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Product Selection Tools & More...
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Welcome to Sierra!
Sierra is one of the most trusted manufacturers of high performance flow meters and controllers today. By combining product quality and delivery with a global network of flow experts spread across 47 countries, our goal is to consistently deliver the best flow measurement solution for each customer and support your product over its entire life.

Our Thermal Mass, Transit-Time Ultrasonic, and Multiparameter Mass Vortex instruments are available in both standard and customized versions for applications in research, quality control, OEM systems, industrial process control and hazardous environments.  From the factory floor to the laboratory, Sierra’s flow measurement technologies precisely measure or control very low flows of gas down to less than 1 sccm full scale as well as extremely high flows of gas, liquid, and steam.  With rugged product design, cutting-edge innovation, and a worldwide team of flow experts, experience why customers around the globe rely on Sierra.  If you want to learn more about us, visit the Sierra Chronicles to read a sampling of interesting flow solutions stories.


Choose Your Fluid:
Fluid Type: We offer solutions for Gas, Liquid and Steam flow measurement and control. Get a tutorial on our product lines along with selection charts.
(Select your fluid type below)
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Gas (All, including mixtures, toxics and corrosives)   •  Liquid (All)   •  Steam (Saturated & Superheated)


Choose Your Product Type & Technology (List): 
We manufacture Thermal Mass (capillary tube and immersible probe), Transit-Time Ultrasonic and Multiparameter Mass Vortex instruments.
(Select from the list below to view product selection tools)

Fluid
Product Type & Tech
Selection Charts & Tools
Request a quote
Mass Flow Controllers:
Premium Digital / Traditional Analog / Economical
(MFC’s) with intergal valve, Thermal Capillary Tube
Mass Flow Meters:
Premium Digital / Traditional Analog / Economical / Fast Response
(MFM’s) Thermal Capillary Tube
Industrial Thermal Mass Flow Meters:
Heavy-Industrial / Light-Industrial
(Immersible Probe)
Flow & Level Switches:
View ALL Industrial flow switch products
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Model BG-3 Partial Flow Sampling Systems:
Go to Sierra Emissions website
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Model 640S Steel-Mass™ Insertion Mass Flow Meter
Accurate and repeatable, this product is a rugged and reliable mass flow measurement workhorse in heavy industrial applications.  Product accuracy is ± 1% of reading +0.5% full scale, and the flow range is up to 20,000 sfpm (air) with standard accuracy. It inserts easily into ducts and pipes to monitor total gas mass flow rate.




Model 620S Fast-Flo™ NEMA 4X (IP65) Insertion Mass Flow Meter
A 200 msec fast time-response microprocessor-based transmitter in a NEMA 4X (IP65) enclosure.  Product accuracy is ± 1% of full scale and the flow range is up to 20,000 sfpm (air) with standard accuracy.  Boiler-Trak™ is designed to provide an economical and easy to install solution for natural gas, propane or butane measurement to heaters and boilers. Product accuracy is ± 1% of full scale and the flow range is 80 to 1600 SCFM (natural gas) with standard accuracy.