EMERSON 1056-03-21-31-AN-UL Rosemount Transmitter

( Brand: Emerson ), ( Manufacturer Part Number: 1056-03-21-31-AN-UL ), ( Part Type: Instrument )

Review EMERSON Rosemount Instrument Transmitter

The Emerson 1056-03-21-31-AN UL Rosemount transmitter is a high-performance, field-mountable device designed to deliver precise and reliable measurement of process variables in industrial environments. Part of Emerson s renowned Rosemount family of transmitters, this model combines robust engineering with advanced digital signal processing to ensure accurate and consistent performance across a wide range of applications, including temperature, pressure, and differential pressure measurements. Engineered with a compact yet durable housing, the 1056 series is built to withstand harsh conditions, featuring an IP66 rating for protection against dust and water ingress, making it ideal for use in demanding industrial settings such as refineries, chemical plants, power generation facilities, and water treatment systems. The transmitter operates on a 2-wire 4-20 mA current loop, providing a stable and noise-resistant signal transmission that is compatible with most industrial control systems, PLCs, and DCS platforms. Its analog output, along with optional digital communication protocols like HART or Foundation Fieldbus, enhances flexibility and integration with existing infrastructure, allowing for seamless data acquisition and monitoring.

The 1056-03-21-31-AN model is specifically configured for temperature measurement, utilizing a high-accuracy thermocouple or RTD (Resistance Temperature Detector) sensor to deliver precise readings over a wide temperature range, typically from -200 C to 600 C, depending on the sensor type. The transmitter s digital signal processing technology minimizes drift and ensures long-term stability, reducing the need for frequent recalibration and maintenance. Its compact design allows for easy installation in tight spaces, while the robust construction ensures durability against vibration, shock, and environmental contaminants. The device also features a user-friendly front panel with an LCD display for local monitoring and configuration, enabling operators to quickly verify readings, adjust settings, and diagnose potential issues without requiring specialized tools. Additionally, the transmitter s compliance with UL (Underwriters Laboratories) standards ensures it meets stringent safety and performance requirements, making it suitable for use in North American markets where regulatory compliance is critical.

Beyond its technical specifications, the Emerson 1056-03-21-31-AN transmitter is engineered with Emerson s commitment to reliability and innovation in mind. The Rosemount brand is synonymous with precision instrumentation, and this transmitter embodies that legacy by delivering consistent performance even in the most challenging conditions. Its modular design allows for easy upgrades and customization, accommodating future advancements in process control technology. Whether deployed in a critical production line, a utility-scale power plant, or a high-precision laboratory, this transmitter provides the accuracy, durability, and flexibility required to maintain optimal operational efficiency. With Emerson s reputation for quality and Emerson s extensive global support network, users can rely on the 1056-03-21-31-AN to deliver dependable performance for years, contributing to enhanced process control, safety, and productivity.

### **Pros and Cons of buying a Emerson 1056-03-21-31-AN-UL Rosemount Transmitter**

#### **Overview**

The Emerson 1056-03-21-31-AN-UL Rosemount transmitter is a high-quality differential pressure (DP) transmitter designed for industrial process control applications. It is part of the Rosemount 3051 series, known for reliability, accuracy, and advanced features. Below is a detailed analysis of its advantages and disadvantages.

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### **Pros**

1. **High Accuracy and Precision**

- The Rosemount 3051 series is renowned for its exceptional accuracy ( 0.075% of reading over the full range), making it ideal for critical process measurements where precision is essential.

2. **Rugged and Reliable Construction**

- Built with a robust stainless steel housing and sealed electronics, it is designed to withstand harsh industrial environments, including high temperatures, vibrations, and corrosive media.

- The transmitter is IP65-rated, providing protection against dust and water ingress.

3. **Wide Range of Measurement Capabilities**

- Suitable for differential pressure, gauge pressure, and absolute pressure applications, depending on the configuration.

- Supports a wide range of process pressures (from vacuum to high-pressure applications) and temperatures (up to 150 C for standard models).

4. **Advanced Communication Protocols**

- Supports HART communication (for field diagnostics and calibration), Foundation Fieldbus, and Profibus PA, enabling integration with modern SCADA and DCS systems.

- HART protocol allows for remote configuration, troubleshooting, and device health monitoring without physical access.

5. **UL Certification**

- The UL listing ensures compliance with North American safety standards, making it suitable for use in facilities where regulatory compliance is mandatory (e.g., manufacturing plants, refineries).

6. **Low Maintenance Requirements**

- The sealed design minimizes the risk of contamination, reducing the need for frequent recalibration or repairs.

- Long-term stability reduces downtime and maintenance costs.

7. **Compatibility with Rosemount s Ecosystem**

- Works seamlessly with other Rosemount instruments and Emerson s process automation software, such as AMS Suite, for predictive maintenance and asset optimization.

8. **Global Availability and Support**

- Emerson has a vast global network of distributors and technical support, ensuring easy access to spare parts, calibration services, and training.

9. **Energy Efficiency**

- The transmitter is designed to operate efficiently with low power consumption, reducing operational costs.

10. **Future-Proofing**

- Compatibility with emerging Industry 4.0 technologies (e.g., IoT integration) allows for smart factory applications, such as remote monitoring and predictive analytics.

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### **Cons**

1. **High Initial Cost**

- The upfront cost of the Rosemount 3051 series is significantly higher than that of generic or lower-end transmitters. This may be a barrier for small-scale or budget-constrained projects.

2. **Complex Installation and Configuration**

- Due to its advanced features (e.g., HART, Fieldbus), installation and setup may require specialized training or technical expertise, increasing labor costs.

- Proper calibration and commissioning are critical to ensure accuracy, which may require additional time and resources.

3. **Limited Local Support in Some Regions**

- While Emerson has a global presence, technical support and spare parts availability may be slower in less developed or remote regions compared to local brands.

4. **Potential for Overkill in Simple Applications**

- For basic or low-precision applications where high accuracy is not critical, the cost and complexity of the Rosemount 3051 may be unnecessary. A simpler, lower-cost transmitter might suffice.

5. **Dependency on Proprietary Software**

- Full utilization of features (e.g., advanced diagnostics) often requires Emerson s proprietary software (e.g., AMS Suite), which may add to licensing costs.

6. **Longer Lead Times for Custom Configurations**

- Customized models or specific ranges may have extended lead times due to production scheduling, which could delay project timelines.

7. **Potential for Obsolescence**

- While Emerson is a stable brand, newer models or alternative technologies (e.g., wireless transmitters) may emerge over time, potentially rendering older models less competitive.

8. **Calibration and Recertification Costs**

- Regular calibration and UL recertification (if required) can incur additional ongoing expenses, though these are typically offset by the transmitter s longevity.

9. **Limited Physical Size Options**

- The transmitter s compact design may not be suitable for applications requiring larger or more robust housings (e.g., extreme outdoor environments).

10. **Training Requirements**

- Operators and maintenance personnel may need training to fully utilize the transmitter s features, adding to training costs.

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### **Conclusion**

The Emerson 1056-03-21-31-AN-UL Rosemount transmitter is a premium choice for industrial applications where **accuracy, reliability, and long-term performance** are critical. Its advanced features, robust construction, and compatibility with modern automation systems make it ideal for **high-stakes processes such as oil and gas, chemical plants, power generation, and water treatment**. However, its **high cost, complexity, and specialized requirements** may not justify its purchase for **low-budget or simple applications**.

For industries prioritizing **precision, safety, and integration with smart systems**, the Emerson Rosemount transmitter is a **strong recommendation**. For cost-sensitive or basic applications, alternatives such as **Endress Hauser, ABB, or lower-end HART-compatible transmitters** may offer a more balanced cost-performance ratio.

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### **Final Recommendation**

- Your application requires **high accuracy ( 0.075% or better)** and **long-term reliability**.

- You operate in **regulated industries (e.g., oil/gas, pharmaceuticals, power plants)** where compliance and safety are paramount.

- You need **advanced diagnostics, Fieldbus/HART communication, and integration with Emerson s ecosystem**.

- You can justify the **higher upfront cost** with reduced maintenance and downtime over the transmitter s lifespan.

- Your budget is **limited**, and a lower-cost transmitter with sufficient accuracy (e.g., 0.1% or 0.2%) will suffice.

- Your application is **simple or low-risk**, and the complexity of the Rosemount is unnecessary.

- You require **local support or shorter lead times**, and a regional brand may be more accessible.

For most **critical industrial applications**, the Emerson Rosemount transmitter remains a **top-tier choice** due to its unmatched performance and industry trust. However, a **detailed cost-benefit analysis** should be conducted to ensure it aligns with your specific requirements.

Details:

21 Measurement 1 typically torridly conductivity. Emerson 1056-03-21-31-AN-UL. Used Removed from working factory. 03 Power relay configuration AC powered variant with relays in most builds.

From Emerson/Rosemount configuration structure: 1056 Dual input analyzer platform.

part #: 1056032131an prices

• $229.00-$849.00

specifications tesmetequ:

• brand: Emerson
• mpn: 1056-03-21-31-an-ul
• part type: Instrument

seller tesmetequ:

• rating: 100.0%
• # reviews: 3727
• city: Edmond, Oklahoma

returns tesmetequ:

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• time: 30 Days
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offer tesmetequ:

• best offers: True
• availability: In Stock
• started: June 9, 2026
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• quantity: 1
• options: Ship-to-home

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general tesmetequ:

• Test, Measurement Inspection > Test Meters Detectors > Other Test Meters Detectors
• condition: Used

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