ST100 Series thermal mass flow meters

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ST100 Series thermal mass flow meters from Fluid Components International (FCI) are available with FCI’s VeriCal in-situ calibration verification system. They are suitable for flare gas applications aboard offshore platforms, land-based oil/gas facilities and chemical plants.

Three types of flow meter are available: the FPC style for compressed air and clean gas applications, the S style for wet or dirty gases and erratic flows, and the general-purpose FP style.

The calibration system enables users to verify flow meter calibration in minutes without removing the meter from the pipe or process.

The system is compatible with 4-20 mA analog, frequency/pulse, alarm relays or digital bus communications such as HART, Fieldbus, Profibus or Modbus. It can be adapted with a plug-in card replacement.

The flow meters have an LCD display/readout that provides continuous display of all process measurements and alarm status with the ability to interrogate for service diagnostics. The system stores up to five calibration groups and obtains up to 1000:1 turndown.

The ST100 Series comprises two core model families. ST meters measure mass flow and temperature; STP meters also measure pressure.

The basic insertion-style air/gas 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.

Designed for rugged industrial processes and plants, the meters include service up to 454ºC and are available with both integral and remote (up to 300 m) electronics versions. The ST100 is approved for hazardous environments.

The ST100 flow meter has ATEX and IECEx approval, and its enclosure is ATEX and IECEx certified as flameproof and protected from dust ignition.  The flow meter’s ATEX and IECEx approvals are as follows: Ex d IIC T6/T1 Gb Ta = -40 to +65°C; Ex tb IIIC T85°C/T450°C Db Ta = -40 to +65°C; IP67.  These approvals specify design criteria for flow meters and other electrically powered instruments for use in areas where combustible gases may be present.

The flow meter has full certification from the HART Foundation for its hardware and DD files, indicating full compliance with the HART Communication Protocol. The certification and DD file are available for download from the HART Foundation website.