3051SFA O₂ Flow Meter – High-Accuracy Differential Pressure Transmitter for Oxygen Measurement
The Rosemount 3051SFA O₂ Flow Meter is a high-performance differential pressure transmitter designed for precise and reliable oxygen flow measurement in demanding industrial applications. Engineered with advanced pressure sensing technology, it delivers exceptional accuracy, long-term stability, and safety compliance for oxygen service. With its robust construction, oxygen-cleaned wetted materials, and integrated flow calculation capabilities, the 3051SFA ensures consistent performance in industries such as steelmaking, chemical processing, and energy production. Its modular design allows easy integration into process control systems, making it a trusted solution for critical oxygen flow monitoring.
Oxygen Flow Measurement – Product Comparison Table
| Feature / Model |
Rosemount 3051SFA O₂ Flow Meter |
Rosemount 8800 Vortex Flow Meter |
Rosemount 8700 Coriolis Flow Meter |
| Measurement Principle |
Differential Pressure (DP) with primary element (e.g., orifice, Annubar) |
Vortex shedding frequency |
Coriolis effect (direct mass flow) |
| Medium |
Oxygen gas (requires oxygen-cleaned wetted parts) |
Oxygen gas, steam, other gases |
Oxygen gas, liquids, multi-phase |
| Accuracy |
±0.075% of span (DP), with mass flow calculation ±1–2% typical |
±1% of reading (gas/steam) |
±0.1% of mass flow |
| Pressure & Temperature Compensation |
Yes (with 3051SMV multivariable: DP + static pressure + temperature) |
Optional temperature compensation |
Not required (direct mass flow) |
| Safety for O₂ Service |
Oxygen-cleaned, oil-free assembly required |
Oxygen-cleaned option available |
Oxygen-cleaned option available |
| Typical Applications |
Industrial oxygen pipelines, steelmaking, chemical plants |
Utility oxygen flow, steam/air/oxygen distribution |
High-purity oxygen, medical/semiconductor gas supply |
| Installation |
Requires primary element (orifice plate, Annubar, Venturi) |
Inline, no moving parts |
Inline, direct mass flow |
| Maintenance |
Moderate (inspection of primary element) |
Low (no moving parts) |
Low (robust, but higher cost) |
| Cost Level |
Medium (depends on primary element) |
Medium |
High |
Typical Applications of the Rosemount 3051SFA O₂ Flow Meter
- Steel and Metallurgy
- Monitoring oxygen flow in blast furnaces and converters.
- Ensures precise oxygen enrichment for combustion efficiency and reduced emissions.
- Chemical and Petrochemical Plants
- Accurate oxygen dosing in oxidation and synthesis processes.
- Supports safe handling of oxygen in high-pressure pipelines.
- Energy and Power Generation
- Oxygen flow measurement in boilers and gas turbines.
- Enables optimized combustion control and improved thermal efficiency.
- Healthcare and Medical Gas Supply
- Monitoring oxygen distribution in centralized hospital gas systems.
- Ensures reliable supply for critical care and surgical applications.
- Electronics and Semiconductor Manufacturing
- High-purity oxygen flow control in wafer fabrication and oxidation furnaces.
- Provides stable, contamination-free measurement for sensitive processes.
- Environmental and Safety Systems
- Oxygen injection in wastewater treatment for aeration.
- Continuous monitoring in safety-critical oxygen supply lines.
Frequently Asked Questions (FAQ)
Q1. What is the Rosemount 3051SFA O₂ Flow Meter?
A1. It is a high-accuracy differential pressure transmitter configured for oxygen flow measurement. It combines proven Rosemount DP technology with oxygen-cleaned wetted parts to ensure safe and reliable operation.
Q2. Can it be used for other gases besides oxygen?
A2. Yes, the 3051SFA can measure the flow of various gases and liquids when paired with the appropriate primary element. However, for oxygen service, special cleaning and material requirements must be met.
Q3. How accurate is the 3051SFA O₂ Flow Meter?
A3. It provides up to ±0.075% of span accuracy for differential pressure measurement. When used with multivariable compensation (pressure and temperature), it delivers highly accurate mass flow results.
Q4. What safety measures are required for oxygen service?
A4. All wetted parts must be oxygen-cleaned and free of oils, greases, or contaminants. Emerson provides oxygen-cleaned assemblies that comply with international standards for oxygen applications.
Q5. What industries typically use this flow meter?
A5. Common applications include steelmaking, chemical processing, energy and power generation, medical gas distribution, and semiconductor manufacturing.
Q6. How is it installed?
A6. The 3051SFA is typically paired with a primary element such as an orifice plate, Annubar, or Venturi tube. It can be mounted directly or remotely, depending on process requirements.
Q7. Does it support digital communication protocols?
A7. Yes, it supports HART®, FOUNDATION™ Fieldbus, and WirelessHART® for seamless integration into modern process control systems.
Q8. What maintenance is required?
A8. Routine inspection of the primary element and verification of transmitter calibration are recommended. The transmitter itself is designed for long-term stability and minimal maintenance.
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