The ST50 Flow Meter is an accurate, easy to install, nomoving parts solution for measuring and controlling air, compressedair or nitrogen flow. ST50 utilizes FCI proven thermaldispersion technology to provide direct mass flow measurement resulting in higher performance at a lower cost than orificeplates, DP, Vortex shedding and other thermal devices. Themeter installs in line sizes ranging from 2 inches to 24 inches[51 mm to 610 mm] with 1/2″ or 3/4″ NPT.ST50 uses precision, lithography structured platinum RTDsensors embedded in FCI’s equal mass small diameter, all metalthermowells. Combined with microprocessor electronics and precision calibration, the ST50 achieves excellent accuracy, fastresponse and virtually maintenance free operation.To serve a variety of application and installation requirementsthe ST50 is available in three standard configurations as shownbelow. (Other display options are described in Accessory RemoteDigital Display section.)

To provide convenient and easy access for wire-up and signalisolation, the instrument’s enclosure features dual conduitports in either NPT or M20 threads, as well as removable frontand rear covers. ST50 can be ordered for DC (18V to 36V) orAC (85V to 265V) power.The ST50 is available with four calibration and final set-upselections. Two are standard calibrations suitable for finalranging and set-up in the field and two are for factory customcalibration withfactory performed final ranging and set-up.All final set-up and flow ranges are subject to 100:1 maximumand 3:1 minimum turndowns.Two standard calibrations include one for air or nitrogenflow rates between 1.25 SFPS to 125 SFPS [0.4 NMPS to 38NMPS] in service pressures between 10 psia to 50 psia [0.7 bar(a) to 3.5 bar(a)] and one for compressed air, air or nitrogen flows between 4 SFPS to 400 SFPS [1.2 NMPS to 122 NMPS] in service pressures between 50 psia to 165 psia [3.5 bar(a) to 11.4 bar(a)]. All final user configurations for flow range, specific line size, standard volumetric or mass flow and engineering units are easily set-up in the field with a PC, PDA or FC88 programmer.Alternatively, custom factory calibration and set-up is available for air or nitrogen with flow between 0.8 SFPS to 150 SFPS [0.2 NMPS to 46 NMPS] at service pressure between 10 psia to 50 psia [0.7 bar(a)to 3.5 bar(a)] or compressed air, air or nitrogen flow between 2.5 SFPS to 400 SFPS [0.8 NMPS to 122 NMPS] with service pressure between 50 psia to 165 psia [3.5 bar(a) to 11.4 bar(a)].