Emerson Rosemount 2051L Level Transmitter is an intelligent level transmitter developed to continuously measure liquid level in tanks, reactors, and storage systems using the hydrostatic pressure principle.
Developed on Rosemount's proven Coplanar™ platform, the 2051L offers: ✔ High measurement accuracy ✔ Long-term stability ✔ Low maintenance requirements ✔ Easy process integration ✔ Reliable operation under demanding process conditions
Thanks to these features, it is widely used in energy, petrochemical, chemical, water & wastewater, and OEM processes.
2051L stands out as an economical and reliable solution, especially for hydrostatic tank level measurements.
Main applications:
Atmospheric tanks
Pressurized tanks
Storage tanks
Chemical process tanks
Condensate tanks
Feedwater tanks
Water and wastewater reservoirs
OEM skid systems
Although the measured variable is liquid level, the transmitter actually measures hydrostatic pressure to calculate the level.
Rosemount 2051L order codes define transmitter configuration.
| Parameter | Description |
|---|---|
| L | Hydrostatic Level Transmitter |
| Measurement Range | Pressure range suitable for tank height |
| Process Connection | ANSI, DIN, NPT, or special connections |
| Wetted Parts | 316L SS, Hastelloy®, Monel®, Tantalum |
| Output | 4–20 mA HART®, FOUNDATION™ Fieldbus, PROFIBUS PA |
| Housing | Aluminum or Stainless Steel |
| Certifications | ATEX, IECEx, FM, CSA, SIL options |
Note: Communication protocols, certifications, and material options vary depending on the ordered model.
2051L1A02A1AB4 Low-level measurement ½" NPT process connection 316L SS diaphragm 4–20 mA HART® IP66 aluminum housing
2051L2A22F1AB4 Medium-level applications 2" DIN flange FOUNDATION™ Fieldbus 316L SS NEMA 4X / IP66
2051L3A05P1AB4 Large tank applications 1" ANSI flange PROFIBUS PA Stainless steel housing
📑 Order codes must always be verified against Emerson datasheet and process conditions.
Rosemount 2051L operates as follows:
Hydrostatic pressure generated by the liquid in the tank is detected.
Transferred to the pressure sensor diaphragm.
Sensor signal is electronically processed.
Temperature compensation is applied.
Measurement value is converted to 4–20 mA or digital communication protocol.
Transmitted to PLC, DCS, or SCADA systems.
This design ensures continuous level measurement with high accuracy.
| Feature | Value |
|---|---|
| Measurement Principle | Hydrostatic Pressure |
| Measured Variable | Continuous Level |
| Output | 4–20 mA |
| Communication | HART®, FOUNDATION™ Fieldbus, PROFIBUS PA |
| Body | Coplanar™ Design |
| Wetted Parts | 316L SS, Hastelloy®, Monel®, Tantalum |
| Protection Class | IP66 / NEMA 4X |
| Certifications | ATEX, IECEx, FM, CSA, SIL options |
⚡ Power Plants
Condensate tanks
Feedwater tanks
Boiler auxiliary systems
🛢️ Oil & Gas
Storage tanks
Process tanks
Separator systems
🧪 Chemical Industry
Corrosive chemicals
Reactors
Dosing tanks
💧 Water & Wastewater
Drinking water reservoirs
Wastewater pools
Pumping stations
🔧 OEM & Skid Systems
Compact process packages
Water treatment skids
Chemical dosing systems
✔ Reliable hydrostatic level measurement ✔ Compact design with Coplanar™ platform ✔ Long-term measurement stability ✔ Low maintenance cost ✔ HART®, FOUNDATION™ Fieldbus, and PROFIBUS PA support ✔ Wide process connection options ✔ Global certification options ✔ Low Total Cost of Ownership (TCO)
Recommended checks during installation:
Zero Trim verification
Sensor Trim check
Loop Test
HART® communication test
Process connection sealing check
Reference level verification
DCS/PLC communication check
| Problem | Possible Cause | Solution |
|---|---|---|
| Measurement drift | Calibration shift | Zero Trim and recalibration |
| Unstable level | Turbulence or foam | Check installation point |
| No communication | HART® configuration | Verify communication settings |
| No output signal | Power supply issue | Check power source |
| Slow measurement | Impulse line issue | Clean line and check connections |
| Feature | 2051L | 2051CD |
|---|---|---|
| Measurement | Continuous level | Differential pressure |
| Main Application | Tank level | Flow, filter, DP measurement |
| Typical Use | Storage tanks | Orifice, Venturi, Pitot |
| Process | Hydrostatic level | Differential pressure |
How does Rosemount 2051L measure level? By measuring the hydrostatic pressure generated by the liquid in the tank and calculating the level.
Which communication protocols are supported? Standard: 4–20 mA HART®. Optional: FOUNDATION™ Fieldbus and PROFIBUS PA.
Which tanks can it be used in? Atmospheric tanks, pressurized tanks, storage tanks, process tanks, and OEM skid systems.
How long does the RFQ process take? Yeşil Grup Enerji typically responds within 24–48 hours through its global sourcing network.
Yeşil Grup Enerji provides the following services for Emerson Rosemount 2051L:
Model code validation
Technical configuration support
Datasheet verification
Cross-reference analysis
Alternative product evaluation
Global sourcing
Fast RFQ management
EPC and international project support
📧 [email protected] 📞 +90 505 696 61 00 🌐 www.yesilgrupenerji.com
Emerson Rosemount 2051L Level Transmitter is a reliable solution that continuously measures level using the hydrostatic pressure principle, offering high accuracy and long-term stability. With Coplanar™ platform, multiple process connections, advanced communication options, and industrial certifications, it is widely used in energy, petrochemical, chemical, water & wastewater, and OEM applications.
Yeşil Grup Enerji, without being an official Emerson distributor, supports projects with model validation, datasheet assistance, alternative product analysis, global sourcing, and fast RFQ management. This independent, multi-brand approach combines competitive offers, flexible delivery, and reliable engineering support through its international supply network.