The TrolMaster DFM-1 is a 1-inch (2.54 cm) digital inline flow meter designed for the Aqua-X Pro (NFS-2) irrigation control system. It continuously measures water or nutrient-solution flow through the main feed line and sends real-time flow data to the NFS-2. When integrated with Aqua-X Pro, it enables volume-based irrigation, allowing an irrigation event to deliver a programmed quantity of solution rather than simply running for a fixed amount of time. The built-in LCD also lets staff verify flow directly at the meter.
• SKU: DFM-1
• Brand: TrolMaster
• Pipe Connection Size: 1" (2.54 cm)
• Thread Type: NPT tapered
• Included Adapters: 2× 1" NPT tapered thread adapters
• Meter Type: Digital inline flow meter
• Measurement: Real-time water or nutrient-solution flow
• Display: Built-in LCD with on-site, real-time flow readout
• Compatible Controller: TrolMaster Aqua-X Pro NFS-2
• Volume-Based Irrigation: Yes — enables Feed by Volume with NFS-2
• Installation: Inline on the main irrigation/feed line
• Power Requirement: TrolMaster SPH-1 sensor power hub required
• Operating Temperature: 32–122°F (0–50°C)
• Operating Humidity: ≤90% RH
• Package Dimensions: 160 × 85 × 90 mm
• Original Aqua-X NFS-1: Not compatible
• Future Functionality: Sensor architecture supports potential future leak-detection and line-blockage functions; these were not available at launch
• Larger-Line Alternatives: DFM-2 for 1.25" lines and DFM-3 for 1.5" lines
Key Advantage: The DFM-1 allows Aqua-X Pro to control irrigation based on the actual volume delivered, rather than assuming a fixed flow rate for a given valve-open time. This can improve repeatability when pump pressure, line conditions, or flow rates vary between irrigation events.