Fluid Components International ST75 Air/Gas Flow Meter

The ST75 Air/Gas Flow Meter from Fluid Components International (FCI) measures fuel gas, process gas, inert gas, waste gases and air in small line sizes. It is suitable for optimising natural gas flow control for industrial ovens, heat chambers and furnaces to reduce process and plant fuel costs.

The meter is suitable for low-flow and high-flow operations in industrial ovens and operates over a wide flow range, from 0.01 to 950 NCMH depending on line size. For variable process conditions, the meter is factory preset to a turndown range of 10:1 to 100:1.

With built-in temperature compensation, the meter maintains consistent performance in rugged, hot industrial process environments.  It features accuracy to ±2% of reading with ±0.5% repeatability over varying process temperatures in line sizes from 6 to 51 mm.

The meter’s precision flow element has a no-moving parts design that employs platinum RTD sensors embedded in equal mass thermowells with microprocessor electronics calibrated to laboratory standards for a wide range of gases.

The meter features remote-mounting capabilities for hazardous or crowded plant environments. The remote-mount transmitter can be mounted up to 15 m away from its thermal mass flow sensor in the process piping.

The fully scalable dual 4-20 mA standard outputs are user assignable to flow rate and/or temperature and a 0-1 kHz pulse output of total flow. The instrument can be ordered for input power with either 18 to 36 VDC or 85 to 265 VAC.

The device is enclosed in an all-metal, dust- and water-resistant NEMA Type 4X (IP66) rated package designed for hazardous area installations.