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Gas Flow ( All Products)
Browse all of Sierra's gas mass flow meters, mass flow controllers and flow switches.
Learn More About Selecting Sierra's Gas Mass Flow Products
Premium Digital Gas Mass Flow Meters & Controllers
Today's Most Advanced Mass Air Flow Sensors, Controllers and Flow Meters
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Smart-Trak® 2 Model 100 Mass Flow Meters & Controllers Digital high performance, stainless steel with Dial-A-Gas® Technology & computer control. Flow ranges from 0 to 15 sccm to 0 to 1000 slpm.   |
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Micro-Trak™ Model 101 Ultra Low Flow Mass Flow Meters & Controllers Specifically designed for flow ranges under 4 sccm (smlm) with a minimum controllable mass flow rate of 0.1 sccm (smlm). Also get digital high performance, stainless steel construction with Dial-A-Gas® Technology & computer control. |
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Max-Trak® Model 180 Industrial Mass Flow Meters & Controllers Industry’s only NEMA 6/IP67 truly industrial MFC; Available as heavy industrial flanged version; Accuracy of +/- 1% of Full Scale and flow ranges from 0 to 10 SLPM to 0 to 1000 SLPM |
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Compod™ Programmable Control Module Add Compod to any 100 Series model to get multi-drop RS-485/MODBUS RTU. With MODBUS, multiple instruments can be daisy-chained over a single network. |
Analog Mass Flow Meters & Controllers
Today's Most Advanced Mass Air Flow Sensors, Controllers and Flow Meters
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Side-Trak® Model 840 Traditional Analog Stainless Steel Mass Flow Controllers An accurate and reliable stainless steel MFC with a wide flow range. Accuracy of +/- 1% of full scale and flow ranges from 0-10 sccm to 0-5600 slpm.   |
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Side-Trak® Model 830 Traditional Analog Stainless Steel Mass Flow Meters An accurate and reliable stainless steel MFM with a wide flow range. Accuracy of +/- 1% of full scale and flow ranges from 0-10 sccm to 0-5600 slpm. |
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Fast-Trak™ Model In-line Mass Flow Meter A solution for applications requiring fast-response measurement and low-flow sensitivity. Product accuracy is ± 1% of full scale and the flow ranges from 0-200 scfm (air) with standard accuracy. |
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Top-Trak® Model 822S & Model 824S Econimical Analog Stainless Steel Mass Flow Meters A value-priced, stainless steel MFM with available large tiltable LCD readout. Accuracy of +/- 1.5% of full scale (+/-1% of FS optional) and flow ranges from 0-10 sccm to 0-500 slpm. |
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Flo-Box™ Model 951 & 954 Digital Control/Readout and Power Supply Systems The 950 Series includes a compact, single channel device and a deluxe, multi-channel device for operation of up to four mass flow instruments. The 950 Series is designed for use with the Sierra Model 830L, 830M, 840L and 840M instruments, but can be used on any brand of MFM or MFC. |
Economical Line of Air Flow Meters and Controllers
(For ALL Inert Gases)
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Mass-Trak® Model 810C Mass Flow Controllers with display Inexpensive nylon MFC with available large tiltable LCD readout for use with ALL inert gases. Accuracy of +/- 1.5% of full scale and flow ranges from 0-10 sccm to 0-50 slpm. |
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Top-Trak® Model 822/824 Mass Flow Meters Inexpensive nylon MFM’s with available large tiltable LCD readout for use with ALL inert gases. Accuracy of +/- 1.5% of full scale and flow ranges from 0-10 sccm to 0-50 slpm. |
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Top-Trak® Model 826/827 High Flow Mass Flow Meters Inexpensive aluminum MFM for higher flows of ALL inert gases with available large tiltable LCD readout. Accuracy of +/- 1.5% of full scale and flow ranges from 0-75 slpm to 0-175 slpm. |
Light-Industrial Thermal Mass Flow Meters
Thermal Air Flow Meters for Light-Industrial Products
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Boiler-Trak™ Smart Insertion Gas Flow Meter Boiler-Trak™ is designed to provide an economical and easy to install solution for natural gas or propane measurement to heaters and boilers and is optimized for greenhouse gas measurement. Product accuracy is ± 1% of full scale and the flow range is 80 to 1600 SCFM (natural gas) with standard accuracy.  |
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Fast-Flo™ Model 620S 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. |
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Fast-Trak™ Model 730 In-line Mass Flow Meter A solution for applications requiring fast-response measurement and low-flow sensitivity. Product accuracy is ± 1% of full scale and the flow ranges from 0-200 scfm (air) with standard accuracy. |
Heavy Industry Thermal Mass Flow Meters
Today's Most Advanced Mass Air Flow Sensors, Controllers and Flow Meters
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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 and is optimized for greenhouse gas measurement. |
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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.   |
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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. The Model 780S is also optimized for greenhouse gase measurement. |
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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. |
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Flow-Trak™ Dual-Plate Flow Conditioning Element |
Heavy Industry Flow & Level Switch
Today's Most Advanced Mass Air Flow Sensors, Controllers and Flow Meters
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Flow Switch for Gases & Liquids Switches on a flow/no flow condition in both gases and liquids. Flow Switch range of 0.01 to 5 fps in liquids and 0.1 to 500 fps gases. Response Time of 0.5 to 10 seconds (media dependent) Wide operating temperature range of -100F to +390F (-70C to 200C) CE, CENELEC and CSA approvals. |
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Level Switch for Liquids Indicates liquid level in tanks and process vessels. Switches on level change of 0.03 inch (dry to wet and wet to dry) Response Time: 0.1 to 1 second (media dependent). Wide operating temperature range of -100F to +390F (-70C to 200C). CE, CENELEC and CSA approvals. |
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High Temperature Flow Switch; Up to 850F Designed for medium and high temperature applications. Medium Temperature to 300C (572F) ; High temperature to 485C (850F). Optional remote electronics for use in medium and Hi T environments. Switches on a flow/no flow condition in both gases and liquids. Flow Switch range of 0.01 to 5 fps in liquids and 0.1 to 500 fps gases. Response Time of 0.5 to 10 seconds (media dependent). CE, CENELEC and CSA approvals. |
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Sanitary Flow Switch |
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Live-Tap (Hot-Tap) Flow Switch |
Multivariable Mass Vortex
Gas, Liquid and Steam (Saturated & Superheated)
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Innova-Mass® Model 240 In-line Multivariable Mass Vortex Flow Meter |
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Innova-Mass® Model 241 Immersible Multivariable Mass Vortex Flow Meter |
Volumetric Vortex Flow Meters
Gas, Liquid and Steam (Saturated & Superheated)
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Innova-Flo® Model 240V In-line Vortex Flow Meter |
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Innova-Flo® Model 241V Immersible Vortex Flow Meter |
