The Fluid Components International ST51 flow meter is designed to measure the flow of biogases, methane, and other greenhouse gas mixtures. The flow meter comes in an explosion-proof instrument and features a no-moving-parts design that’s nonclogging and operates over a wide flow range with low-flow sensitivity. A big plus is that the meter calibration is matched to the user’s actual gas composition and installation conditions.

The ST51 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 fps and repeatability of ±0.5%. The flow element is available for use in line sizes from 2 to 24 inches diameter. It operates over a wide turndown range of 100:1, which is essential due to the variable gas flows in landfill gas recovery and wastewater treatment. (