Thermal Mass Flow Meters for Heavy-Industry

Our heavy-industrial thermal mass flow meters are designed for the most demanding industrial gas mass or air flow measurement applications. Featuring the most advanced digital technology and heavy-duty 316 stainless steel wetted materials, our heavy-industrial thermal mass flow meter line is the answer for the roughest industrial environments. Sierra also manufacturers a complete family of Light-Industrial Thermal Mass Flow Meters

All of our heavy-industrial thermal mass flow meters: Steel-Trak™ Model 640S, Flat-Trak™ Model 780S , and UHP Model 780S feature direct mass flow measurement. Each model also features Sierra’s Smart Electronics Package for field-rangeability, flow-range adjustment, and meter validation and diagnostics. Sierra's heavy-industrial thermal mass flow meters have no moving parts and feature digital signal processing, which allow them to work in the toughest environments.

Sierra's Multi-Trak™ Model 670S is an advanced state-of-the-art instrument for measuring mass flow rates in very large ducts or stacks that have non-uniform velocity profiles, high turn-down requirements, dirty gas streams, wide temperature ranges and fast velocity and temperature changes. For more information on Sierra's leading edge thermal technology read: Technology White Paper: Immersible Thermal Dispersion - 10/15/2008, Dr. John Olin, Founder, Sierra Instruments.

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Sierra has certified several meters ideal for Greenhouse Gas (GHG) measurement meeting all requirements defined by the EPA. Our GHG Certified mass flow meters provide an economical way to totalize methane or natural gas burned, enabling the calculation of CO2 equivalent emissions. Sierra has extensive experience in producing highly accurate and repeatable mass flow meters for methane (CH4) as well as N20, SF6, HFC’s, PFC’s and CO2 as called out in the EPA mandate.  Learn more about Sierra's featured lineup of GHG mass flow meters.

Look for the "GHG Certified" logo
(Left) on Sierra's site, marking products ideal for Greenhouse gas maeasuement.

Steel-Mass™ Model 640S 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.

Multi-Trak™ Model 670S High-Performance Multi-Point  Flow Meter for Large Ducts and Stacks Sierra's Multi-Trak™ Model 670S is an advanced state-of-the-art instrument for measuring mass flow rates in very large ducts or stacks that have non-uniform velocity profiles, high turn-down requirements, dirty gas streams, wide temperature ranges and fast velocity and temperature changes.

Flat-Trak™ Model 780S In-line Mass Flow Meter with Flow Conditioning Like its cousin the Model 640S, the Flat-Trak Model 780S provides repeatable, rugged, and reliable performance. Additionally, the product features Sierra’s flow conditioning elements.  Product accuracy is ± 1% of reading +0.5% full scale, and the flow range is up to 20,000 sfpm (air) with standard accuracy.

Ultra High Purity Model 780S UHP In-line Mass Flow Meter with Flow Conditioning This model is the industry choice for gas distribution in ultra-clean processes. This product features 316L electropolished tubing with 7-10 Ra or 20-25 Ra interior finishes.

Flow-Trak™ Dual-Plate Flow Conditioning Element As used in our Model 780S products, flow conditioning elements represent an economical solution to problems associated with monitoring flow installations where long, straight runs of piping are not available.