controllers are programmed to go on and off on a certain day and at a certain time. The controller does not know if it is sunny and dry outside or raining. For this reason every lawn sprinkler system should have a rain sensor.
The rain sensor determines whether or not enough rainfall has occurred in order to skip an irrigation cycle. There are three basic types of rain sensors. They all serve the same purpose: keeping your system from over-watering the turf or your garden. How does it do that? The electrical connection between the sensor and your sprinkler system controller is interrupted when a certain ...MORE
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