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Rosemount™ 2051CFA Wireless Annubar™ Flow Meter
Featuring industry-standard performance, the Rosemount 2051CFA Wireless Annubar Flow Meter provides dependable flow measurements via WirelessHART®technology.
With the security of a WirelessHART® network, this flow meter is able to deliver >99% data reliability. This device includes a T-shaped, averaging pitot tube that maintains a small profile in the pipe to reduce permanent pressure loss and offers precise measurements over a wide flow range via a single pipe penetration.
Rosemount™ 2051CFA Wireless Annubar™ Flow Meter


�5-year limited warranty
Up to 150:1 (8:1 flow turndown)
Measurement Range
Up to 1000 inH2O (2,48 bar) differential
Line Size
2 to 12 in. (50 to 300 mm)
Differential pressure, scaled variable
Communication Protocol
Process Wetted Material
316 SST, Alloy C-276
Basic Diagnostics
NACE®, hazardous location, see full specs for complete list of certifications
Update Rate
5 sec. to 60 min., user selectable
Power Module Life
Up to 10-year life, field replaceable (order separately)
Wireless Range
Internal antenna (225 m)


  • WirelessHART® technology is secure, cost-effective and delivers >99% data reliability
  • Complete flow assemblies are leak-tested and calibrated to reduce leak points up to 70% and simplify installation
  • Patented T-shape sensor creates a fixed separation point for DP signal improvement over a wider flow rate
  • SmartPower™ module provides up to 10-year maintenance-free operation and field replacement without transmitter removal
  • Easy installation enables quick instrumentation of measurement points without the cost of wiring