Gas (Mass Flow) (All Gases, including mixtures, toxics and corrosives)
We have two product families: Scientific & Industrial Thermal.

See (All) gas flow products

Why Mass Flow? Learn More...

Scientific Product Family (Gas Mass Flow up to 1000 slpm):
Our Scientific Product Family offers you a powerful choice in gas mass flow products.  If you only need to measure the mass flow rate of gas, choose from our line of Mass Flow Meters (MFM).  If you would like to regulate as well as measure gas mass flows, select from among our Mass Flow Controllers (MFC) with integrated valve and control electronics.  Our Scientific Products can be used with any clean dry gas you choose, including mixtures, toxics and corrosives.  The Scientific Product Family utilizes our patented Laminar Flow Element Technology and Thermal Capillary Tube flow sensors to create some of the highest performance, inherently linear mass flow instruments in the world.  Our Scientific Products are widely used for precise measurement and/or control over an enormous flow range:  from ultra low flows (less than 10 sccm) up to 1000 slpm (up to 5600 slpm available upon request). 

Our Scientific Product family is split into three groups:  Premium Digital, Traditional Analog, and Economical Analog. We also offer Gas Flow Calibrators for validation and primary standard calibration of our Scientific Products.

MFC Selection Chart: If you need to control gas mass flow, view ALL mass flow controller (MFC) products by flow rate and model number.

MFM Selection Chart: If you need to only measure gas mass flow, view ALL mass flow meter (MFM) products by flow rate and model number.

Premium Digital 100 Series: Learn more…

Traditional Analog Model 730, 820S, 830 & 840: Learn More…

Economical Analog Model 810C & 820 Series: Learn More…

Gas Flow Calibrators: Learn More…

Industrial Thermal Product Family (Gas Mass Flow 1000 slpm & higher):
Our Industrial Thermal products utilize “Immersible Thermal” sensing technology and are widely used for precise mass flow measurement in light-industry, heavy-industry, hazardous environments, and Ultra High Purity (UHP) applications.  Rugged and reliable, our line of industrial thermal mass flow meters are work horses in industry and are commonly used to measure Air and Natural Gas as well as all other industrial gases and mixtures.  Full scale flow rates are generally above 1000 slpm (35 scfm, lower flows available upon request). We offer a high temperature (HT) industrial thermal version as well for high temperature gas above 375C (700F). 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 high pressure gas above 250 psi up to 5000psi, we recommend our Multiparameter Mass Vortex products as a great optimal solution.

Sierra has certified several light and heavy industrial thermal mass flow meters for greenhouse gas (GHG) measurement.  These meters are ideal for GHG measurement meeting all requirements defined by the new EPA rule (CFR 40 Part 98). 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. 
 

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

Select and Size: Industrial Thermal Selection Chart:

(Do more research or request an industrial thermal quote below)

Light-Industrial: Learn more…
(Light industrial )


Heavy-Industrial & Hazardous Areas: Learn More…
 (Heavy Industrial & Hazardous Areas)

UHP Ultra High Purity Gas: Learn More…
(UHP)


High Temperature Gas up to 375C (700F): Learn More…
(High Temperature)

High Pressure Gas: We recommend our Multiparameter Mass Vortex.
(High Pressure)