The Rosemount 2051CFA utilizes a patented T-shape averaging pitot tube design to deliver dependable differential pressure flow meter performance. Unlike traditional orifice plates, this low profile sensor creates a fixed separation point, improving the DP signal across a wide flow turndown while ensuring minimal permanent pressure loss.
For high-stakes environments, this safety-certified meter is SIL 2/3 certified to IEC 61508. Integrated WirelessHART technology eliminates complex wiring, providing >99% data reliability and a 10-year SmartPower™ module life.
"This industrial instrumentation solution supports HART 4-20mA and FOUNDATION Fieldbus protocols. The 316 SST wetted material ensures durability for corrosive liquid measurement. Users benefit from scaled variable output and advanced diagnostics through the local operator interface (LOI). It handles differential pressure measurement with a 100:1 rangedown, making it a versatile flow assembly for gas and steam flow. The leak-tested assembly reduces fugitive emissions by 70% during field commissioning."
| Feature | Specification Details |
| Warranty | 5-year limited warranty |
| Rangedown | Up to 100:1 (5:1 flow turndown) |
| Line Size | 2 to 12 in. (50 to 300 mm) |
| Wetted Material | 316 SST |
| Update Rate | 5 sec. to 60 min. (User selectable) |
| Power Module | Up to 10-year life (Field replaceable) |
| Safety | SIL 2/3 Certified to IEC 61508 |
Selecting the correct flow meter is critical for long-term measurement stability and accuracy.
Media Compatibility: Verify your process medium. The standard 316 SST construction is ideal for most non-corrosive or mildly corrosive liquids, gases, and steam.
Line Size Optimization: Ensure your piping falls between 2 to 12 inches (50 to 300 mm). This range allows the Annubar sensor to maintain its specified accuracy and performance.
Communication Strategy: Evaluate your infrastructure. To significantly reduce wiring and labor costs, prioritize the WirelessHART® version, which offers >99% data reliability without physical cabling.
The 2051CFA is engineered for "plug-and-play" efficiency, but precision during setup is key.
Single-Point Penetration: Unlike orifice plates that require pipe section removal, the Annubar only requires a single hole in the pipe. This simplifies the flow assembly process and preserves structural integrity.
Sensor Orientation: Correct orientation is mandatory. Ensure the T-shape sensor face is positioned directly perpendicular to the upstream flow to capture the most accurate differential pressure signal.
Upstream/Downstream Requirements: For optimal performance, install in a straight pipe run to minimize turbulence.
Designed to minimize "Total Cost of Ownership," the 2051CFA provides nearly maintenance-free operation.
Extended Service Life: Utilize the SmartPower™ module for up to 10 years of maintenance-free operation. The module is field-replaceable, meaning you never have to remove the transmitter from the process.
Anti-Clogging Technology: The sensor is designed with a specific Stagnation Zone. This zone prevents particulates from clogging the sensing ports, ensuring measurement stability even in "dirty" fluid environments.
Advanced Diagnostics: Use the Local Operator Interface (LOI) to perform quick health checks and field commissioning without external tools.
Reduces Risk: By clearly defining line sizes and media, it prevents incorrect ordering.
Saves Time: The installation tips emphasize the ease of single-hole penetration compared to traditional DP meters.
Lowers Costs: Highlighting the 10-year battery life and anti-clogging design addresses the user's fear of high maintenance expenses.
Q: What are the primary benefits of the T-shape Annubar sensor?
A: The patented T-shape design creates a fixed separation point to improve the DP signal over a wider flow range while ensuring minimal permanent pressure loss.
Q: Can the Rosemount 2051CFA be used in safety-instrumented systems?
A: Yes, it is SIL 2/3 certified to IEC 61508 by an independent 3rd party for use in high-integrity safety installations.
Q: What is the expected battery life for the wireless version?
A: The SmartPower™ module provides up to 10 years of maintenance-free operation and is field-replaceable without transmitter removal.
