Fluid Components International (FCI) ST75 Flow Meter

Engineers in search of an accurate flow measurement solution for process gas, fuel gas, inert gas or waste gases as well as air in small line sizes will be pleased to learn that the ST75 Flow Meter from Fluid Components International (FCI) is now ATEX and IECEx approved for safety in hazardous and potentially explosive plant environments.

Designed for line sizes from 6 to 51 mm, the flowmeter combines accuracy with a set of features. The unit provides three unique outputs: the mass flow rate, totalised flow and media temperature. It is suitable for applications in a wide range of industries including chemical, electric power, food/beverage, advanced materials, pharmaceuticals, semiconductor and more.

It includes media temperature compensation to ensure performance in rugged environments and features accuracy to ±2% of reading with ±0.5% repeatability. Its 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 including: natural gas, methane, nitrogen, CO₂, argon, all inert gases, compressed air and more.

The flowmeter is equally well suited for low-flow and high-flow operations. It operates over a wide flow range, from 0.01 to 950 NCMH depending on line size. For variable process conditions, the ST75 is factory preset to a wide turndown range at 10:1 to 100:1.

The unit is remote mountable, a suitable choice in equipment crowded plants or hazardous factory areas where explosive, flammable or toxic gases may be present near the transmitter’s electronics. The remote mount transmitter, which includes a full digital display, can be mounted up to 15 m away from its thermal mass flow sensor in the process piping and connected via two 0.50″ FNPT cables.