Technical Specifications and Performance
Measurement Range and Accuracy
The Rosemount 1151DP, as a differential pressure transmitter, offers a wide measurement range that sets it apart from other models in the 1151 series. It can measure pressure differences from as low as 0-0.12 kPa to as high as 0-20.7 MPa, making it suitable for a diverse array of applications. This expansive range is particularly beneficial in processes where pressure variations can be significant. In terms of accuracy, the Rosemount 1151DP boasts an impressive ±0.075% of span, which is among the highest in the 1151 series. This level of precision is crucial in applications where even minor deviations can have substantial impacts on process outcomes. Other models in the series, while still highly accurate, may not match this level of precision across such a wide range.
Response Time and Stability
Another area where the Rosemount 1151DP distinguishes itself is in its rapid response time. With a typical response time of less than 100 milliseconds, it outperforms many other models in the series. This quick response is vital in dynamic processes where rapid pressure changes need to be detected and acted upon swiftly. Stability is another key factor where the 1151DP excels. It offers long-term stability of ±0.1% of URL per year, which is superior to some other models in the series. This enhanced stability translates to reduced need for recalibration and increased reliability in long-term installations.
Environmental Adaptability
The Rosemount 1151DP is designed to operate in a wide range of environmental conditions. It can function effectively in temperatures ranging from -40°C to 121°C (-40°F to 250°F), which is broader than some other models in the 1151 series. This temperature range makes it suitable for use in diverse industrial settings, from cryogenic applications to high-temperature processes. Moreover, the 1151DP offers superior resistance to vibration and shock compared to some other models. This resilience is particularly valuable in harsh industrial environments where equipment is subjected to constant mechanical stress.
Application Versatility and Specialized Features
Process Compatibility
The Rosemount 1151DP stands out in terms of its compatibility with a wide range of process media. Its wetted parts are available in various materials, including 316L stainless steel, Hastelloy C, and Monel, allowing it to handle corrosive fluids that might be challenging for other models in the series. This versatility makes the 1151DP an excellent choice for industries dealing with aggressive chemicals or abrasive materials. Furthermore, the 1151DP is capable of handling both liquids and gases, as well as steam applications. This multi-fluid compatibility is not universally available across all models in the 1151 series, making the 1151DP a more versatile option for facilities with diverse process requirements.
Specialized Measurement Capabilities
While many models in the 1151 series are designed for specific types of pressure measurement (such as gauge or absolute pressure), the Rosemount 1151DP excels in differential pressure applications. This makes it particularly useful in scenarios where the difference in pressure between two points is the critical measurement, such as in flow measurement using orifice plates or in level measurement in pressurized tanks. The 1151DP also offers unique capabilities in low-pressure applications. Its ability to accurately measure small pressure differences makes it ideal for applications like filter monitoring or HVAC system balancing, where other models might lack the necessary sensitivity.
Integration and Communication Features
In terms of integration with broader control systems, the Rosemount 1151DP offers more advanced options compared to some other models in the series. It supports various communication protocols, including HART (Highway Addressable Remote Transducer), which allows for digital communication overlaid on the 4-20 mA analog signal. This feature enables remote configuration and diagnostics, setting it apart from models that only offer analog output. Additionally, the 1151DP can be equipped with local indicators and configuration interfaces, providing on-site visibility and control that may not be available with all models in the series. This local interface capability can be crucial in applications where frequent monitoring or adjustments are required.
Maintenance, Reliability, and Total Cost of Ownership
Calibration and Maintenance Requirements
The Rosemount 1151DP is designed with ease of maintenance in mind, which sets it apart from some other models in the 1151 series. Its modular design allows for easy replacement of individual components, reducing downtime during maintenance operations. The transmitter also features advanced diagnostics capabilities, which can predict potential issues before they lead to failures, allowing for proactive maintenance. Calibration of the 1151DP is typically less frequent than with some other models, thanks to its superior long-term stability. This reduced need for calibration translates to lower maintenance costs and less process interruption over the life of the instrument.
Reliability and Longevity
The Rosemount 1151DP is renowned for its exceptional reliability, even in challenging industrial environments. Its robust construction and high-quality materials contribute to a longer operational life compared to some other models in the series. This reliability is particularly evident in its ability to withstand pressure spikes and overrange conditions without losing calibration or suffering damage. Furthermore, the 1151DP's advanced electronics are designed for longevity, with components selected for their long-term stability and resistance to environmental factors. This results in a lower failure rate and extended mean time between failures (MTBF) compared to some other models in the 1151 series.
Total Cost of Ownership Considerations
While the initial purchase price of the Rosemount 1151DP may be higher than some other models in the 1151 series, its total cost of ownership often proves to be lower over the long term. This is due to several factors, including its longer operational life, reduced maintenance requirements, and superior accuracy which can lead to process improvements and energy savings. The 1151DP's versatility also contributes to a lower total cost of ownership in facilities with diverse measurement needs. Its ability to handle a wide range of applications can reduce the need for multiple specialized instruments, simplifying inventory management and reducing spare parts costs.
Conclusion
The Rosemount 1151DP distinguishes itself within the 1151 series through its superior accuracy, versatility, and reliability. Its advanced features and robust design make it an excellent choice for demanding industrial applications, offering long-term value despite a potentially higher initial investment. If you want to get more information about this product, you can contact us at lm@zyyinstrument.com.
