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High-Performance Flowmeters

Mass Flowmeters Improve Quality with Precision Measurement

Sierra designs and manufactures a wide range of gas flowmeters across three core technologies: capillary thermal, immersible thermal. Our vortex flow meter give precision multivariable and volumetric measurement for gas, liquid, and steam.   From R&D to semicon to flow energy management in large facilities, Sierra’s mass flowmeters are perfect across a variety of applications. 

Why Compromise?

For research and general industry, our SmartTrak line of gas flow meters and gas flow controllers (MFCs) offers the largest breadth of products with more value. SmartTrak is often called the “Swiss Army Knife” of MFCs. SmartTrak mass flowmeters and controllers:

  • Allow you to choose a single unit 0-50 slpm or any flow in between
  • Offer the smallest footprint, just 1”(25mm) wide, 3”(75mm) long
  • Allow you to specify any gas, any flow range
  • Give you to customize your list of gases custom list of any gas
  • Include the ability to measure even corrosive, toxic and reactive gases
  • Have the lowest pressure drop in industry of 4.5 psid (310 mBard) @ 500 slpm
  • Can measure high pressure gases to 5000psi (345barg)

If you want to calibrate and maintain SmartTrak yourself, Sierra will set you up with DIY calibration at a nominal cost.

Maximize Efficiency with Immersible Thermal

With more than 20,000 units sold, our thermal mass gas flow meter provide customers with the highest accuracy, quality and performance to maximize your productivity and cut energy costs. Our QuadraTherm 640i/780i is the most accurate thermal mass gas flow meter for air / gas mass 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.

Increase Productivity & Reduce Cost-of-Ownership with Vortex Flow Meters

Vortex is the ideal flow technology for gas, liquid and steam measurement.  Sierra's InnovaMass vortex flow meter can be specified to measure up to five process variables with one process connection: volumetric flow, mass flow, density, pressure, and temperature.  With this multivariable capability, it's easier to maximize your steam productivity and reduce cost-of-ownership.

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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
MicroTrak® 101

Ultra Low-Flow Gas Mass Flow Meters & Controllers

  • Measure and control flow rates down to 0.1 sccm (smlm)
  • Increase efficiency with true, digital high-performance
  • Navigate easily with large multifunction display interface
  • Make adjustments in the field for time savings
  • Configure up to 10 gasses with one instrument
TopTrak® 820

Ecomonical 800 Series Mass Flow Meters

  • Proven gas flow measurement with affordable OEM pricing
  • For fast delivery, buy online, next-day shipment
  • Save money with volume discounts
  • Read results easily with large tiltable display
  • Easy drop-in replacement with compact size
  • Available in economical nylon, stainless steel and aluminum
MassTrak® 810

Economical Digital Mass Flow Controllers

  • Record flow measurement at affordable OEM pricing
  • Save money with volume discounts
  • Read results easily  with large LCD readout
  • Accurate mass flow control even with low pressure drop
  • Save time with built-in setpoint control
SmartTrak® 50

Economical Digital Mass Flow Controllers & Mass Flow Meters

  • OEM pricing with digital high-performance
  • Small footprint at 50 slpm ideal for OEMs
  • 10-point NIST calibration on primary standards
  • Large display to view flow information easily
  • Choice of aluminum or 316 stainless-steel construction
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
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
SteelMass 640S

Accurate Metering of Peak, Low Flow and Total Mass Flow Rate

  • 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
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
  • Fast delivery—ships next-day from stock
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 >
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 
FlatTrak 780S-UHP

Industry-Choice For Bulk High Purity Gas Custody Transfer To Semicon Fabs

  • Optimized for bulk ultra high purity (UHP) gas custody transfer
  • Direct mass flow measurement
  • No moving parts, 100:1 turndown, low pressure drop
  • Reduce straight-run requirements with built-in flow conditioning
  • Validate in the field for easy in-situ calibration
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
ChlorineTrak 760S

Cost-Effective Chlorine Gas Mass Flow Meters Made From Kynar

  • Cost-effective solution for chlorine injection market
  • Offers corrosion-resistant Kynar flow body at economical price
  • Rugged, no drift DrySense Hastelloy sensor
  • Validate in the field
  • Backed by lifetime sensor warranty
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
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 >
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® 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 >
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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