Rain Bird FS150B 1.5 in Brass Tee Flow Sensor - FS150B
Rain Bird FS150B is a 1.5 in brass tee flow sensor designed for commercial irrigation systems. It sends pulse flow data to controllers and transmitters for precise monitoring, leak detection, and system diagnostics.
Includes comprehensive technical documentation and installation guides. Ideal for commercial and institutional landscapes where reliable flow monitoring and rapid leak detection are critical.
Features
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Durable brass tee: robust metal construction for high-pressure irrigation applications.
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Pulse output: provides pulse output compatible with PT3002, PT322 transmitters and Rain Bird central controllers.
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Suggested flow range: 4–80 gallons per minute (approx. 15–300 L/min) for best accuracy.
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High tolerance: metal models rated for high pressure (up to 400 psi) and elevated temperatures.
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Easy integration: available with NPT or BSP ends and installs in-line in a tee fitting.
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Dimensions: approximately 6.5 x 5.19 x 2.5 inches.
What our Experts Think
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Commercial-grade flow monitoring: The Rain Bird FS150B 1.5" Brass Tee Flow Sensor is designed for accurate flow measurement in medium-capacity irrigation systems where reliability and system protection matter.
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Precise pulse output sensing: Uses a six-bladed impeller to generate pulse signals for irrigation controllers, enabling flow tracking, leak detection, and system diagnostics.
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Strong measurement accuracy: Typically delivers around ±1% full-scale accuracy when installed within the recommended flow range, ensuring dependable hydraulic data.
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Durable brass tee construction: Heavy-duty brass body supports underground installation and high-pressure operation (up to ~400 psi in metal models), making it suitable for demanding environments.
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Optimized operating range: Best performance typically in the mid-flow range (commonly ~4–80 GPM depending on system design), ensuring stable readings for multi-zone irrigation.
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Smart irrigation integration: Works with Rain Bird central control and ESP-LX series controllers for advanced features like FloWatch leak detection, Learned Flow, and FloManager optimization.
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System protection advantage: Helps automatically detect abnormal flow conditions (broken lines, stuck valves) and can trigger shutdown to prevent water loss and landscape damage.
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Professional installation requirement: Requires correct pipe sizing, straight-run installation, and compatible pulse transmitter/controller setup for accurate performance.
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Trade-off reality: Overkill for small residential systems—best suited for commercial landscapes, estates, and multi-zone automated irrigation networks.
Q&A
Maintenance Tips
- 1.5-inch brass tee inline flow sensor for commercial irrigation monitoring
- Uses a six-blade impeller design for stable, accurate flow measurement
- Provides approximately ±1% full-scale accuracy for reliable system readings
- Designed for outdoor or underground installation in irrigation mainlines
- Heavy-duty brass construction rated for high-pressure systems (up to ~400 psi)
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Pulse output signal compatible with Rain Bird controllers and transmitters (PT322, PT3002)
- Supports advanced irrigation functions like leak detection, flow monitoring, and automatic shutdown
- Typical operating range around 4–80 GPM (application-dependent for best accuracy)
- Compatible with central control systems (ESP-LXD, ESP-LXMEF, IQ platforms)
- Used in commercial landscapes, sports fields, and large irrigation networks
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