Compare Rosemount 3051 and Yokogawa EJX110A differential pressure transmitters for flow, level and filter monitoring. Review accuracy, rangedown, response, protocols and application fit.
Engineering selection overview
The Rosemount 3051 and Yokogawa EJX110A are established differential pressure transmitters for industrial pipelines. Selection should be based on calibrated span, static pressure, wetted materials, process connection, communication protocol, hazardous-area approval and lifecycle requirements rather than brand alone.
| Selection point | Rosemount 3051 | Yokogawa EJX110A |
|---|---|---|
| Reference accuracy | Up to ±0.04% of span, configuration dependent | ±0.04% standard; ±0.025% option |
| Rangedown | Up to 150:1 | Up to 200:1 |
| Response | Configuration dependent | 90 ms stated response |
| Long-term stability | Up to 10-year stability | ±0.1% of URL over 15 years |
| Typical protocols | 4–20 mA/HART; other options by model | 4–20 mA/HART; FOUNDATION Fieldbus or PROFIBUS PA options |
Values are based on manufacturer family documentation and depend on the ordered model code. Confirm the current datasheet before procurement.
Where differential pressure transmitters are used
Flow measurement
With an orifice plate, Venturi tube, flow nozzle or averaging pitot tube, differential pressure indicates pipeline flow. Verify square-root extraction, impulse-line arrangement and required turndown.
Closed-tank level
For pressurized vessels, the transmitter measures the difference between high- and low-pressure sides. Remote seals may be required for viscous, corrosive, hygienic or high-temperature media.
Filter and strainer monitoring
Rising differential pressure indicates fouling. Alarm points should reflect clean and maximum allowable pressure-loss conditions.
Application comparison
| Application | Key requirement | Selection guidance |
|---|---|---|
| Steam flow | Temperature protection and stable impulse lines | Use condensate pots where required and match manifold pressure rating |
| Oil and gas | Static pressure, approvals and materials | Verify pressure class, hazardous-area certificate and NACE requirements |
| Water treatment | Low pressure loss and maintainability | Confirm wet calibration span and accessible manifold installation |
| Chemical process | Corrosion resistance | Select diaphragm and flange materials from a compatibility review |
Recommended selection workflow
- Define minimum, normal and maximum differential pressure.
- Confirm line pressure and process temperature.
- Select wetted materials and process connection.
- Specify manifold, remote seal and capillary requirements.
- Confirm output, hazardous approval and calibration certificate.
Related products and solutions
Review the Rosemount 3051 Coplanar Pressure Transmitter and Yokogawa EJX110A Differential Pressure Transmitter. Explore all process instrumentation and industry solutions.
Request technical support
Send the medium, operating pressure, temperature, calibrated range, process connection, output and approval requirements to sales@santanfluid.com. WhatsApp: +86 136 9022 3185 (China) or +62 823 1767 3750 (Indonesia).
Official references: Emerson Rosemount 3051 and Yokogawa EJX110A.