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Front view of Irritrol RS500 wired rain sensor mounted on a gutter bracket, showing white UV-resistant 25 ft cable and bracket.

Irritrol RS500 Wired Rain Sensor with 25 ft UV-Resistant Cable

Brand: Irritrol
Save 27%
$54.71
$39.67
SKU RS500

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The Irritrol RS500 Wired Rain Sensor stops scheduled irrigation when rainfall is detected, helping conserve water and protect landscapes. Its compact, durable housing and simple two-wire connection make installation quick. The sensor's reliable mechanical design minimizes false triggers and requires little maintenance once mounted.

  • Industry-standard hygroscopic discs detect rainfall and trigger the controller to halt watering.
  • Adjustable rainfall sensitivity (3–25 mm / 1/8–3/4 in) lets you set the activation threshold for your site.
  • Vent ring dry-out adjustment controls how long irrigation stays suspended after rain, from quick reset to extended delay.
  • Includes 25 ft (7.5 m) UV-resistant white-jacketed cable; cable can be extended up to 100 ft using 18 AWG outdoor-rated wire for flexible placement.
  • Works with normally open or normally closed sensor circuits and is compatible with most AC-powered controllers and timers.
  • UV-resistant engineered polymer housing with gutter clip, surface-mount screws, and conduit adapter for multiple mounting options; UL-listed for dependable outdoor service.

Documents: Sell Sheet and User Guide are available for download. Mount the RS500 clear of sprinkler spray with similar sun exposure as the landscape. Periodically clean the discs and check wiring; follow the included manual for wiring and configuration. Irritrol provides a multi-year limited warranty—refer to product literature for details.

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Frequently Asked Questions

What controllers is the RS500 compatible with?
Designed to work with most AC-powered irrigation controllers; supports normally open or normally closed sensor circuits.
How do I adjust the rain sensitivity and dry-out delay?
Use the Rainfall Adjustment Cap for threshold (3–25 mm / 1/8–3/4 in) and the vent ring to set the dry-out/reset rate.
Can I extend the RS500 cable if needed?
Yes. The supplied 25 ft cable can be extended up to 100 ft using 18 AWG outdoor-rated wire; seal and secure all connections.

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