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Rain Sensors#



When installed correctly, rain sensors automatically shut off your automatic sprinkler system when it rains. When the sensor dries, the sprinkler controller resumes regular operation.

  • Conserves water -- prevents watering during and after rain events (until sensor dries)
  • Saves money
  • Less watering means less water you have pay for on your utility bill
  • A sensor reduces wear on the irrigation system because the system runs only when nature isn't doing the watering for you
  • Helps protect rivers and other bodies of water by reducing runoff and deep percolation that can carry pollutants, such as oils and fertilizers, into storm drains and groundwater


  • A rain sensor should be mounted where it will be exposed to unobstructed rainfall.
  • In the event of extensive or heavy rainfall; use the rain delay function or turn off controller — the rain sensor won't know how much rain fell and as soon as it dries it will resume your regular watering schedule. If a lot of rain fell, you don't need to water for at least a few extra days.
  • How to install on newer controllers, a discussion of common problems and how to assure the device is working correctly: video
  • How to install on older controller models: video

Save even more money. Rebates on eligible rain sensors are available to Utilities water customers.

Did You Know?

Watering in the early morning or late evening when there's less wind reduces water loss.

Small leaks and drips add up. Don't drip and drive.

Closing crawl space vents and covering the crawl space floor with at least 6 millimeters of plastic can reduce soil moisture.