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Shop an extensive inventory of factory direct flow meters and controllers available for sale online from Sierra Instruments. We offer a large selection of in-stock mass flow meters and controllers, immersible thermal mass flow meters, vortex flow meters, flow switches, and ultrasonic flow meters for any gas, liquid or steam application. Custom configure your flow meter online or get fast, next-day shipping delivery on in-stock products.

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SmartTrak®100

Mass Flow Controller (Model 100)

  • 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
SmartTrak®100

Mass Flow Meter (Model 100)

  • 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
SmartTrak® 50

Mass Flow Controllers Economical (Model 50)

  • 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 construction in aluminum or 316 stainless-steel
SmartTrak® 50

Mass Flow Meters Economical (Model 50)

  • 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 construction in aluminum or 316 stainless-steel
TopTrak® 820

Economical Analog Mass Flow Meter

  • 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 Nylon Mass Flow Controller

  • 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 local setpoint control
InnovaSonic®203

Economical Ultrasonic Mass Flow Meter

  • High performance at an affordable price
  • Simply clamp-on outside of pipe for easy set up
  • Save time with no pipe cutting or process shutdown
  • For fast delivery, buy online, next-day shipment
  • Flexible rent or Rent-2-Own programs
InnovaSonic®210

Portable Ultrasonic Mass Flow Meter

  • Easy setup in five minutes or less
  • Portable clamp-on transducers measure liquid flows nearly anywhere
  • Save time with no pipe cutting or process shutdown
  • For fast delivery, buy online, next-day shipment
  • Rent or Rent-2-Own programs
  • Boiler MACT certified for area source boilers (40 CFR 63, subpart JJJJJJ) and for major source boilers (40 CFR 63, subpart DDDDD) Learn More
QuadraTherm® 640i

Insertion Thermal Mass Flow Meter

  • 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 >?
InnovaMass® 241i Insertion

InnovaMass iSeries 241i

  • 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 >
InnovaMass® 241S Insertion

Insertion Multivariable Vortex Mass Flow Meter

  • 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
FastFlo 620S

Insertion Thermal Mass Flow Meter

  • 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
BoilerTrak 620S-BT

Insertion Thermal Mass Flow Meter

  • 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 
InnovaSwitch Flow Switch

Thermal Flow Switch for Gases and Liquids

  • Ultra-sensitive with fast response time
  • Ideal for industrial pump protection
  • Buy online, next-day shipment
  • 2-year workmanship warranty
  • Unique high temperature up to +458°C
InnovaSwitch Level Switch

Thermal Level Switch for Liquids

  • Triggered on level change of 0.8 mm
  • Ideal for tank leak detection
  • Great for truck and railcar loading
  • Buy online, next-day shipment
  • 2-year workmanship warranty
FloBox951/954

Single & Multi-Chanel Digital Control Power Supplies

  • Digitize up to four analog mass flow controllers
  • Add feature-packed digital performance to analog MFCs
  • Easy-to-use large pushbutton digital display
  • Conveniently power up to four units
  • Independent totalizers and alarms
  • For fast delivery, buy online, next-day shipment

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