Rain Bird ESP-ME3 Series Irrigation Controller – 4 to 22 Station Expandable System

The Rain Bird ESP-ME3 is a highly flexible modular irrigation controller designed to support between 4 and 22 stations, making it an adaptable solution for both residential and light commercial landscapes. Engineered for precise water management, the ESP-ME3 features advanced flow monitoring capabilities that detect broken pipes or faulty heads, providing alerts via a red LED and mobile notifications when integrated with the LNK WiFi Module. This “Smart” ready hardware is EPA WaterSense certified when paired with the LNK WiFi module and a WR2 rain sensor, enabling weather-based schedule adjustments that optimize water conservation and reduce operational costs.

Technical specifications include a large backlit LCD for enhanced visibility in low-light conditions and a non-volatile memory that permanently saves programming during power outages, while a 10-year lithium battery maintains time and date accuracy. The controller supports up to 6 start times per program and 4 independent programs (A, B, C, D) for versatile scheduling. Operational safety is ensured through a master valve/pump start circuit and an internal diagnostic system that identifies wiring short circuits. With its modular design, users can add station modules without powering down the unit, providing a scalable infrastructure that grows with the landscape. The ESP-ME3 remains a technical standard for contractors requiring a robust, easy-to-configure system that balances manual dial-based operation with advanced digital and remote connectivity features.