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TFS-300 - Toro 3" Flow Sensor

Toro TFS-300 3" Flow Sensor — Plastic Tee, 20–300 GPM

Brand: Toro
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$1,053.27
$803.12
SKU TFS-300

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The Toro TFS-300 is a 3" flow sensor pre-installed in a PVC plastic tee for irrigation systems. It provides a frequency (pulse per second) output proportional to flow, enabling accurate monitoring and fast detection of leaks or pipe breaks.

  • Operating range: 20–300 GPM suggested for best performance; sensor can measure outside this range.
  • Output: 2-wire unscaled pulse (pulse width ≈5 ms ±25%); frequency 3.2–200 Hz suitable for most controllers.
  • Materials: 3" Schedule 80 PVC tee; potted PPS sensor housing; glass-filled nylon impeller; tungsten-carbide shaft; UHMWPE bearings.
  • Compatibility: Works with Toro TMC-424, TIS‑360/480, Sentinel, SitePro and any controller accepting frequency output.
  • Installation: Socket-end tee; allow 10 pipe diameters upstream and 5 downstream for accurate readings; removable sensor for easy replacement.
  • Ratings: Pressure rating up to 100 psi (for 1½"–4" sizes), temperature up to 140°F, and a two-year limited warranty.

Designed for below-grade or valve-box installation, the TFS-300 combines durable materials and precise measurement for residential and light-commercial irrigation. See product brochures and installation guide for wiring diagrams, K-values, and detailed specifications.

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Frequently Asked Questions

What is the operating flow range for the TFS-300?
Suggested operating range is 20–300 GPM; the sensor can operate outside this range but performs best within it.
Which controllers is the TFS-300 compatible with?
Compatible with Toro controllers (TMC-424, TIS‑360/480, Sentinel, SitePro) and any controller accepting frequency (pulse) output.
How is the TFS-300 wired to a controller?
Provides a two-wire frequency (pulse) output. Red is (+) signal, black is (−); use direct-burial 18 AWG irrigation wire and waterproof connections.
What materials and warranty does the TFS-300 include?
3" Schedule 80 PVC tee, potted PPS sensor, glass-filled nylon impeller, tungsten-carbide shaft, UHMWPE bearings; two-year limited warranty.