Fluid Components International (FCI) says its new ST100 Series thermal mass flow meter combines superior flow sensing performance with enhanced electronics to meet evolving plant gas flow measurement applications. Whether the need is for conventional 4-20 mA analog, frequency/pulse, alarm relays or advanced digital bus communications such as HART, Foundation Fieldbus, Profibus or Modbus, the ST100 can provide a solution, according to the supplier. Should a plant’s needs change over time or an upgrade become necessary, the ST100 adapts with a plug-in card replacement that can be changed out by plant technicians in the field.  The instrument measures gas mass flow rate, total flow, temperature and pressure, depending on the model family, stores up to five unique calibration groups to accommodate broad flow ranges, differing mixtures of the same gas and multiple gases, and obtains up to 1000:1 turndown. An optional, patent-pending SpectraCal gas equivalency calibration method lets users select and switch between 10 common gases.   Also standard is an onboard data logger with 2-GB micro-SD memory card capable of storing 21 million readings. ST100 flow meters are designed for service at up to 850ºF (454ºC).  Both integral and remote—up to 1,000 ft (300 m)—electronic versions are available. The ST100 is agency approved for hazardous environments, including the entire instrument, transmitter and enclosure.

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