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Flexim FLUXUS G721 – Clamp on Gas Flow Meter

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Flexim FLUXUS G721 – Clamp on Gas Flow Meter

Flexim FLUXUS G721 Flow Meter


The FLUXUS® G721 Clamp On Gas Flow Meter is FLEXIM’s solution for permanent installation in nearly any gas flow metering application. Its non-intrusive measurement technology ensures a precise bi-directional, highly dynamic gas flow measurement of operational and standard volume flows.

The highly sophisticated signal filters, faster than ever processing capacities and substantially improved measurement algorithms make the FLUXUS G721 gas flow meter a state of the art measuring solution for even the most challenging gas applications.

As the transducers are mounted on the outside of the pipe wall in rugged mounting fixtures, the clamp on gas flow meter system does not suffer from wear and tear or clogging, can’t be a risk for leaks and will not cause any pressure drops inside the pipe.

Due to its matched and paired transducers as well as the internal temperature compensation (compliant to ANSI/ASME) the measurement system is drift free and zero stable ensuring accurate readings. Moreover, as the transducer calibration data is automatically loaded by connecting the transducer to the transmitter, set-up times are reduced and precise, long-term stable results are provided.

The G704 clamp on gas flow meter can be applied at inner pipe diameters ranging from 7mm up to 1600mm (no limitations on pipe wall thickness or material) and media temperatures from -40°C up to 200°C. Moreover, the measurement system is independent of the pressure inside the pipe.

With up to two measurement channels, the FLUXUS G721 clamp on gas flow meter can also be applied to difficult measurement points and is completely unaffected by gas density, viscosity and composition as well as dust and humidity. Even wet gas up to Liquid Volume Fractions of 5% can be measured.

Further, with its wide range of electrical inputs and outputs, the G721 clamp on gas flow meter can handle a variety of process parameters within gas flow metering applications.

The FLUXUS G704 clamp on gas flow meter is also available in an IECEX Zone 2 approved version, allowing its usage in the respective hazardous areas. FLEXIM also offers gas flow meters for usage in IECEX Zone 1 environments, such as the FLUXUS G800 and FLUXUS G801 (for Offshore usage).


  • Oil & Gas
  • Chemical
  • Petrochemical
  • Power Generation
  • Energy Management (compressed air)


  • Clamps onto the outside of the pipe – no need to cut into the pipe to install the meter making it highly cost effective in comparison to wetted instrumentation
  • No process interruptions
  • Capable of outputting data every 10ms
  • Reliable measurements of wet gas
  • High operational safety with no risk of leaks
  • Maintenance free – no need for continuous work in hazardous areas
  • Matched transducers with integrated temperature compensation
  • Permanent coupling with unique couplant pads, suitable for vibrating pipes
  • Simple to use with reliable results
  • Bi-directional communication
  • The ideal noninvasive measuring device
  • A wide range of communications available allowing complete monitoring of processes as well as supervision and control of critical operations

Technical details:

  • Please download data sheet for more technical information