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Thermal mass flow meter for hazardous areas

26 July 2010

The advanced ST75 flow meter from Fluid Components International (FCI) is now ATEX and IECEx approved for safety in hazardous and potentially explosive plant environments. ATEX and IECEx approval for potentially explosive environments means that the ST75 Flow Meter is suitable for applications in hazardous plant areas in the European Community and elsewhere worldwide.

Thermal mass flow meter for hazardous areas
Thermal mass flow meter for hazardous areas

Designed for line sizes from 6 to 51mm, the ST75 flow meter combines superior accuracy with a rich set of features. The ST75 provides three outputs: the mass flow rate, totalised flow and media temperature.
The ST75 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 flow meter is remote mountable, an ideal installation 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 15m away from its thermal mass flow sensor in the process piping and connected via two 0.50-inch FNPT cables. The ST75 provides an accurate, fast response and low-maintenance solution to small line size gas and air flow applications in hard to reach or hazardous locations.
The ST75 includes a rugged sensing element constructed with all welded 316 stainless steel and Hastelloy-C tips. It is enclosed in a rugged, all-metal, dust and water resistant NEMA Type 4X (IP66) rated package designed for hazardous area installations. ATEX/IEC approvals include: Zone 1, II 2 G Ex d IIC T6 . . . T3; II 2 D Ex tD A21, IP67 T90º . . . T300º.


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