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Our Scientific Product family is split into three groups:  Premium Digital, Traditional Analog, and Economical Analog.  Our Scientific products can measure mass flow rate of any clean dry gas including mixtures, toxics and corrosives.  This product line utilizes “Capillary Tube Thermal” sensing technology and are widely used for precise measurement of very low flows (i.e. 0-10 sccm) as well as higher full scale flow ranges up to 1000 slpm (full scale up to 5600 slpm available upon request). 
If you need to control flow see ALL of our MFC solutions. 
Sierra Mass Flow Meters are available in a wide variety of styles, sizes and prices to fit our customers’ specialized applications.  It is common that more than one may meet your flow range needs.  However, each product does have its own special attributes listed to the right of each product image.

Helpful Hints:
1.  The horizontal bar chart indicates full scale flow rates and shows the model number to the left.  
2.  Your flow range may fit more than one product.  Use the benefits box on the right side to learn more about each product.
We are glad to help you select the right product for your application.  Request a quote and a local expert will contact you to discuss your application.  You may also contact us or use our live help function to get in touch with one of our friendly applications engineers.

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Mass Flow Meter Selection

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.

 





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.