• FCI

Thermal Mass Flow Meter

ST50 Remote Mount Flow Meter from Fluid Components International delivers exceptional performance, installation versatility and economy in air, compressed air or nitrogen and a variety of other processes gases, as well as plant HVAC systems. Featuring a highly intelligent, no-moving parts thermal mass flow sensor design, the ST50 Remote Mount flow meter measures airflow from 1 to 125 SFPS (0.3 to 38 NMPS), nitrogen from 1 to 150 SFPS (0.3 to 46 NMPS) and compressed air from 4 to 400 SFPS (1.2 to 122 NMPS). Accuracy is +1% of reading, +0.5% of full scale, with repeatability of +0.5% of reading. It operates at temperatures from 40 to 100°F (4 to 38°C). Remote mount flow meters are ideal in equipment crowded or hazardous plant areas where explosive, flammable or toxic gases may be present near the transmitter's electronics. The rugged ST50 transmitter may be specified with either an 18-36 VDC or an 85 to 265 VAC input power supply and is housed in an all-aluminum, epoxy-coated enclosure that is NEMA 4X (IP66) rated. It features a digital display with an LCD screen that is user scalable to flow rate units or as 0-100 percent. Approvals include FM, CSA and CE Mark. The ST50 is also available with built-in wireless IR communication technology via a standard Palm® OS PDA. The ST50 Remote Mount is field configurable for flow range in standard mass flow or volumetric engineering units. In addition to the wireless IR I/O, it features dual analog outputs (4-20 mA and 0-10 VDC), which are field assignable as flow rate or temperature, and an RS232C I/O port. A 0-1kHz pulse output for totalizing flow is also available as an option. All configurations are easily user set in the field with any standard laptop connected to the RS232C port and/or via the wireless IR link/PDA. Designed for long-life in harsh outdoor installation conditions, the ST50 thermal mass flow sensing element is constructed of stainless steel with Hastelloy-C tips. Its thermal dispersion technology provides direct flow measurement for higher performance at a lower cost by eliminating the need for temperature sensors, flow computers or other devices required with orifice plates, Venturis, Vortex shedding and other meters. This unique design also provides built-in temperature compensation for reliable measurement over a wide temperature range with almost no pressure-drop.