The Rosemount 2051 Coplanar™ Pressure Transmitter is a highly specialized and innovative differential pressure (DP) transmitter from Emerson Automation Solutions, engineered to address specific challenges in modern process measurement. While building upon the proven reliability and performance of the classic Rosemount 2051 platform, the Coplanar™ design introduces a unique physical configuration that significantly enhances measurement stability, simplifies installation, and reduces maintenance, particularly in demanding and high-vibration applications.
The defining characteristic of the 2051 Coplanar™ transmitter is its integrated, flange-mounted design. Unlike traditional DP transmitters that have separate process flanges connected via impulse piping or capillary tubes to remote seals, the Coplanar™ design incorporates the pressure sensor and the process flange into a single, compact, and unified housing. The term "Coplanar" refers to the fact that the diaphragm of the pressure sensor is mounted flush and in the same plane as the process flange face. This innovative configuration is a direct response to common issues encountered in traditional installations, such as the need for extensive piping, potential leak points, and the negative effects of mechanical stress and thermal expansion on measurement accuracy.
A primary advantage of this integrated design is the virtual elimination of error-inducing mechanical stresses. In a conventional remote seal system, the capillary tubes and mounting hardware can transmit pipe strain and vibration to the sensor, causing signal noise and measurement drift. The 2051 Coplanar™'s rigid, one-body construction isolates the sensor from these external forces, resulting in exceptionally stable and repeatable measurements, even in high-vibration environments like compressor stations, pump discharge lines, or large piping systems. This stability is crucial for critical applications such as compressor anti-surge control or precise filter monitoring.
Furthermore, the Coplanar™ design drastically simplifies installation and reduces the total cost of ownership. A traditional DP installation with remote seals requires numerous components: impulse piping, tubing, valves, manifolds, and supports. Each connection is a potential leak point, especially with hazardous or valuable fluids. The 2051 Coplanar™ requires only a single direct flange connection to the process, dramatically reducing the number of potential leak paths. This not only enhances safety but also cuts installation time and material costs by up to 50%. Maintenance is also simplified, as there are no capillary lines to refill or bleed, and the entire unit can be easily serviced or calibrated.
The heart of the transmitter remains the proven, reliable sensor technology found in the 2051 series. It utilizes a capacitive, all-welded stainless steel sensor that provides excellent overpressure protection and long-term durability. The device delivers high accuracy, typically better than ±0.1% of calibrated span, ensuring precise measurement for process control and optimization. It is housed in a rugged, cast aluminum enclosure rated NEMA 4X (IP66), designed to withstand harsh environmental conditions.
Communication is handled via the industry-standard 4-20 mA analog output with HART Protocol. This allows for easy integration into existing control systems and enables remote configuration, calibration, and diagnostics using a HART handheld communicator or asset management software like Emerson's AMS Suite. Advanced diagnostics provide alerts for potential issues, supporting predictive maintenance strategies.
| Category | Details |
|---|---|
| Product Name | Emerson Rosemount 2051 Coplanar™ Differential Pressure Transmitter |
| Series/Platform | Based on the Rosemount 2051 platform with Coplanar™ flange-mounted design |
| Defining Feature | Integrated process flange + sensor in one compact body- Sensor diaphragm flush and coplanar with flange face- Eliminates need for impulse piping, capillaries, and extra hardware |
| Key Advantages | - Isolates sensor from pipe strain, vibration, and thermal stress- Exceptional stability and repeatability in high-vibration applications- Reduces installation cost and time by up to 50%- Fewer leak points → enhanced safety |
| Performance | - Accuracy: typically ±0.1% of span- Capacitive, all-welded stainless steel sensor- Excellent overpressure protection- Long-term durability and stability |
| Installation Benefits | - Requires only one direct flange connection- No capillaries to bleed or refill- Fewer components (no impulse lines, manifolds, tubing)- Simplified service and calibration |
| Construction & Protection | - Rugged cast aluminum housing- Protection rating: NEMA 4X (IP66)- Built for harsh industrial environments |
| Communication | - 4–20 mA analog output with HART Protocol- Remote configuration, calibration, and diagnostics- Compatible with Emerson AMS Suite for predictive maintenance |
| Applications | - Compressor stations (anti-surge control)- Pump discharge lines- Filter monitoring- High-vibration or large piping systems |
| Industry Use | Oil & Gas, Chemical Processing, Power Generation, and other industries requiring stable, safe, and accurate pressure measurement |
| Overall Summary | A specialized DP transmitter with flange-mounted Coplanar™ design, delivering superior stability, simplified installation, fewer leak points, and lower total cost of ownership. Ideal for demanding, high-vibration, safety-critical applications. |
In summary, the Rosemount 2051 Coplanar™ Pressure Transmitter is a purpose-built solution that transcends the capabilities of a standard DP transmitter. Its integrated, flange-mounted design is not merely a convenience but a fundamental improvement that delivers superior measurement stability by isolating the sensor from mechanical stress. By significantly reducing installation complexity, potential leak points, and maintenance requirements, it offers a significantly lower total cost of ownership. It is the ideal choice for challenging applications in industries such as oil and gas, chemical processing, and power generation, where reliable and stable pressure measurement is paramount for safety, efficiency, and profitability.
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