The Hunter Flow-Sync HFS is an insertion-style flow sensor that measures real-time irrigation flow and triggers controller responses to high or low flow conditions. Designed for professional and residential irrigation systems, it delivers station-level monitoring to help prevent water waste caused by leaks or line breaks. Compatible with Hunter ACC, ACC2 and I‑Core controllers; also compatible with ICD‑SEN sensor decoders and ICC2 via Centralus modules for system-level monitoring. Fits pipe sizes up to 4 inches; requires an FCT tee (sold separately) for pipe installation. Sensor is precalibrated for K-factor and offset by FCT size for quick setup. Simple two-wire connection (black and red leads) to S1/S2 sensor terminals; supports cable runs up to 1,000 ft (≈300 m) from the controller or decoder. Durable, waterproof construction with O‑ring seals and removable plug for winterization. Impeller-based metering provides reliable flow readings and totalizers. Monitors station-level flow and provides automatic reaction to high or low flow conditions, helping protect landscapes from flooding and erosion. When used with a master valve the HFS can stop irrigation during major line breaks and significantly reduce water waste. Refer to the Hunter Flow-Sync owner’s manual and product cutsheet for complete specifications, flow ranges by pipe size, operating limits and installation instructions. The HFS is a proven, water-saving accessory for new or existing Hunter systems.
