Fluidra Rain sensor RSD-BEX with aluminum latching bracket & 25' extension wire — weatherproof, adjustable sensitivity

The Fluidra Rain Bird RSD-BEX is a weatherproof rain sensor that automatically pauses 24VAC irrigation systems when rainfall reaches your chosen level, helping save water and protect your landscape.

The RSD-BEX combines a compact, UV-resistant housing with adjustable sensitivity and drying-time control to give homeowners and maintenance teams a simple way to prevent unnecessary watering after precipitation. It mounts on a sturdy aluminum latching bracket and includes 25 feet of UV-resistant extension wire for straightforward integration with Rain Bird 24VAC controllers and pump start relays. Built to be durable and easy to set up, this sensor uses hygroscopic discs to detect moisture and offers multiple shutoff thresholds to match local rainfall patterns.

How do I set the sensor to stop sprinklers at the right rainfall amount?

Adjusting the shutoff threshold is done with the twist dial on the sensor. Choose a setting between light drizzle and heavy rain so your system only pauses when you want it to.

• Dial range from 1/8" to 3/4" of rainfall.
• Click-stops make repeatable selections easy.
• Suitable for zones with different irrigation needs.

How does the adjustable vent ring affect drying and resetting?

The vent ring controls how quickly the sensor’s hygroscopic discs dry after rain, determining how soon irrigation can resume. Slower drying prevents short interruptions from light mist, while faster drying restores watering sooner in dry climates.

• Vent ring increases or reduces airflow over discs.
• Customizable drying time to match local humidity.
• Helps avoid false resets from evaporation or brief showers.

What makes the RSD-BEX durable and easy to install?

Its body is molded from high-grade, UV-resistant polymer to resist sun and weathering, and it rides on a rugged 5-inch aluminum latching bracket for secure mounting. The unit ships with 25 feet of 20 AWG two-conductor extension wire to simplify routing back to the controller.

• UV-resistant polymer enclosure for long outdoor life.
• Aluminum latching bracket provides sturdy, corrosion-resistant mounting.
• 25' of UV-resistant extension wire for flexible installation routing.

Will this work with my existing irrigation controller and valves?

The RSD-BEX is designed for compatibility with 24VAC Rain Bird residential and commercial controllers and pump start relays. It can switch multiple 24VAC solenoid valves per station while handling a master valve if needed.

• Specifically compatible with Rain Bird 24VAC controller electronics.
• Capable of switching up to ten 24VAC, 7VA solenoid valves per station plus one master valve.
• UL and cUL listed, CE approved for safety and compliance.

Who is this for: The Fluidra Rain Bird RSD-BEX suits homeowners, landscapers, and property managers who want a low-maintenance, adjustable rain shutoff for 24VAC irrigation systems. It’s ideal when you need reliable rainfall detection, simple sensitivity and drying-time control, rugged mounting hardware, and enough wire length for flexible placement near controllers or pump relays.