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Measuring Natural Gas More Efficiently

The more accurate your natural gas measurements, the more money you will save in natural gas costs and run an efficient facility. Our wide range of natural gas flow meters increase efficiency in boiler/burner control, fuel-to-air ratio, and custody transfer applications.  View more natural gas flow applications.

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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 >
qMix™ Gas Mixing Feature

Field-Update For Gas Composition Changes

  • Powerful, gas mixing software to create custom gas mixtures in the field
  • Per meter license gives unlimited custom gas mixtures and uploads per meter serial number
  • Maintain flow meter accuracy if gas composition changes
  • No need to send unit back to the factory if gas composition changes
  • Avoid costly recalibration
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® 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 >
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
MultiTrak 670S

Multi-Point Gas Mass Flow Meters for Large Ducts and Stacks

  • Compensates for flow profile changes with up to 4 sensor points
  • Exceeds in applications with non-uniform flow profiles, low pressure drop, high turndown
  • Eliminate drift with patented DrySense™ sensor
  • Manage multiple inputs with easy-to-use touchscreen HMI display interface
  • Backed by lifetime sensor warranty
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
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
BoilerTrak 620S-BT

Insertion Thermal Mass Flow Meter for Boiler & Heater Efficiency

  • Optimized natural and propane 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
  • Certified for GHG measurement meeting EPA (40 CFR Part 98)
  • Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD) Learn More
  • Fast delivery—ships next-day from stock 
OEM Probe Only Thermal Sensors

Custom Packaged Thermal Mass Flow Sensors

  • Mass flow sensor probes to fit your OEM needs
  • Wide flow range from 0 to 20,000 sfpm
  • Increase flexibility with low pressure drop
  • Turndown: 1000:1 
  • Patented DrySense™ sensor
  • Backed by lifetime sensor warranty
InnovaMass® 240S Inline

Vortex Flow Meters

  • Highly reliable with no moving parts
  • Flexibility with volumetric or multivariable versions
  • No leaks with all welded gasket-free flow body
  • Loop power option available
InnovaMass® 241S Insertion

Vortex Flow Meters

  • Insertion probe for pipes and ducts up to 72 inches (2M); Optional hot tap
  • Highly reliable with no moving parts
  • Loop power option available
  • Rugged, long-lasting design for the industrial applications
  • For fast delivery, buy online, next-day shipment
SmartTrak® 100 HP

Ultra-High Pressure Gas Mass Flow Meters & Controllers

  • Powerful high-pressure measurement and control up to 5000 psig (345 barg)
  • Proven accurate mass flow control with high-pressure calibration facility
  • Guaranteed high-pressure performance with high-impact, carbon-enforced valve seat
  • Make adjustments in the field with pushbutton display
  • Flexible Integration with a wide range of digital communication protocols
MaxTrak® 180

Industrial Mass Flow Controller

  • Meet industrial MFC requirements  with NEMA 6 & IP67 ratings
  • Increase efficiency with true, digital high-performance
  • Make adjustments in the field for time savings
  • Configure up to 10 gasses with one instrument
InnovaMass® 240i Inline

iSeries Next Generation Vortex Flow Meters

  • Pipe sizes from 1.0 to 8.0 inches (DN25 to DN200)
  • Ideal for saturated or superheated steam, gas, and liquid applications
  • Mass and/or volumetric flow rate
  • Multivariable for five (5) measurements in one compact device
  • Latest iSeries Raptor II™ OS flow engine
  • Complete suite of digital communications
  • Certified for Boiler MACT measurement meeting EPA regulations 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 >
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
InnovaMass® 241i Insertion

iSeries Next Generation Vortex Flow Meters

  • Insertion probe up to 72 inches (2M); optional hot tap
  • Ideal for saturated or superheated steam, gas, and liquid 
  • Volumetric flow rate or mass flow 
  • Multivariable for five measurements in one device
  • Complete suite of digital communications
  • A variety of Apps for ultimate field flexibility
  • Buy online for next day shipping
  • Certified for Boiler MACT measurement meeting EPA regulations 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 >

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