FCI ST100A Flow Meter for biogas measurement

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Featuring a rugged thermal dispersion flow sensor, the ST100A Flow Meter from Fluid Components International (FCI) eliminates wet gas and entrained moisture issues affecting biogas measurement accuracy in wastewater treatment digester applications and landfill co-gen power systems, as well as providing down-the-pipe rain shielding in petrochemical refineries, power plants and more.

The flow meter, with its innovative Wet Gas MASSter flow sensor, is suitable for biogas measurement in challenging environments, including wastewater treatment plants, landfill operations, oil/gas refineries, power plants and a wide range of other industries. It helps eliminate the effects of wet, sticky biogas that causes corrosion issues potentially affecting gas flow meter sensors, which lead to poor-accuracy flow measurement issues.

The innovative shielded mechanical design of FCI’s wet gas sensor shunts water vapour away before it reaches the sensor and prevents any water vapour from collecting on the sensor head to avoid corrosion and therefore any measurement accuracy or consistency issues. By shunting moisture, condensation and water droplets away from the thermal mass flow sensor, gas flow measurement is maintained while minimising errors that could occur from a cooling effect on the sensor that might cause a spike or false high reading. FCI’s wet gas sensor element option can be used in applications that have either moisture entrained in the gas (annular mist) or for protection against down the pipe rain in larger, vertical stacks.

The meter can be calibrated to measure virtually any wet gas composition, mixed gases, dirty gases and specialty gases. The air/gas flow meter features a thermal flow sensing element that measures flow from 0.07 to 305 NMPS with accuracy of ±0.75% of reading, ±0.5% of full scale. The meter’s insertion-style configuration is suitable for wet gas measurement in larger line sizes with standard adjustable insertion lengths from 25 up to 1524 mm.

The rugged meters are suitable for service up to 454°C and are available with integral or remote electronics (up to 300 m). They are agency approved for hazardous environments, including the entire instrument, the transmitter and the NEMA 4X/IP67 rated enclosure. In addition to SIL-1, approvals include ATEX, IECEx, FM and FMc.