FCI's Model ST51 Mass Flow Meter is built with no moving parts and no orifices to clog or foul

Fluid Components International's (FCI) Model ST51 Mass Flow Meter is built to provide precise air/gas flow measurement in demanding environments. Designed for high performance, the ST51 Flow Meter is constructed to be an explosion-proof instrument that requires little maintenance. The ST51 is constructed to feature a no-moving parts design that’s non-clogging and operates over a wide flow range with low-flow sensitivity. It is made to be packaged in an explosion-proof transmitter, and the calibration is designed to match to the user’s actual gas composition and installation conditions.

The ST51 Flow Meter is constructed to feature a thermal mass, insertion-style flow element with flow accuracy to ±1% of reading over a broad flow range from 0.3 to 400 SFPS (0.08 to 122 MPS), and repeatability of ±0.5 percent of reading. The flow element is made to be available for use in line sizes from 2 to 24 inches (51 to 610 mm) diameters. It is designed to operate over a wide turndown range of 100:1, which is essential due to the variable gas flows in wastewater treatment plants and landfill gas operations. It is built to operate at temperatures from 0 to 250°F (-18 to 121°C) and withstand pressures up to 500 psig [34 bar (g)].

The ST51 Flow Meter’s thermal mass flow sensing element is built with no moving parts and no orifices to clog or foul. The flow element is constructed with a 316L stainless steel body and Hastelloy C-22 thermowell sensors to resist corrosion. It also is designed to include built-in temperature compensation circuitry for measurement year-round.

The ST51 flow meter is made with outputs for user interfaces and information. Dual 4-20mA analog outputs are constructed to be user assignable to flow rate and/or temperature, and there is a 0-1kHz pulse output for totalized flow. The transmitter’s digital communications are made to include an RS-232C port, and with units that have the digital display option there is a wireless IR link for PDA use.

The ST51’s optional integral digital display are made to feature a two-line, 16-character LCD screen that can be rotated in 90-degree increments. The LCD screen’s top line is made to be assigned to flow rate, and the bottom line is user assignable for temperature readings or totalized flow.

For applications with difficult access or display readability, the ST51’s flow transmitter is also designed to be available in a remote mount configuration that can be mounted up to 50 feet (15m) away from the flow element inserted the pipe. Both the remote mount and integral transmitters are designed to be housed in an aluminum enclosure that is NEMA 4X approved and meets IP67 requirements for water and dust ingress protection. Input power for the ST51 is made to be selected as either 18 to 36 Vdc or 85 to 265 Vac.

The ST51 Flow Meter is constructed with safety approvals including: FM, CSA/CRN, Class 1, Div 1, Groups B, C, D; Class 1, Div II, Groups A-D, ATEX Zone 1, II 2 G Ex d IIC T6 …T3, II 2 D Ex tD A21 IP67 T90°C…T300°C.

ST51 WWT Biogas 1113 lo
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