Advanced ST100 Air/Gas Flowmeter

FCI’s ST100 flowmeter features the industry’s widest choice of communication options with 4-20 mA analog, frequency/pulse, alarm relays and fully-approved digital communications: HART, Foundation Fieldbus, Modbus and Profibus. It is ideal for service in clean water and waste treatment plants, including applications for aeration systems, digester gas and disinfection gases.

The ST100 flowmeter combines superior flow sensing performance with the most feature- and function-rich electronics available today. The “future-ready” thermal mass gas flowmeter is designed with a plug-in card replacement that can be changed out by technicians in the field to adapt to a plant’s changing network communication needs.

Developed with a graphical, multivariable, backlit LCD display that provides more information than any other thermal flowmeter available, the ST100 brings new meaning to the term “process information.” Its readout continuously displays all process measurements and alarm status, and it has the ability to query for service diagnostics.

The ST100 flowmeter measures gas mass flow rate, total flow, temperature and pressure depending on modelfamily. It can store 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. Also standard is an onboard data logger with an easily accessible, removable 2-GB micro-SD memory card capable of storing 21 million readings.

ST100 flowmeters can be calibrated to measure virtually any process gas, including wet, mixed and dirty gases. The basic insertion style air/gas meter features a thermal flow sensing element that measures flow from 0.25 to 1000 SFPS (0.07 NMPS to 305 NMPS) with accuracy of ±0.75% of reading, ±0.5% of full scale.

Offering service up to 850ºF (454ºC), the ST100 flowmeter is designed for rugged industrial process and plant applications. Both integral and remote (up to 1,000 ft [300 meters]) electronics versions are available. The ST100 is agency approved for hazardous environments, including the entire instrument, the transmitter and the enclosure. Instrument approvals include: FM and FMc: Class 1, Division 1, hazardous locations, Groups B, C, D, E, F, G; ATEX and IECEx: Zone 1, II 2 GD Ex d IIC T4; The rugged enclosure is NEMA 4X/IP67 rated.

Source: Fluid Components Intl.