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Precision Flow Meters

Optimizes Air Flow Control for Operation of Industrial Blowers and Dryers

| Editor: Ahlam Rais

The meter’s unique design provides built-in temperature compensation for reliable measurement over a wide temperature range with almost no pressure-drop.
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The meter’s unique design provides built-in temperature compensation for reliable measurement over a wide temperature range with almost no pressure-drop. (Source: FCI)

Engineers responsible for the efficient operation of industrial air blowers and dryers used in raw materials production will find the ST50 Mass Flow Meter Series from Fluid Components International (FCI) beneficial as it provides precision measurement of air to increase the efficiency of their systems.

Relying on FCI’s highly accurate thermal dispersion mass flow sensing technology, the flow meters provide accurate and repeatable direct mass flow measurement at a lower cost. With the ST50 meter, there is no need for temperature sensors, flow computers or the other devices that are required with orifice plates, Venturis, Vortex shedding and other flow meters, opines the firm. The meter’s unique design also provides built-in temperature compensation for reliable measurement over a wide temperature range with almost no pressure-drop.

Offering a wide flow range, the flow meter measures air, compressed air or nitrogen from 0.75 to 400 SFPS (0.23 to 122 MPS) in line sizes from 2 to 24 inches (51 to 610 mm). Flow meter accuracy is up to +1 % of reading, +0.5 % of full scale, with repeatability of +0.5 % of reading. The meter operates at temperatures from up to 0 to 250°F (-18 to 121°C). Turndown ratio is up to 100: 1, adds the company.

The flow range of the Series can be field-configured in either standard mass flow or volumetric engineering units. It also features dual analog outputs: two 4-20 mA outputs, which are field assignable to flow rate or temperature and an RS232C I/O port. A 0-500 Hz pulse output for totalized flow is also available as an option. All configurations are easily user set in the field with any standard laptop to the RS232C port and/or via the wireless IR link/PDA.

According to the company, the meter’s rugged stainless steel sensing element with Hastelloy-C tips is designed for endurance in heavy duty plant, outdoor and field installation conditions. Its electronics are housed in an all-aluminum, epoxy-coated enclosure that is Nema 4X (IP66) rated. The entire instrument features FM/CSA agency approvals for Class 1, Div 2, Groups A, B, C and D; Atex, GOST-R, CPA, Belgim (Belrus), CE Marketing, CRN and PED.

There are two process connections options available for the meter: 1/2-inch MNPT or 3/4-inch MNPT with a stainless steel or Teflon ferrule. It is available in three field adjustable U-length probes: 1-6 inches (25-152mm), 1-12 inches (25-305 mm) and 1-18 inches (25-457mm) for pipe sizes 2 to 24 inches (51 to 610mm). Instrument powering options include both DC (18-36Vdc) and AC (85-265Vac). The mass flow meter comes with a 1-year standard warranty.

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