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QuadraTherm 780i Thermal Mass Flow Meter by Sierra Instruments

QuadraTherm 780i Thermal mass flow meter by Sierra Instruments

Highest Air / Gas Flow Meter Measurement in Industry

Sierra Instrument's QuadraTherm® 780i is the most accurate inline thermal mass flow meter for air/gas flow rate measurement on the market today, achieving gas mass flow rate accuracy never before possible, +/- 0.5% of reading above 50% of full scale. The QuadraTherm 780i rivals accuracies of Coriolis technology for measuring gas mass flow rate with a breakthrough  thermal dispersion technology achieving “percent of reading” accuracy.

  • Achieve the highest accuracy +/- 0.5% of reading
  • Eliminate drift with DrySenseTM sensor
  • Reduce straight-run requirements with built-in flow conditioning
  • Needs only 1-diameter up and zero downstream diameters
  • Validate in the field for easy in-situ calibration
  • Backed by lifetime sensor warranty
  • High flows up to 60,000 scfm (305 smps)
  • Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD),
  • Part of Sierra's Big-3 iSeries family of flow meter technologies

Change Gas Mixtures in the Field-No Recalibration Needed 

Each QuadraTherm thermal flow meter from Sierra Instruments comes with on board qMix(tm) gas mixing software which allows you to create custom gas mixtures in the field to compensate for gas compositional changes, meaning no costly recalibration is needed. This means it is perfect for managing changes in flare gas composition in the field for upstream oil & gas flare gas measuring applications and other applications in which gas composition fequently changes.


QuadraTherm 780i Flow Meter suitable applications

  • Natural Gas Flow Measurement Instruments
  • Precision Measurement & Control
  • Digital Flowmeters & Controllers
  • Gas Mixing & Blending
  • Waste Water Treatment
  • Flare Gas Management


780i Thermal Mass Flow Meter benefits

  • Patented DrySenseTM velocity sensor / "quad" 4-sensor thermal sensor technology 
  • Life time warranty on sensor
  • No moving parts
  • Low pressure drop
  • Ability to change pipe size and gas in the field
  • ValidCal™ Diagnostics: field calibration validation and meter diagnostics to assure operating performance
  • Large LCD display


QuadraTherm 780i Thermal Mass Flow Meter Document Downloads

DOWNLOAD PDF  for the QuadraTherm 780i


Thermal Mass Flow Meter Technology


Flow Type: Gas Flow Meters