Flow Measurement Precise Measurement in Harsh Conditions

Editor: Dominik Stephan

Engineers who need accurate measurement of gases or liquids in smaller pipe sizes will find instruments from Fluid Components International (FCI) helpful. Using thermal dispersion flow measurement with no-moving parts, the ST75 Series and ST100L Air/Gas Flow Meters and FLT93L Flow Switch are ideal for use in 0.25 to 2 inch (DN6 to DN50) pipes.

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(Source: FCI)

They excel where low flows, wide-turndowns, dirty fluids, Haz Ex or harsh conditions have to be considered. These flow instruments offer many advantages for service in a wide range of applications: plant, building or lab gas sub-metering, small inlet air/gas feed lines for boilers, gas relief valve monitoring, chemical injection, compressed air systems, cogen or CHP gas fuel measurement and control, sampling systems, and more.

Many small process line applications are difficult to measure reliably with high repeatability due to variations in temperature and pressure, and have wide flow rates. FCI’s thermal flow meters and switches are unaffected by, or have on-board compensation for, temperature and pressure changes and, in addition to superior detection of low flow rates, provide 100:1 turndown as a standard feature.

Between Flow and Cooling

FCI’s highly reliable, small line air/gas flow meters and aid/gas/liquid flow switches combine state-of-art electronics technology with application fluid-matched flow sensors and laboratory calibration in rugged packages designed for the most demanding plant operating environments.

Thermal flow sensor technology developed by FCI relies on the relationship between flow rate and the cooling effect. With no moving parts and minimal invasiveness, these meters and switches provide a highly repeatable, accurate, low cost, easy-to-install solution and there’s virtually no maintenance required over a long life.

Precision Doesn't Require a Large Footprint

FCI’s ST75 Series Air/Gas Flow Meters are ideal for lines sizes from 0.25 (6mm) to 2 inches (51mm). Gas or air measurement accuracy is available up to 1% of reading, ±0.5% full scale. The ST75 Meters feature a wide 100:1 turndown and will measure from 0.01 to 559 SCFM [0,01 to 950 NCMH].depending on pipe size.