Mass Flow Meters Conform to EPA Reporting Rule

Sierra Instruments introduced a line of mass flow meters that conform to the new emissions reporting rule from the Environmental Protection Agency. That rule, 40 CFR Part 98, mandates that as of Jan. 2, 2010, U.S. companies that emit more than 25,000 tons a year of carbon dioxide equivalent must report their greenhouse gas (GHG) emissions.

Among Sierra’s three most popular GHG certified mass flow meters are the Boiler-Trak, Model 640S, and Model 780S. Sierra’s Boiler-Trak is a thermal mass flow meter designed for stationary combustion applications (commercial boilers, kilns, and heaters). The Model 640S has been optimized for landfill gas. Landfill gas is very humid at low pressure (20 to 40 mBarg) and about 40C to 60C when it leaves the landfill. Given that the 640S has 100:1 turndown, no moving parts, and generates nominal pressure drop across the sensor probe, it is ideal for this application. The Sierra Model 780S, designed for gas and electricity producers, is used to measure methane from compressors, preheaters, boilers, and other process equipment. (

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