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Gas Mass Flow Solutions

All gas mass flow products, one place.

Sierra designs and manufactures a wide range of today’s most advanced analog and digital flow meters, mass flow meters, controllers, switches, calibrators and flow profile conditioners.  Each gas flow meter meets exacting standards and can be customized to meet your gas flow meter application requirements (often free of charge).

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SmartTrak® 50

Economical Digital Mass Flow Meters & Controllers

  • Powerful digital high-performance at OEM pricing
  • Navigate easily with large display interface
  • Primary standard NIST gas flow calibration
  • Easy drop-in replacement with compact size
  • For fast delivery, buy online, next-day shipment
SmartTrak® 100

Premium Digital Mass Flow Meters & Controllers

  • Our highest performance multi-gas MFC
  • Navigate easily with large multifunction display interface
  • Primary standard NIST gas flow calibration
  • Make adjustments in the field for time savings
  • For fast delivery, buy online, next-day shipment
Compod™ Upgrade

Make Your Digital MFC Network Enabled And Much Much More!

  • Upgrade new or existing SmartTrak 100 MFCs
  • Monitor MFC functionality, faults and system upsets
  • User programmable control module
  • Daisy-chain multiple devices
  • Make simple process control systems, no PLC's
MicroTrak® 101

Ultra Low Flow Gas Mass Flow Meters & Controllers

  • Measure and control mass flow rates down to 0.1 sccm (smlm)
  • Improve efficiency with true, digital high-performance
  • Primary standard NIST gas flow calibration
  • Navigate easily with large multifunction display interface
  • 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 performance with high-impact, carbon-enforced valve seat
  • Make adjustments in the field to save time
  • Flexible Integration with a wide range of digital communication protocols
SmartTrak® 140

Ultra-Low Pressure Drop Mass Flow Controller

  • Ultra-low pressure with ΔP of 4.5 psid (310 mBard) @ 500 slpm
  • Primary standard NIST gas flow calibration
  • Navigate easily with large multifunction display interface
  • Make adjustments in the field for time savings
  • Configure up to 10 gasses with one instrument
MaxTrak® 180

Industrial Mass Flow Controller

  • NEMA 6 & IP67 ratings
  • Digital MFC to meet industrial environmental requirements
  • No need for expensive secondary enclosures
  • Primary standard NIST gas flow calibration
  • Make adjustments in the field for time savings
  • Configure up to 10 gasses with one instrument
MassTrak® 810

Economical Nylon Mass Flow Controllers

  • Economical Nylon Mass Flow Controllers
  • Control gas mass flow rate at affordable OEM pricing
  • Save money with volume discounts
  • Read results easily  with large tiltable display
  • Precision control with low pressure drop
  • Easy to use on-board set point control
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
qMix™ Gas Mixing Feature

Field-Update For Gas Composition Changes

  • Powerful, gas mixing software to create custom gas mixtures in the field
  • Free BETA trial with every QuadraTherm® thermal mass flow meter
  • Maintain flow meter accuracy if gas composition changes
  • No need to send unit back to the factory if gas composition changes
  • Avoid costly recalibration
SmartVO™

Precision Gas Flow Control Valves

  • Proprietary frictionless-hovering direct-acting control
  • Operate over a wide pressure differential range
  • Many choices of fitting and elastomers
  • Valve designed with positive shut off
  • Aluminum and 316L stainless steel
  • For fast delivery, buy online, next-day shipment
SideTrak® 840

Analog Mass Flow Controller

  • Analog Mass Flow Controller to accurately measure gas flow rate
  • Cleanable capillary sensor tube
  • Precision control with low pressure drop
  • Proven to control toxics, corrosives, combustibles and dirty gases
  • Count on durability with rugged construction
QuadraTherm® 640i

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

  • Insertion, totalizing air / gas mass flow meter
  • Achieve high accuracy +/- 0.75% of reading
  • Change gas and pipe size in the field
  • Build your own gas composition with qMix™
  • Eliminate drift with patented DrySense™ sensor
  • 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
  • Measure low flow to 100 sccm, high flow to 60,000 scfm
  • Change gas & composition in the field with qMix™
  • Eliminate drift with patented DrySense™ sensor
  • Validate in the field for easy in-situ calibration
  • Backed by lifetime sensor warranty
SteelMass 640S

Accurate Air/Gas Metering of Peak, Low Flow and Total Mass Flow Rate

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

  • Inline, totalizing gas mass flow meter
  • For natural gas, methane and propane measurement
  • Increase flexibility with low pressure drop, 100:1 turndown
  • Validate in the field for easy in-situ calibration
  • Certified for GHG measurement meeting EPA (40 CFR Part 98)
  • For fast delivery, buy online, next-day shipment
FastFlo 620S

Fast-Response Insertion Thermal Mass Air Flow Sensor

  • Increase efficiency with fast response time within 200 milliseconds
  • Optimized for air, nitrogen, and inert gas measurement
  • Wide flow range from 0 to 20,000 sfpm, 100:1 turndown
  • Easily install in the field or retrofit
  • For fast delivery, buy online, next -day shipment
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
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
ChlorineTrak 760S

Cost-Effective Chlorine Gas Mass Flow Meters Made From Kynar

  • Inline, totalizing gas mass flow meter for chlorine
  • Cost-effective solution for chlorine injection market
  • Offers corrosion-resistant Kynar® flow body at economical price
  • Rugged Hastelloy® sensor
  • Increase flexibility with low pressure drop, high turndown
  • Validate in the field for easy in-situ calibration
MultiTrak 670S Multi-Point System

Accurate Air / Gas Metering For Non-Uniform Flow Profiles in Large Pipes

  • Multiple point insertion, totalizing gas mass flow meter
  • Each sensor removes independently
  • Low pressure drop, high turndown
  • Eliminate drift with patented DrySense™ sensor
  • Validate in the field for easy in-situ calibration
  • 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
  • A variety of Apps for ideal field flexibility
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
FlowTrak Flow Conditioners

Optimize Flow Profile For Best Accuracy

  • Reduce upstream and downstream diameters
  • Creates uniform flow profile to maximize accuracy
  • Reduce upstream piping diameters to less than three
  • Use upstream of any gas flow meter
  • Low pressure drop
  • Can be used in very large diameter pipes
InnovaSwitch Flow Switch

Flow Switch for Precision Detection of Liquid / Gas Flows

  • Ultra-sensitive with fast response time
  • Ideal for industrial pump protection
  • 2-year workmanship warranty
  • Unique high temperature to 850°F (454°C)
  • For fast delivery, buy online, next-day shipment
InnovaSwitch Level Switch

Level Switch for Precision Detection of Liquid Level

  • Triggered on level change of 0.03 inch (0.8 mm)
  • Fast response time of 0.5 seconds
  • Ideal for tank leak detection
  • Great for truck and railcar loading
  • 2-year workmanship warranty
  • For fast delivery, buy online, next-day shipment
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
CalTrak®500

Accurate Gas Flow Calibration Primary Standard

  • Primary standard gas flow calibrator directly traceable to NIST
  • Accuracy of +/- 0.35% of reading gas mass flow rate
  • Calibrate your flow instruments, save money and time
  • Quick, easy-to-use, automatic data capture 
  • Portable and battery operated
CalTrak®800

Highest Accuracy Gas Flow Calibration Primary Standard

  • Primary standard gas flow calibrator directly traceable to NIST
  • Highest accuracy of +/- 0.15% of reading gas mass flow rate
  • Broad flow range from 0.5 sccm up to 100 slpm
  • Quick, easy to use, automatic data capture 
  • Portable and battery operated
CalTrak®XL

Primary Standard High-Flow Gas Flow Calibration

  • Primary standard flow results directly traceable to NIST
  • Bring +/- 0.15% of reading accuracy to the factory floor
  • Begin to calibrate up to 1500 slpm
  • Replace bell provers or sonic nozzle arrays
  • Quick, easy to use, automatic data capture 

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