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Rosemount™ 3051CFA Wireless Annubar™ Flow Meter
The Rosemount 3051CFA Wireless Annubar Flow Meter is an industry-leading flow measurement solution paired with a secure WirelessHART®network.
This flow meter is customized with a patented, T-shaped, averaging pitot tube that delivers precise measurement over a wide flow range and maintains a small profile in the pipe to reduce permanent pressure loss. Coupled with WirelessHART® technology, this flow meter offers quick installation of measurement points without the cost of wiring.
Rosemount™ 3051CFA Wireless Annubar™ Flow Meter


Up to 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 96 in. (50 to 2440 mm)
Differential pressure, scaled variable
Communication Protocol
Process Wetted Material
316 SST, Alloy C-276
Basic Diagnostics, Loop Integrity
NACE®, hazardous location, see full specs for complete list of certifications
Update Rate
1 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
  • Patented T-shape sensor creates a fixed separation point for DP signal improvement over a wider flow rate
  • T-shape sensor design offers very low permanent pressure loss
  • 10-year stability and 8:1 flow turndown (150:1 rangedown) produce reliable measurements and application flexibility
  • Complete flow assemblies are leak-tested and calibrated to reduce leak points up to 70% and simplify installation
  • 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