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The FLUXUS F731 WD from Flexim offers a highly effective, non-invasive solution for flow monitoring in both potable water and wastewater systems. This ultrasonic flow meter allows for quick, economical clamp-on installation, eliminating the need for pipe modification in existing water infrastructure.

Engineered for precision and reliability, the F731 WD excels in measuring extremely low flow velocities—as low as 0.01 m/s (0.03 ft/s)—making it especially well-suited for leak detection and nighttime flow analysis. With permanently mounted transducers and robust IP68 protection, the system is ideal for use in harsh environments, including flooded areas and underground installations.

Building upon the capabilities of the F532 WD, the F731 WD supports pipe diameters exceeding 2000 mm (79 in) and features dual-channel measurement along with a wide range of communication interfaces, offering enhanced flexibility for complex monitoring needs.

Ultrasonic Clamp-On Flow Meter Rentals

Connect with our Team at Spartan Controls for a conversation about your flow application. Our team of flow experts will help you discover the optimal solution for your flow measurement needs. 

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Flexim FLUXUS F731 WD Stationary Ultrasonic Water Flow Meter

Specs

Fluid type
Water
Accuracy
Measurement uncertainty of the measuring system (volumetric flow rate): ±0.3 % of reading ±0,005 m/s (±0.02 ft/s)
Measurement uncertainty at the measuring point (volumetric flow rate): ±1 % of reading ±0,005 m/s (±0.02 ft/s)
Repeatability
0.15 % of reading ±0,005 m/s (±0.02 ft/s)
Flow Channels
up to 2
Range
Flow Velocity Range: 0,01 to 25 m/s (0.03 to 82 ft/s), depending on pipe diameter
Certifications/Approvals
-
Power supply
90-264VAC
11-32VDC
Pressure range
-
Temperature range (media)
-40 to +240°C ('-40 to +464°F)
Output
4-20mA active/passive
4-20mA HART® active/passive
pulse/frequency/binary
Input
4-20mA active/passive
Communication Protocol
Modbus RTU/TCP
BACnet MSTP/IP
Profibus PA
FOUNDATION Fieldbus
M-Bus

Features

  • Extremely accurate down to flow velocities as low as 0.01 m/s (0.03 ft/s).
  • No zero-calibration needed and permanently drift-free.
  • Permanent coupling foil.
  • IP68 transducers.
  • Transducers can be permanently buried (no chamber required).
  • Reliable and accurate flow measurement.
  • Low installation costs.
  • Built to last.
  • Works on challenging pipe material like, for example, PCCP and cement.
  • Advanced Meter Verification.
  • ISO 24062 compliant.
  • Flow disturbance correction to reduce required straight runs down to 2D inlet.