FMA900-1 - GENERAL-PURPOSE AIR VELOCITY TRANSDUCERS...

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GENERAL-PURPOSE AIR VELOCITY TRANSDUCERS F-113 Up to 1.5% Accuracy Remote Probe Model Available with 4.6 m (15') Cable Each Unit Individually Calibrated Durable Fast-Response Platinum Sensors Compact Solid-State Electronics Directly Monitors True Air Mass Velocity Linear 0 to 5 Vdc or 4 to 20 mA Output 400 msec Response Time Economical Insertion Design The unique FMA-900 air velocity transducer utilizes both a velocity sensor and a temperature sensor to accurately measure air velocity (in SFPM, standard feet per minute). The built-in temperature sensor automatically corrects the flowrate for temperature variations. Both sensors are rugged glass-coated Platinum resistance detectors (RTDs). The circuit heats the velocity sensor to a constant temperature differential above ambient temperature and measures the cooling effect of the air flow. This design provides excellent low velocity sensitivity and high accuracy. The FMA-900 also features negligible pressure drop. To obtain mass flow rate in SCFM (standard cubic feet/minute), the SFPM velocity indicated by the FMA-900 is multiplied by the cross-sectional area of the pipe or duct in square feet. A traverse across the pipe or duct can be performed to determine the mounting location for average velocity indication. The FMA-900 can be mounted in pipes (down to 38 mm [1.5"] size) with the use of OMEGA ® SSLK compression fittings (SSLK-14-14, $8.50). PTFE ferrules are required (T-FER-1/4, $40/10 pack). Each unit is individually calibrated in OMEGA’s NIST-traceable wind tunnel.
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