The Rosemount 3051S MultiVariable Transmitter is designed for industrial applications that require multiple process measurements from a single instrument. By combining differential pressure, static pressure, and temperature measurement, it can reduce installation complexity and support more efficient flow measurement.
The transmitter features Emerson's SuperModule™ technology and can be configured for different process conditions and communication requirements. When paired with a compatible primary flow element and correctly configured for the application, it can calculate compensated flow directly, helping reduce measurement uncertainty caused by pressure and temperature variations.
Key Features
- Multivariable measurement of differential pressure, static pressure, and process temperature
- Integrated flow calculations for compensated mass, energy, or volumetric flow in supported configurations
- All-welded SuperModule™ design for demanding industrial environments
- Reduced instrumentation requirements by combining multiple measurements in one device
- Up to ±0.04% of reading accuracy with the Ultra for Flow performance option under specified conditions
- Callendar–Van Dusen sensor matching to improve temperature measurement accuracy
- Up to 200:1 rangedown, depending on configuration
- Multiple communication options, including 4–20 mA HART®, WirelessHART®, and FOUNDATION™ Fieldbus
- Engineering Assistant software for streamlined configuration
- Compatible primary flow element options to simplify installation and commissioning
- SIL 2/3 certification options for specified safety-related configurations
Suitable Applications
- Differential pressure flow measurement
- Compensated mass flow measurement
- Natural gas and industrial gas metering
- Steam flow measurement
- Liquid flow monitoring
- Oil and gas processing
- Chemical and petrochemical plants
- Refining operations
- Power generation
- Energy flow monitoring
- Industrial process control
- Applications requiring reduced instrumentation and wiring
Technical Highlights & Selection Considerations
- Measured variables: Combines differential pressure, static pressure, and process temperature measurement. Verify the variables and outputs supported by the selected model.
- Flow calculations: Built-in calculations can report fully compensated mass, energy, or volumetric flow in supported configurations. Confirm the required flow element, fluid properties, and compensation method.
- Accuracy: The Ultra for Flow option offers accuracy as low as ±0.04% of reading under specified conditions. Overall flow-system accuracy also depends on the primary element, installation, and operating conditions.
- Rangedown: Up to 200:1, depending on the selected transmitter configuration and measurement requirements.
- Temperature input: Callendar–Van Dusen sensor matching can improve temperature measurement accuracy when used with a compatible, properly characterized RTD.
- Communication: Choose wired HART®, WirelessHART®, or FOUNDATION™ Fieldbus according to the selected model and control-system requirements.
- Wireless power: Supported wireless versions can use a replaceable SmartPower™ module rated for up to 10 years under specified conditions. Actual service life depends on update rate and operating environment.
- Process connections: Confirm pressure range, connection type, wetted materials, manifold requirements, and compatibility with the selected primary flow element.
- Configuration: Use the appropriate Engineering Assistant software and model-specific documentation to configure flow calculations and process parameters.
- Safety approvals: SIL 2/3 certification is available for specified configurations. Confirm certification details and suitability for the intended safety instrumented function.
Frequently Asked Questions
Q1: What is the Rosemount 3051S MultiVariable Transmitter used for?
It measures differential pressure, static pressure, and process temperature, particularly for industrial flow applications requiring compensated flow calculations.
Q2: Can it measure mass flow directly?
Yes. Supported configurations provide built-in calculations for fully compensated mass flow. The correct flow element, process inputs, and configuration are essential for accurate results.
Q3: What is the advantage of multivariable measurement?
Combining several process measurements in one transmitter can reduce the number of instruments, process connections, impulse lines, and wiring required.
Q4: Which communication protocols are available?
Depending on the configuration, the transmitter supports 4–20 mA HART®, WirelessHART®, or FOUNDATION™ Fieldbus.
Q5: What is the Ultra for Flow option?
It is a performance option designed to optimize flow measurement, with pressure measurement accuracy as low as ±0.04% of reading under specified conditions.
Q6: What should I confirm before purchasing?
Confirm the required measurement variables, flow element, differential and static pressure ranges, temperature sensor, communication protocol, process connections, wetted materials, flow calculation requirements, and required certifications.
