Air Flow / Compressed Air Flow Meters

Highly Reliable, Responsive and Affordable Air Flow Meter Solutions

To save on utility costs, maintaining an energy-efficient facility is essential, and accurate air flow and compressed air flow measurement play a crucial role in achieving this. 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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SteelMass^TM 640S

SteelMass 640S | Insertion Gas Mass Flow Meters

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

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Thermal Mass Flow Meters & Controllers for BioPharm OEMs

RedySmart^®

RedySmart | Thermal Mass Flow Meters & Mass Controllers

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

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FastFlo^™ 620S

FastFlo 620S | 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

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QuadraTherm^® 640i

QuadraTherm 640i | Thermal 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)

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FlowTrak^™

FlowTrak | Inline Flow Conditioners | Sierra Instruments

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

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Compact Mass Flow Gas Meters, Switches and Regulators

RedyCompact^®

Compact Flow Meters | Sierra Instruments

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°)

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Flow Totalizer

QuadraTherm Multi-Gas Flow Totalizers | Sierra Instruments

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

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FlatTrak^™ 780S

FlatTrak 780S | Inline Thermal Mass Flow Meters

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

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QuadraTherm<sup>®</sup> 780i Inline Mass Flow Meter.

QuadraTherm^® 780i

QuadraTherm 780i | Thermal Mass Flow Meters

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)

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TM500™

TM500 Thermal Mass Flow Meters | Sierra Instruments

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

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TM100™

TM100 Thermal Mass Flow Meters | Sierra Instruments

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