It can be frustrating to see your automatic sprinkler system watering the yard when it is raining and the ground is saturated. Melnor s AquaSentry coupled with the Melnor Raincloud Smart Watering System will prevent this from happening in your yard. This amazing device senses the moisture level in your soil and only allows the Raincloud to water when the soil is dry... If the soil is already wet enough it tells Raincloud to skip the watering cycle which saves water and is better for your plants. This is better than a simple rain sensor because it senses the actual soil moisture to ensure that the rain has soaked in before skipping the watering cycle. The handy dial on the AquaSentry allows you to set the moisture level where the device tells Raincloud to stop watering because your vegetables may require more water than your shrubbery.