Emerson Rosemount 2051SFC Flow Meter

Emerson Rosemount 2051SFC Compact Orifice Flow Meter: Complete Technical Specifications and Model Breakdown

The Emerson Rosemount 2051SFC Compact Orifice Flow Meter delivers reliable flow measurement in a space-saving, easy-to-install package. Combining the industry-proven 2051 differential pressure transmitter with a compact orifice primary element, this instrument provides accurate flow data for closed-loop control, general process monitoring, and custody transfer applications across liquid, gas, and steam services. With multiple communication protocols including HART, WirelessHART, FOUNDATION Fieldbus, and PROFIBUS, the 2051 SFC platform offers flexible integration with existing control systems-38.

Core Technical Specifications

The 2051SFC platform is built on the scalable 2051 architecture, delivering industry-standard performance across a broad range of line sizes and operating conditions.

Product Family: 2051SFC
This designation identifies the device as a Rosemount 2051 Series Compact Orifice Flow Meter integrating differential pressure measurement with a compact primary element design.

Measurement Capabilities:

Output variables: Differential pressure, scaled variable

Flow turndown: Up to 100:1 rangedown (typically 5:1 to 14:1 flow turndown depending on configuration)

Differential pressure range: Up to 1000 inH₂O (2.48 bar)-38

Line size range: 0.5 to 12 inches (15 to 300 mm)-38

Performance Specifications:

Reference accuracy: Up to 0.05% of span for the 2051 transmitter-3

Long-term stability: Up to ±0.125% of URL for 5 years-

Rangeability (transmitter): Up to 100:1-3

Warranty: Up to 5-year limited warranty-3-38

Environmental Process Conditions:

Process temperature range (with 1595 orifice plate): -320 to 1200°F (-196 to 649°C)-3

Maximum operating pressure: ANSI B16.5 2500# rating for the conditioning orifice plate-3

Fluid compatibility: Liquid, gas, and steam service-3

Process wetted materials: 316/316L SST, Alloy C-276, Alloy 400, Tantalum options-3

Communications & Output:

4-20 mA HART®-

WirelessHART®

FOUNDATION™ Fieldbus

PROFIBUS®

1-5 V Low Power HART®

Diagnostics:

Basic Diagnostics for loop integrity monitoring-3

Certifications & Approvals:

SIL 2/3 certified to IEC 61508 by independent third party-3

NACE® compliance for sour service applications

NSF certification

Full hazardous location certifications (ATEX, IECEx, FM, CSA)

Prior-use certificate of FMEDA data for safety installations-

Wireless Specifications (for WirelessHART versions):

Update rate: 1 second to 60 minutes, user selectable-3

Power module life: Up to 10 years, field replaceable (ordered separately)-3

Wireless range (internal antenna): 225 meters (738 feet)-3-38

Data reliability: >99% data reliability-3

Detailed Model Breakdown: 2051SFC1CS040N065T33KA1B5Q4Q8J5E1M5

The complete ordering code 2051SFC1CS040N065T33KA1B5Q4Q8J5E1M5 specifies a fully configured compact orifice flow meter. Below is a cylinder-by-cylinder breakdown:

Product Family: 2051SFC
Identifies the device as a Rosemount 2051 Series Compact Orifice Flow Meter. This platform combines the 2051 differential pressure transmitter with a compact orifice primary element within a single mechanical assembly.

Option 1: Measurement Type — “1”
Differential pressure measurement configuration. The 2051SFC provides DP measurement as the primary flow-sensing variable.

Option 2: Primary Element Type — “C”
Compact orifice plate configuration. When equipped with the patented 4-hole conditioning plate, this design enables accurate flow measurement even in turbulent flow profiles-3.

Option 3: Material Type — “S”
316 stainless steel wetted construction. This material provides broad chemical compatibility and corrosion resistance for general industrial flow applications.

Option 4: Line Size — “040”
Nominal line size of 4 inches (100 mm), appropriate for standard pipe diameters within the 0.5 to 12-inch operating range of the 2051SFC platform.

Option 5: Primary Element Details — “N065”
Beta ratio of 0.65 for the conditioning orifice plate. The Beta ratio (β = orifice bore diameter / pipe internal diameter) determines the relationship between pressure drop and flow rate. A Beta of 0.65 provides a balanced response across flow ranges.

Option 6: Temperature Measurement — “T33”
Integrated RTD temperature sensor option, enabling temperature-compensated flow calculations when process temperature variations affect volumetric flow rates.

Option 7: Transmitter Connection Platform — “K”
Direct-mount configuration between flanges using integral manifold or direct impulse line connection.

Option 8: Differential Pressure Range — “A1”
Lower range differential pressure sensor calibrated for low-flow applications requiring high sensitivity.

Option 9: Static Pressure Range — “B5”
Static pressure sensor range configuration matched to the intended process pressure conditions.

Option 10: Transmitter Output — “Q4”
4-20 mA output with HART digital communication protocol, providing both analog process variable transmission and digital device configuration capabilities.

Option 11: Transmitter Housing Type — “Q8”
Aluminum housing with M20 × 1.5 conduit entry carrying PlantWeb housing features.

Option 12: Transmitter Performance Class — “J5”
Standard performance configuration with up to 0.05% reference accuracy and 5-year stability for reliable flow measurement.

Option 13: Hazardous Location Certifications — “E1”
ATEX flameproof certification, appropriate for Zone 1/2 hazardous area installations per European ATEX Directive requirements.

Option 14: Display — “M5”
LCD display for local process variable readout and field configuration access.

Key Design Features of the 2051SFC Platform

Patented 4-Hole Conditioning Plate Technology
The conditioning orifice plate features four symmetrical orifice holes that condition the flow profile, reducing upstream piping requirements. This design requires only 2 diameters of straight run upstream and 2 diameters downstream, significantly minimizing installation footprint compared to traditional orifice metering setups-3.

Coplanar Technology Platform
The Rosemount 2051SFC uses the patented Coplanar technology platform, allowing direct mounting to the primary element. This design delivers fully assembled, leak-tested configurations that eliminate separate impulse lines and reduce potential leak points-3.

Direct-Mount Installation
Every 2051SFC flow meter comes factory-configured and leak-tested, ready for direct installation between existing raised-face flanges. The assembly requires no impulse lines, special flanges, or pipe modifications, reducing installation complexity and cost-3.

Self-Centering Mechanism
An integrated self-centering mechanism ensures optimal accuracy by correctly positioning the orifice plate relative to the pipe bore. This feature simplifies alignment between flanges and improves overall measurement reliability-3.

WirelessHART® Capability
The WirelessHART version of the 2051SFC platform (which shares the same core platform) delivers secure, cost-effective wireless data transmission with >99% data reliability. The SmartPower™ module provides up to 10 years of maintenance-free operation and can be field-replaced without transmitter removal, enabling quick instrumentation of remote measurement points without wiring costs-3.

SIL 2/3 Certification
The 2051SFC platform is SIL 2/3 certified to IEC 61508 by an independent third party, with prior-use certificate of FMEDA data for safety instrumented system installations. This certification makes the 2051SFC suitable for safety-related flow monitoring applications-3-.

Local Operator Interface (LOI)
An optional Local Operator Interface provides easy-to-use menus and built-in configuration buttons for streamlined commissioning without requiring separate handheld communicators. The LCD display shows process variables in engineering units for local readout-3.

Application Suitability

The 2051SFC family, including configuration 2051SFC1CS040N065T33KA1B5Q4Q8J5E1M5, is engineered for reliable operation across diverse industrial applications:

Line Size Flexibility
Product family available for 0.5 to 12-inch line sizes, accommodating a broad range of pipe diameters from small-bore to standard industrial piping-38

Temperature Capability
Process temperature range from -320 to 1200°F (-196 to 649°C) for the conditioning orifice plate when paired with the 2051 transmitter-3

Pressure Capability
Maximum operating pressure up to ANSI B16.5 2500# rating for the orifice plate, with transmitter range up to 2000 psi differential measurement-3

Media Compatibility
Clean liquids, gases, and steam across a wide range of process conditions-3

Certifications
Full hazardous location certifications including ATEX, IECEx, FM, CSA, NACE compliance, NSF, and SIL 2/3 safety ratings-3-38

Simplified Installation Benefits

The 2051SFC platform significantly reduces installation complexity compared to traditional DP flow measurement systems:

Reduced leak points up to 70% compared to traditional orifice meter runs with separate impulse lines-

Factory leak-tested and calibrated assemblies requiring no field assembly or calibration before installation-38

No special tools required for installation — the self-centering mechanism ensures proper alignment without complex procedures

Shorter straight-pipe requirements — only 2D upstream and 2D downstream vs. 10-20D for traditional orifice meters-3

Compact form factor fits into existing piping without removal of large pipe sections