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Chapter 373.62, Florida Statutes, reads:

Water conservation; automatic sprinkler systems. – Any person who purchases and installs an automatic lawn sprinkler system after the effective date of this act (May 9, 1991) shall install, and must maintain and operate, a rain sensor device or switch that will override the irrigation cycle of the sprinkler system when adequate rainfall has occurred.

                      *Key Words or phrases:

Automatic lawn sprinkler system – This rule applies to automatic sprinkler systems for homes, schools, government buildings and commercial/industrial sites that are irrigating turf grass.  It does not apply to golf courses or sod farms or nurseries.

Rain sensor device or switch – a low voltage electrical component placed in the circuitry which is designed to turn off a sprinkler controller when it rains enough to meet the needs of the landscape.  There are two types:

1. A soil moisture sensor – Senses the moisture content of the soil via probes inserted into the root zone.
2. A rain switch – Measures the rainfall via a cup similar to a small evaporative pan or via a wick which expands and in turn switches off the sprinkler system.       

When adequate rainfall has occurred – The amount of supplemental irrigation required beyond the rainfall will vary depending on the type of turf grown, the type of soil, and the climatic condition specific to the area.  Professional irrigation suppliers, Agricultural extension offices, IFAS, and District Water Use staff in Resources Management can help individuals determine how much supplemental irrigation their turf grass and shrubs need and how to set their rain sensor or switch accordingly.

• Costs – a rain switch cost about $25-$50, plus the cost of installation.   The cost of a soil moisture sensor ranges from $60 - $400.
• Availability – Soil moisture sensors are available through professional irrigation contractors.  Rain switches are sold through professional irrigation suppliers and at retail hardware stores like Ace, Scotty’s, Home Depot’s, etc.
• Enforcement – Water Management Districts, state, county and City officials, sheriffs and police officers.