Fluid Components International ST50 Flow Meter Series air blowers and dryers

The ST50 Mass Flow Meter Series from Fluid Components International provides precision measurement of air to increase the efficiency of industrial air blowers and dryers used in raw materials production.

Using thermal dispersion mass flow sensing technology, the flow meters provide accurate and repeatable direct mass flow measurement at a lower cost. There is no need for the temperature sensors, flow computers or the other devices required with orifice plates, Venturis, Vortex shedding and other flow meters. The ST50’s 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 ST50 measures air, compressed air or nitrogen from 0.23 to 122 MPS in line sizes from 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 -18 to 121°C. Turndown ratio is up to 100:1.

The flow range of the ST50 can be field-configured in either standard mass flow or volumetric engineering units. It 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 totalised flow is also available.

The ST50 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.

There are two process connections options available: 1/2″ or 3/4″ MNPT with a stainless steel or Teflon ferrule. It is available in three field-adjustable U-length probes: 25–152, 25–305 and 25–457 mm for pipe sizes 51 to 610 mm. Instrument powering options include both 18–36 VDC and 85–265 VAC.