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Rosemount™ 2051CFC Compact Annubar™ Flow Meter
rosemount 2051cfc annubar flowmeter
The Rosemount 2051CFC Compact Annubar Flow Meter is designed to provide industry-standard performance with dependable flow measurements.
The averaging pitot tube of this flow meter has a patented T-shaped design that includes a flat upstream surface for high performance over a wide flow range. For installation, this flow meter sensor is positioned between raised-face flanges, eliminating the need for impulse piping and additional process penetrations.
Rosemount™ 2051CFC Compact Annubar™ Flow Meter


5-year limited warranty
Up to 100:1 (5:1 flow turndown)
Measurement Range
Up to 1000 inH2O (2,48 bar) differential
Line Size
2 to 8 in. (50 to 200 mm)
Differential pressure, scaled variable
Communication Protocol
4-20 mA HART®, WirelessHART®, FOUNDATION™ Fieldbus, PROFIBUS®, 1-5 V Low Power HART®
Process Wetted Material
316 SST
Basic Diagnostics
SIL 2/3 certified to IEC 61508 by an independent 3rd party, NACE®, hazardous location, see full specs for complete list of certifications


  • Complete flow assemblies are leak-tested and calibrated to reduce leak points up to 70% and simplify installation
  • Compact pitot tube designed to fit and install between raised-face flanges for straightforward installation
  • Local operator interface with easy-to-use menus and built-in configuration buttons for streamlined commissioning
  • T-shape sensor with flat upstream surface offers a fixed separation point for high performance over a wide flow range
  • Sensor stagnation zone positioned to reduce noise, measurement inaccuracies and keeps particulates from clogging
  • SIL 2/3 certified to IEC 61508 (via 3rd party) and prior-use certificate of FMEDA data for safety installations