The Rosemount 3051SAM is a scalable measurement transmitter used as part of the Rosemount 3051S ERS System. Instead of relying on conventional impulse piping to calculate differential pressure, the ERS system electronically links two pressure sensors through an electrical cable and synchronizes their measurements.
This digital architecture is particularly useful for differential pressure level measurement in tall vessels and applications with changing process temperatures. The 3051SAM can operate as the primary or secondary sensor, depending on the selected configuration, and can be paired with another compatible 3051SAM or a Rosemount 3051SAL Level Transmitter.
Key Features
- Electronic differential pressure measurement using two linked pressure sensors
- Coplanar™ and in-line sensor configurations for installation flexibility
- Faster response for differential pressure level measurement compared with traditional systems
- Single two-wire, 4–20 mA HART® loop for system integration
- Digital architecture for stable measurement under changing process temperatures
- Independent sensor installation and servicing to simplify maintenance
- Multiple process connection options, including threaded NPT, flanges, manifolds and Rosemount 1199 remote seals
- Additional process insight through static pressure and sensor module temperature monitoring
- SIL 2/3 certification options under IEC 61508 for applicable safety installations
Suitable Applications
- Differential pressure level measurement
- Tall vessel and storage tank level monitoring
- Chemical and petrochemical processing
- Oil and gas facilities
- Refining operations
- Power generation
- High-temperature process applications
- Applications with changing ambient or process temperatures
- Process control and safety-related measurement systems
Technical Highlights & Selection Considerations
- System configuration: The ERS system requires two compatible sensors connected by an electrical cable. The primary sensor provides the 4–20 mA loop termination; the secondary sensor connects to the primary.
- Sensor compatibility: The system can use a combination of Rosemount 3051SAM and 3051SAL models. Confirm the primary and secondary model numbers before ordering.
- Transmitter style: Select Coplanar™ or in-line construction according to the process connection and installation requirements.
- Performance class: Available ERS performance classes include Classic, Ultra and Enhanced. The appropriate choice depends on accuracy, static pressure and temperature conditions.
- Process connections: Options include threaded NPT, flanges, manifolds and compatible Rosemount 1199 remote seals. Availability depends on the selected configuration.
- Output and communication: The ERS system uses a two-wire, 4–20 mA HART® loop.
- Temperature variation: The digital ERS architecture helps maintain measurement performance in applications with significant temperature changes. Select the appropriate performance class for the actual operating conditions.
- Maintenance: The two sensors can be installed and serviced independently, helping simplify maintenance access.
- Safety certification: SIL 2/3 certification under IEC 61508 applies to specified configurations. Verify the certification and documentation required for the intended safety function.
Frequently Asked Questions
Q1: What is the Rosemount 3051SAM used for?
It serves as a pressure-sensing component of the Rosemount 3051S ERS System, primarily supporting differential pressure and level measurement.
Q2: How does the ERS system calculate differential pressure?
Two compatible pressure sensors are connected by an electrical cable and synchronized. The system electronically calculates differential pressure from their measurements.
Q3: Can the Rosemount 3051SAM operate by itself?
The 3051SAM is designed for ERS applications and requires a second compatible sensor to form a complete ERS measurement system.
Q4: What is the difference between the 3051SAM and 3051SAL?
The 3051SAM is a scalable ERS measurement transmitter available in Coplanar and in-line styles. The 3051SAL is an ERS level transmitter incorporating a remote diaphragm seal. Both can be used together in a compatible ERS system.
Q5: What communication output does the system use?
The complete ERS system uses a two-wire, 4–20 mA HART® loop for integration with compatible control and monitoring systems.
Q6: What should I confirm before purchasing?
Confirm both sensor model numbers, primary and secondary roles, performance class, process connections, pressure and temperature conditions, cable requirements, and any safety certifications required.
