Rain Bird FG100 1-Inch Wired Flow Sensor — 3 GPM to 35 GPM, ESP-ME3 & LNK2 Compatible

The Rain Bird FG100 1-Inch is a compact wired flow sensor designed for irrigation systems to detect leaks, track flow and integrate with Rain Bird controls and mobile monitoring. It instantly identifies broken lines or heads to help prevent water waste and property damage. Flo-Watch™ integration pairs with the ESP-ME3 Controller to learn normal flow patterns and alert on unusual conditions. For remote access and system checks, the FG100 connects to the Rain Bird Mobile App when used with the LNK2 module. Installation is flexible — no straight run of pipe is required and the unit can be installed directly after the master valve. Standard 18-gauge irrigation wire is compatible, so no specialty cable is necessary. Constructed with a plastic body, the sensor uses a paddle wheel impeller and a ceramic shaft to aid heat dissipation. Connection options include 1" NPT, BSP, or slip unions to suit different plumbing setups. Performance specs: operates from 3 GPM to 35 GPM with a recommended maximum of 25 GPM. The FG100 is winter-ready and built to withstand high-pressure blowouts without needing seasonal removal. Physical dimensions are 9.25" (L) × 3.31" (H) × 2.56" (W).