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Thermal Air Flow Meters for Light-Industrial Products

Our light-industrial thermal air flow instruments are specifically designed to provide a cost-effective solution for all inert industrial gases, for methane (natural gas), or for propane. Our thermal air flow meters provide common-sense solutions for most common air, nitrogen, and methane applications.

Because of the small footprint, our light-industrial instruments – Boiler-Trak™, , Fast-Flo™ Model 620S, and Accu-Mass™ Model 730 – are a popular choice for Original Equipment Manufacturers (OEM's) who need an economical solution and have space constraints. Sierra's light-industrial thermal air flow instrument products deliver an exceptional turndown ratio and high accuracy at a price that can't be beat.


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. Product accuracy is ± 1% of full scale and the flow range is 80 to 1600 SCFM (natural gas) with standard accuracy.

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.

Model 730 Accu-Mass™ Inline 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.

Specializing In Thermal Air Flowmeters

Our light-industrial thermal air flow meters are a cost-effective solution for measuring inert and natural gases or propane.

  • Featuring a multitude of configurations and body sizes from 1/4" to 1.5", our Model 730 Accu-Mass™ is a high-performance inline mass flowmeters.  It has a flow range of up to 20,000 sfpm (standard feet per minute) and can measure most inert gases as well as natural gas and propane.
  • Our Model 620S Fast-Flo™ is an insertion mass flowmeter specifically optimized for inert gases with a fast response at 200 milliseconds. It also features a low pressure drop and low-flow cutoff.
  • Both our Model 620S Boiler Trak™ is an insertion mass flow meter optimized for flammable gases, including methane, natural gas and propane and is designed to meet new regulations for monitoring NOx emissions in small to medium size boilers.

View our product line brochure for more info on our thermal mass flow meters and controllers or request a quote.

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Light-Industrial Air Flow Meters Product Line Summary