QuadraTherm 640i/780i Thermal Mass Flow Meter

Cart 0

Sierra QuadraTherm 640i/780i Thermal Mass Flow Meter

Enquiry Item

High Accuracy Industrial Thermal Mass Flow Meter

You need air flow measurement instruments that provide wide turndown ratio, very low pressure drop, no moving parts, application flexibility and a direct gas mass flow rate measurement. The inline QuadraTherm® 780i is the most accurate thermal mass flow meter for air 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.



  • Accuracy: +/-0.5% of Reading above 50% of FS*
  • Fluid: All inert gases, flammables and corrosives
  • Flow range: 0-60,000sfpm (305 smps)
  • 100:1 Turndown
  • Built-in flow conditioning minimizes upstream pipe runs
  • Multivariable: Mass flow rate, temperature & pressure
  • Revolutionary QuadraTherm® four-sensor design
  • DrySense™ no-drift sensor with lifetime warranty
  • qtherm® living, learning "Brain" manages all inputs
  • Dial-A-Pipe™: Change pipe size
  • Dial-A-Gas™: Change gas type
  • qThermGas Library: 18 gases & mixtures (growing & improving)
  • ValidCal™ Diagnostics: Assure performance
  • Smart Interface Program: Computer interface software
  • Foundation Fieldbus, Profibus DP, HART (pending)
  • CE, cFMus, ATEX, IECEx approved

Verified by an independent NIST & NVLAP accredited lab


Write a review

Note: HTML is not translated!
    Bad           Good