M2 Bubbly Flow Analyzer Optical probe-based technique for accurate measurements of bubble size, bubble velocity and void fraction in dense flows M2 optical probe system suits a wide variety of applications, from fundamental research to industrial R&D and process control Key characteristics • The probe can be operated in the heart of dense flows, thanks to a miniaturized sensing part • High-pressure chemical reactor • No transparency or optical access required • Efficient optical micro-technology applicable to turbulent flows • Geophysics (wave flume, stepped spillway) • Nuclear & automotive cooling systems • Waste water treatment • A broad range of sizes and velocities covered all at once enables direct and easy measurement in polydisperse flows • Mixing process • Eye-safe equipment • Fundamental studies M2 requires only minutes for getting up and running

Performances & specifications Performances & specifications • Bubble diameter: from 250 µm to ∞ (one single range) • Bubble velocity: 0.5 cm/s - 80 m/s (one single range) • Void fraction: 0 - 100 %. • Void fraction uncertainty: better than 5 % • Velocity and size uncertainty: better than 10 % • Measurements independent of bubble shape • Tolerance between the probe and the flow direction: 30° • Standard operating temperature: 60°C – option: 150°C or 250°C • Standard operating pressure: 8 bar – option: 100 bar • External trigger available in option • Laser safety: Class 1 laser product M2 can also...