Flowmeter for biofuel and biomethane applications

Tuesday, 07 April, 2009 | Supplied by: AMS Instrumentation & Calibration Pty Ltd


Fluid Components International has released its Model ST51 mass flowmeter for owners, operators and manufacturers of biogas production and methane capture and recovery systems. These users will find the unit provides features required of these applications in an explosion-proof instrument that is easy to install, safe and requires virtually no maintenance.

It features a no moving parts design that’s non-clogging and operates over a wide flow range with low-flow sensitivity. It has an explosion-proof transmitter, and the calibration is matched to the user’s actual gas composition and installation conditions.

In anaerobic digester produced biogas, gas flow measurement is challenged by the wet, dirty nature of biogas. The biogas produced is a potentially dangerous mixed composition of primarily methane (CH4) and carbon dioxide (CO2), with smaller percentages of hydrogen sulfide (H2S) and other gases. The wetness, H2S and other particulates in the gas create a corrosive condensate that deposits itself on the pipe wall and instruments in the pipe. The gas flow varies widely too — based on fluctuating plant process demands and seasonal variations in temperature and humidity.

The flowmeter is designed specifically to measure biogas and all methane composition gases including natural gas. It features a thermal mass, insertion-style flow element with flow accuracy to ±1% of reading over a broad flow range from 0.3 to 400 sfps (0.08 to 122 mps), and repeatability of ±0.5% of reading. The flow element is available for use in line sizes from 51 to 610 mm diameters. It operates over a wide turndown range of 100:1, which is essential due to the variable gas flows in wastewater treatment. It operates at temperatures from -18 to 121°C and withstands pressures up to 34 bar(g).

Online: www.ams-ic.com.au
Phone: 03 9017 8225
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