Air Flow / Compressed Air Flow Meters

Highly Reliable, Responsive and Affordable Air Flow Meter Solutions

To save money on utility costs, running an energy-efficient facility is the key. From extremely low flows to very high flows, our immersible thermal mass flow meters, mass flow controllers, thermal mass flow sensors, and multivariable vortex mass flow meters are optimized for high-performance air / gas flow measurement. With quality flow data, you are able to manage your usage and make informed decisions. View all air flow applications see how air flow of compressed air is measured from our inventory below.

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QuadraTherm® 640i

Industry's Most Accurate Air / Gas Thermal Insertion Mass Flow Meters

  • Achieve high accuracy +/- 0.75% of reading
  • Eliminate drift with patented DrySense™ sensor
  • Validate in the field for easy in-situ calibration
  • Use qMix software to easily change gas composition in the field and retain accuracy Download Flare Gas Mass Measuring Tech Note
  • Backed by lifetime sensor warranty
  • Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD) Learn more > 
  • Part of Sierra's Big-3 iSeries family of flow meter technologies Learn more >
  • Meet EPA rule 40 CFR 63 for flare gas measurement at ultra-low flows down sfps (0.03 smps) with QuadraTherm® qMix RealTime Flare Measurement System (FMS)
SteelMassTM 640S

Insertion Gas Mass Flow Meter

  • Insertion, totalizing air/gas mass flow meter
  • Eliminate drift with patented DrySense™ sensor
  • Increase flexibility with low pressure drop, high turndown
  • Validate in the field for easy in-situ calibration
  • Backed by lifetime sensor warranty
RedySmart®

The Ultimate OEM / MFC
Lifetime No-Drift Sensor Warranty

  • Ultimate OEM MFC-modular, compact footprint, connect power cable & communication system
  • MEMS sensor stability- Lifetime no-drift sensor warranty
  • Direct mass flow with thermal technology- no temp or pressure compensation
  • Precision electromagnetic valve control
  • Competitive OEM pricing- Cost-effective solutions
FastFlo 620S

Fast-Response Insertion Thermal Mass Air Flow Sensor

  • Increase efficiency with fast response time within 200 milliseconds
  • Optimized air, nitrogen, and inert gas measurement for 1, 2, 3, 4 inch sch. 40 pipe sizes
  • Wide flow ranges from 0 to 42,000 scfh
  • Easily install in the field or retrofit
FlowTrak

Optimize Flow Profile For Best Accuracy

  • Creates uniform flow profile at economical price
  • Maximizes flow measurement accuracy in constrained piping environments
  • Reduce upstream and downstream diameters
  • Proven Dual-Plate technology
RedyCompact®

Compact Mass Flow Meters & Regulators- Perfect VA Replacement

  • Direct Mass Flow, not volumetric, for highest accuracy & repeatability
  • High-precision MEMS technology: No-drift (lifetime warranty) CMOS sensor
  • Compact Footprint for easy drop in replacement to VA meters
  • Regulate flow with high resolution manual setpoint
  • Battery operated, with large, easy-to-use touchscreen display, automatic screen adjustment (0°/90°/180°/270°)
Flow Totalizer

Four Multi-Gas Flow Totalizers for the QuadraTherm Thermal Mass Flow Meter

  • View and totalize four gases with one instrument
  • Totalize multiple gases independent of each other
  • Accurately monetize and allocate gas usage
FlatTrak 780S

Inline Thermal Mass Flow Meters with Flow Conditioning

  • Reduce straight-run requirements with built-in flow conditioning
  • Eliminate drift with DrySense sensor
  • Needs only 3-diameters up, zero downstream
  • Validate in the field for easy in-situ calibration
  • Backed by lifetime sensor warranty
QuadraTherm® 780i

Highest Air/Gas Mass Flow Measurement Accuracy in Industry

  • Achieve the highest accuracy +/- 0.5% of reading
  • Eliminate drift with DrySense 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
  • Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD), Learn more > 
  • Part of Sierra's Big-3 iSeries family of flow meter technologies, Learn more >
  • Meet EPA rule 40 CFR 63 for flare gas measurement at ultra-low flows down sfps (0.03 smps) with QuadraTherm® qMix RealTime Flare Measurement System (FMS)
TM500™

High Performance Industrial Thermal Mass Flow Meter

  • Accuracy 
    • +/- 1.0% of reading plus +/- 0.2% of full-scale – Air, Nitrogen 
    • +/- 1.5% of reading plus +/- 0.5% of full-scale – All other gases
  • Repeatability +/- 0.2% of full scale
  • Direct measurement of gas mass flow / No volume to mass calculations
  • DigiSense™ robust sensor design
  • AC or DC power 
  • Use optional Gas-Mix™ feature to easily change gas selection or create gas mixes in the field - no recal required 
  • 2-3 week delivery lead times / 1 week delivery possible
TM100™

Economical Industrial Thermal Mass Flow Meters

  • Accuracy 
    • +/- 1.0% of reading plus +/- 0.2% of full-scale – Air, Nitrogen 
    • +/- 1.5% of reading plus +/- 0.5% of full-scale – All other gases
  • Repeatability +/- 0.2% of full scale
  • Direct measurement of gas mass flow / No volume to mass calculations
  • DigiSense™ robust sensor design
  • 12 to 24 volt DC power 
  • Use optional Gas-Mix™ feature to easily change gas selection or create gas mixes in the field - no recal required  
  • 2–3-week delivery lead times / 1-week delivery possible
SmartTrak® 50

Low-Cost Digital Mass Flow Controllers & Mass Flow Meters

  • OEM pricing with digital high-performance
  • Small footprint at 50 slpm ideal for OEMs
  • 5-point NIST calibration on primary standards
  • Large display to view flow information easily
  • Choice of construction in aluminum or 316 stainless-steel
SmartTrak®100

Premium Digital Mass Flow Controllers and Mass Flow Meters

  • Direct mass flow with thermal technology +/- 0.5% full scale accuracy
  • True multi-gas digital mass flow controller
  • View and change every aspect of the instrument
  • Small footprint at 50 slpm ideal for OEMs
  • 10-point NIST calibration on primary standards

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