Rosemount 3051TG4A2B21AK6M5 Pressure Transmitter: Complete Technical Guide
Rosemount 3051TG4A2B21AK6M5 Pressure Transmitter
Model: 3051TG4A2B21AK6M5 | Range: 0-150 psig | Output: 4-20mA with HART Protocol
Product Overview
The Rosemount 3051TG4A2B21AK6M5 is a high-precision, field-hardened pressure transmitter designed for reliable industrial pressure measurement applications. This smart transmitter features exceptional accuracy of 0.04% span and is engineered for 10-year installed stability, making it ideal for critical process control applications across various industries.
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Product Demonstration Video
Technical Specifications
| Parameter | Specification | Details |
|---|---|---|
| Model Code | 3051TG4A2B21AK6M5 | Complete model designation |
| Pressure Type | Gage (G) | Measures pressure relative to atmospheric pressure |
| Pressure Range | 0-150 psig | 0 to 150 pounds per square inch gauge |
| Output Signal | 4-20 mA with HART Protocol (A) | Standard industrial analog signal with digital communication |
| Accuracy | 0.04% of span | Exceptional measurement precision |
| Stability | 10-year installed stability | Long-term reliability without recalibration |
| Process Connection | 1/2-14 NPT female (2B) | Standard pipe thread connection |
| Wetted Parts Material | 316L Stainless Steel (2) | Corrosion-resistant construction |
| Sensor Fill Fluid | Silicone (1) | Standard fill fluid for general applications |
| Housing Material | Stainless Steel (K) | Durable industrial housing |
| Conduit Entry | M20 × 1.5 (K) | Metric thread for cable entry |
| Power Supply | 10.5-42 VDC | Wide operating voltage range |
| Operating Temperature | -40°C to 85°C (-40°F to 185°F) | Wide temperature operating range |
| Environmental Rating | NEMA 4X, IP66 | Dust-tight and water-resistant |
Key Features & Benefits
- High Accuracy: 0.04% span accuracy ensures precise pressure measurement for critical processes
- Long-term Stability: Engineered for 10-year installed stability, reducing maintenance costs
- Smart Communication: HART protocol enables digital communication alongside 4-20mA signal
- Robust Construction: 316L stainless steel wetted parts for corrosion resistance
- Wide Rangeability: 100:1 turndown ratio for flexible application
- Diagnostic Capabilities: Advanced diagnostics for predictive maintenance
- Safety Compliance: Suitable for safety installations with SIL 2/3 capability
- Global Certifications: Compliant with international standards and regulations
Applications
Industrial Applications
The 3051TG4A2B21AK6M5 is suitable for a wide range of industrial applications including:
- Process Industries: Chemical, petrochemical, pharmaceutical manufacturing
- Power Generation: Boiler pressure monitoring, steam systems
- Oil & Gas: Pipeline pressure monitoring, wellhead applications
- Water & Wastewater: Pump control, filtration systems, distribution networks
- HVAC Systems: Building automation, chiller plants
- Food & Beverage: Process control, CIP systems
- Manufacturing: Hydraulic systems, pneumatic controls
Model Code Breakdown
| Code Segment | Description | Meaning |
|---|---|---|
| 3051T | Transmitter Type | Rosemount 3051 Series In-line Pressure Transmitter |
| G4 | Pressure Type & Range | Gage pressure, Range 4 (0-150 psig) |
| A2 | Output Signal | 4-20mA with HART Protocol |
| B2 | Process Connection | 1/2-14 NPT female |
| 1A | Wetted Parts & Fill Fluid | 316L SST wetted parts, Silicone fill fluid |
| K6 | Housing & Conduit | Stainless Steel housing, M20 × 1.5 conduit |
| M5 | Additional Options | Specific configuration options |
Frequently Asked Questions (FAQ)
PSIG (pounds per square inch gauge) measures pressure relative to atmospheric pressure, while PSIA (pounds per square inch absolute) measures pressure relative to a perfect vacuum. The 3051TG4A2B21AK6M5 measures gauge pressure (psig).
Yes, the 316L stainless steel wetted parts provide excellent corrosion resistance for most industrial applications. For highly corrosive media, alternative wetted materials like Hastelloy or Tantalum are available in other model configurations.
HART (Highway Addressable Remote Transducer) is a digital communication protocol that operates on top of the 4-20mA analog signal. It allows for device configuration, calibration, and diagnostics without interrupting the analog signal, enabling smart functionality in traditional control systems.
Thanks to its 10-year installed stability, the 3051TG4A2B21AK6M5 typically requires less frequent calibration than conventional transmitters. However, calibration frequency should be determined based on application criticality and regulatory requirements, typically ranging from 1-5 years.
Yes, the Rosemount 3051 series offers various hazardous area certifications including ATEX, IECEx, and FM/CSA approvals. Specific certifications depend on the exact model configuration and options selected.
The 3051TG4A2B21AK6M5 offers a 100:1 turndown ratio, meaning it can accurately measure pressures as low as 1/100th of its maximum range (1.5 psig) while maintaining specified accuracy.
Installation & Maintenance
Installation Guidelines
- Mount the transmitter in a location accessible for maintenance
- Ensure proper orientation according to manufacturer specifications
- Use appropriate sealing compounds on threaded connections
- Follow proper wiring practices for electrical connections
- Install impulse lines with proper slope for liquid applications
Maintenance Recommendations
- Regular visual inspections for physical damage or corrosion
- Periodic verification of calibration (frequency depends on application)
- Monitor diagnostic information via HART communicator
- Check for proper zero and span values during routine maintenance
- Keep electrical connections clean and secure
Technical References & Citations
Official Documentation & Standards
Primary Reference: Emerson Rosemount 3051 Product Data Sheet (Document 00809-0100-4001)
Industry Standards: Compliant with NACE MR0175/ISO 15156 for sour service applications
Safety Standards: SIL 2/3 capable for safety instrumented systems
Communication Protocols: HART 7 specification compliant
Trust Metrics
- Manufacturer Reputation: Emerson Process Management, global leader in process automation
- Industry Adoption: Over 10 million Rosemount 3051 transmitters installed worldwide
- Certifications: ATEX, IECEx, FM, CSA, NEPSI, and other global certifications
- Warranty: Standard manufacturer warranty with extended options available
- Technical Support: Global network of application engineers and service centers
Comparison with Alternative Models
| Feature | 3051TG4A2B21AK6M5 | Conventional Transmitters | Advantage |
|---|---|---|---|
| Accuracy | 0.04% span | 0.1-0.25% span | 2.5-6x more accurate |
| Stability | 10 years | 1-3 years | 3-10x longer stability |
| Turndown Ratio | 100:1 | 10:1 to 20:1 | 5-10x better rangeability |
| Diagnostics | Advanced HART diagnostics | Basic or none | Predictive maintenance capability |
| Communication | 4-20mA + HART digital | 4-20mA only | Smart functionality without system upgrade |
Conclusion
The Rosemount 3051TG4A2B21AK6M5 represents the pinnacle of pressure measurement technology, combining exceptional accuracy, long-term stability, and smart communication capabilities in a robust industrial package. With its 0-150 psig range and 4-20mA output with HART protocol, this transmitter is ideally suited for demanding industrial applications where reliability, precision, and advanced diagnostics are essential.
Whether for process optimization, safety systems, or general industrial pressure monitoring, the 3051TG4A2B21AK6M5 delivers proven performance backed by Emerson's global reputation for quality and innovation in process automation.
