Rain Bird FS350B Brass Insert Flow Sensor for 3-inch Pipes - FS350B

Rain Bird FS350B Brass Insert Flow Sensor for 3-inch Pipes - FS350B

Rain Bird FS350B is a durable brass insert flow sensor engineered for reliable flow monitoring in irrigation and industrial piping. The insert-style sensor installs into 3-inch and larger pipes and transmits precise flow data to Rain Bird controllers or standalone transmitters for accurate system monitoring and leak detection.

This FS350B unit is supplied as an insert-type sensor for 3" and larger lines and is ideal where durable brass construction and precise flow reporting are required. Consult the included Rain Bird technical documents and K-factor tables for installation details, recommended pipe selection, and calibration values. For systems with long wire runs or central-control integrations, follow the Rain Bird wiring and surge protection recommendations in the product manuals.

Features

• Solid brass construction: corrosion-resistant brass and bronze hardware designed for long service life in outdoor and underground installations.
• Insert-type design: 5.25" sleeve length and included bronze 2" NPT hex adapter allow installation into a wide range of pipe types and wall thicknesses.
• High accuracy: ±1% full-scale accuracy (model dependent) for dependable flow measurement and recording.
• Robust operating ratings: brass models tested to 400 psi and up to 220 F (105 C) for demanding irrigation and commercial applications.
• Reliable sensing: six-bladed impeller element with preamplified pulse output; two 18 AWG stranded leads (48" length) for secure electrical connection.
• Controller compatibility: works with Rain Bird ESP-LXD, ESP-LXMEF, IQ central control systems and can be used with pulse transmitters and flow monitors.
• Serviceable and calibratable: replacement inserts available (FSTINSERT) and K-factor/offset calibration data provided in Rain Bird documentation.

What our Experts Think

• Built for 3" and larger mains: Ideal for commercial irrigation systems, sports fields, and municipal water networks
• Durable brass insert construction: Engineered for long service life in underground and outdoor installations with high resistance to corrosion
• Accurate flow tracking: Six-blade impeller design delivers reliable pulse output for precise flow measurement and leak detection
• High-performance ratings: Handles demanding conditions (up to ~400 psi and high-temperature environments) suitable for professional systems
• Smart system compatibility: Integrates with Rain Bird central control platforms for advanced features like flow monitoring, leak alerts, and automated shutdowns
• Maintenance-friendly design: Insert-style sensor allows servicing or replacement without major pipe reconstruction
• Efficiency-focused irrigation control: Enables better water management through real-time flow data and system optimization

Q&A

Maintenance Tips