Flowmeter Home » Products » Accurate Air Flow Meter Measuring in Industrial Environments
Water is Precious. Conserve Now.

Thermal Mass Flow Meter Measurement For Demanding Environments

Advanced Technology For Precision Measuring of Gas Mass Flow Rate

North America's #1 selling thermal mass flow meter (2009 Flow Research) delivers more precise measurements with heavy-duty thermal flow meters calibrated for both low-temperature and the most demanding high-temperature industrial gas mass and air flow meter measurement applications.  Sierra manufactures a wide variety of inline and insertion thermal mass air flow meters for precision CFM (cubic feet per minute) measurement of gas mass flow rate in industrial environments.  Our thermal air flow meters range from our highest-performance QuadraTherm® four-sensor design, to our more traditional, but also very accurate, two-sensor instruments.

For customers who enjoy the many benefits of thermal technology—wide turndown ratio, very low pressure drop, no moving parts, application flexibility, and a direct digital gas mass flow rate measurement—now you get extreme precision with percent of reading accuracy as part of the total QuadraTherm package.

All of our thermal air flow meters for high-temperature measuring feature the long-term stability of our patented no-drift DrySense velocity sensor technology backed by a lifetime warranty. As the name implies, Sierra’s velocity sensor is the only thermal heat sensor in the world that is truly “dry”. Our proprietary swaging process eliminates all air gaps between the heated velocity sensor and the tubular probe without the need for any "wet" potting compounds, such as epoxy, ceramic cement, thermal grease, or alumina powder. These wet velocity sensors have increased skin resistance, decreased sensitivity, and, most importantly, age and crack over time causing sensor drift and reduced long-term accuracy.

The result of DrySense is maximum sensitivity, reproducibility, immunity to cracking and shifting over time, and ultimately greatly improved CFM air flow meter accuracy.  Sierra also manufactures a range of Light-Industrial thermal mass flow meters.

For easy systems integration, we offer the following digital communications solutions: Foundation Fieldbus, HART, Modbus RTU, and Profibus DP. View all of our digital communications solutions offering turnkey solutions for industrial systems automation and control. 

» QuadraTherm Selection Chart
» Traditional Thermal Selection Chart

 

QuadraTherm (Advanced Four-Sensor Design)

model_780i_fam QuadraTherm® 780i Inline Mass Flow Meter
Best Accuracy: ± 0.5% of reading above 50% of the full scale; built-in flow conditioning; multivariable outputs, flow range up to 60,000 sfpm (305 smps), qTherm®, Dial-A-Gas®, Dial-A-Pipe, Hazardous Area approvals. Digital communications solutions include: Foundation Fieldbus, HART, Modbus RTU, and Profibus DP.

 

model_640i_fam QuadraTherm® 640i Insertion Mass Flow Meter
Accuracy: ± 0.75% of reading above 50% of the full scale; 3/4" (19.1 mm) insertion probe up to 72" (2m) long, multivariable outputs, air flow range up to 60,000 sfpm (305 smps), qTherm®, Dial-A-Gas®, Dial-A-Pipe, Hazardous Area approvals. Digital communications solutions include: Foundation Fieldbus, HART, Modbus RTU, and Profibus DP.

 

Traditional Thermal (Two-Sensor Design)

SteelMass™ 640S Insertion Mass Flow Meter
Accuracy: ± 1.0% of reading +0.5% full scale; Accurate and repeatable, this product is a rugged and reliable mass airflow measurement workhorse in heavy industrial applications; flow range is up to 20,000 sfpm with standard accuracy. Digital communications solutions include: Foundation Fieldbus, HART, Modbus RTU, and Profibus DP.

 

 

FlatTrak™ 780S In-line Mass Flow Meter with Flow Conditioning
Accuracy: ± 1.0% of reading +0.5% full scale; provides repeatable, rugged, and reliable high-temperature performance and built-in flow conditioning, flow range is up to 20,000 sfpm with standard accuracy. Digital communications solutions include: Foundation Fieldbus, HART, Modbus RTU, and Profibus DP.

 

 

Specialty Application Thermal Mass Flow Meters

Ultra High Purity 780S UHP In-line Mass Flow Meter with Flow Conditioning
This 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. Digital communications solutions include: Foundation Fieldbus, HART, Modbus RTU, and Profibus DP.

 

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

 

ChlorineTrak™ 760S In-line Mass Flow Meter
  A special version of the 780S, the ChlorineTrak 760S is specifically designed as a cost-effective mass air flow measurement solution for chlorine injection processes found in typical waste-water treatment applications. Product accuracy is +/- 5% of  full scale, and the flow range is up to 300 scfm chlorine in a 4” Kynar® flow body. Digital communications solutions include: Foundation Fieldbus, HART, Modbus RTU, and Profibus DP.



FlowTrak™ Dual-Plate Flow Conditioning Element
As used in our 780i and 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.

 

 

Report Bug
Sending Report...
Send Feedback Report

Name


Reproducibility (Did you try to reproduce the issue?)


Classification


Summarize the problem but be specific enough that it can be recreated.

Note: Page, browser, and OS are automatically saved

* Limited time online offer for select ultrasonic liquid flow meters. For online purchases only. Offer ends 9/26/14.