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The Flexim FLUXUS G731 represents a significant advancement in non-intrusive ultrasonic flow measurement for gases, offering both volumetric and mass flow data with exceptional precision. Designed for industrial applications, this clamp-on flow meter features cutting-edge signal filtering, rapid data processing, and refined algorithms that set a new benchmark in gas flow monitoring.

Equipped with Synchronized Channel Averaging (SCA) and flow profile correction, the G731 is built to perform reliably in even the most demanding operational environments. Its advanced Dynamic Gas Meter functionality calculates real-time gas properties, ensuring accurate and adaptable measurements regardless of gas composition or flow conditions.

Engineered for performance, the FLUXUS G731 delivers robust, maintenance-free measurement without pipeline intrusion—ideal for industries seeking accurate gas flow data without process disruption.

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 Winterization Enclosure Datasheet
FLEXIM Winterization Enclosure Datasheet
FLEXIM Start-Up Service Prerequisites Brochure
FLEXIM Start-Up Service Prerequisites Brochure
FLEXIM Rental Process
FLEXIM Rental Process
Flow Measurement Services
Flow Measurement Services
Flexim FLUXUS G731 Non-intrusive Ultrasonic Gas Flow Measurement

Specs

Fluid type
All gases
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 to 2 % of reading ±0,005 m/s (±0.02 ft/s)
Flow Channels
up to 2
Range
Flow Velocity Range: 0,01 to 35 m/s (0.03 to 115 ft/s), depending on pipe diameter
Certifications/Approvals
FM Class I /Div 2
ATEX/IECEx Zone 2
Power supply
90-264VAC
11-32VDC
Pipe size
7 to 1600 mm (0.28 to 63 inch)
Pressure range
-
Temperature range (media)
-40 to +240°C ('-40 to +464°F) / WI: -200 to +630°C (-328 to +1166°F)
Output
4-20mA active/passive
4-20mA HART® active/passive
pulse/frequency/binary
Input
Temperature
4-20mA active/passive
Communication Protocol
Modbus RTU/TCP
BACnet MSTP/IP
Profibus PA
FOUNDATION Fieldbus
M-Bus

Features

  • Accuracy and repeatability - exceptional reliability and accuracy at high and low flows due to matched, calibrated and temperature compensated transducers, advanced signal processing capabilities and diagnostics.
  • Easy installation without process interruptions - an externally mounted system means no need for process interruptions or additional engineering costs.
  • Maintenance-free - no contact with flowing media results in a completely maintenance- free and durable metering solution to withstand even the harshest environments.
  • Operational safety - no leak paths, no fugitive emissions.
  • Advanced Meter Verification
  • Dynamic Gas Meter for calculation of gas properties like density and molar mass
  • Integrated Wet Gas Correction
  • Certified for operation within hazardous areas (FMc Class I Division 2, ATEX/IECEx Zone 2)
  • Every measurement system is pre-calibrated in-house (traceable to national standards) and delivered with a calibration certificate.
  • Matched transducers, integrated temperature compensation (according to ANSI/ASME MFC-5.1-2011 regulations) and digital signal processing guarantee a high zero-point stability and drift-free measurement readings.
  • ISO 24062 compliant
  • Flow disturbance correction to reduce required straight runs down to 2D inlet
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