3051CD Differential Pressure Measurement
Introduction:
The Rosemount 3051CD is a highly accurate and durable differential pressure transmitter designed for demanding industrial applications, offering exceptional precision (±0.04% of span), long-term stability, and versatile integration through its Coplanar™ platform. Ideal for flow, level, and filter monitoring, it supports HART®, Fieldbus, and WirelessHART® communication, making it a trusted choice across industries like oil & gas, chemical, and water treatment.
Rosemount 3051 Series Comparison Guide
| Model |
Measurement Type |
Pressure Range |
Mounting Style |
Key Features |
| 3051CD |
Differential Pressure |
±0.1 inH₂O to ±2000 psi |
Coplanar™ |
High accuracy (±0.04%), 10-year stability, ideal for flow/level applications |
| 3051CG |
Gage Pressure |
Up to 2000 psi |
Coplanar™ |
Measures pressure relative to the atmosphere, same platform as CD |
| 3051CA |
Absolute Pressure |
Up to 4000 psia |
Coplanar™ |
For vacuum or sealed systems, use a piezoresistive sensor |
| 3051T |
Gage/Absolute Pressure |
Up to 10,000 psi |
In-Line |
Compact, rugged, ideal for high-pressure pipelines |
| 3051L |
Level (DP-based) |
Up to 300 psi |
Direct/Remote Mount |
Tuned-System™ assemblies for tanks include capillary options |
| 3051CF |
Flow (DP-based) |
Application-specific |
Integrated w/Primary |
Combines DP transmitter with flow element (e.g., Annubar™, orifice plate) |
Selection Tips
- Choose 3051CD for most differential pressure needs, especially when integrating with manifolds or measuring flow.
- Use 3051T when space is tight or pressure is extreme.
- Opt for 3051L when measuring level in pressurized or vacuum tanks.
- For flow-specific setups, 3051CF offers a pre-engineered, leak-tested solution.
| 5 |
Coplanar electroplated carbon steel SST electroplated carbon steel |
-- |
-- |
-- |
| 2 |
Coplanar SST SST SST |
-- |
-- |
-- |
| 3(2) |
Coplanar Hastelloy C Hastelloy C Hastelloy C |
-- |
-- |
-- |
| 4 |
Coplanar Monel Monel Monel |
-- |
-- |
-- |
| 8(2) |
Coplanar electroplated carbon steel, Hastelloy C, electroplated carbon steel |
-- |
-- |
-- |
| 7(2) |
Coplanar SST Hastelloy C SST |
-- |
-- |
-- |
| 0 |
Alternative flange - see options H2H3H4H7F1F2G1G2FAFBFCFD or S5 |
|
|
|
| code |
Isolation Diaphragm |
CD |
CG |
CA |
| 5 |
316L SST |
-- |
-- |
-- |
| 2 |
Hastelloy C-276 |
-- |
-- |
-- |
| 3(2) |
Monel |
-- |
-- |
-- |
| 4 |
Tantalum (only applicable to 3051CD and CG models, range 2-5. Not applicable to 3051CA model) |
-- |
-- |
-- |
| 5 |
Gilded Monel |
-- |
-- |
-- |
| 6 |
|
|
|
|
| code |
0-type ring |
CD |
CG |
CA |
| A |
Glass-filled tetrafluoroethylene (TFE) |
-- |
-- |
-- |
| B |
Graphite-filled tetrafluoroethylene (TFE) |
-- |
-- |
-- |
| code |
Fill liquid |
CD |
CG |
CA |
| 1 |
silicone oil |
-- |
-- |
-- |
| 2 |
Inert liquid (halogenated hydrocarbon) |
-- |
-- |
-- |
| code |
Shell material, conduit inlet size |
CD |
CG |
CA |
| A |
Aluminum, coated with polyurethane coating 1/2-14NPT |
-- |
-- |
-- |
| B |
Aluminum, coated with polyurethane M2x1.5 (CM20) |
-- |
-- |
-- |
| C |
Aluminum, coated with polyurethane PG13.5 |
-- |
-- |
-- |
| D |
Aluminum, coated with polyurethane G 1/2 |
-- |
-- |
-- |
| J |
SST 1/2-14NPT |
-- |
-- |
-- |
| K |
SST M2x1.5 (CM20) |
-- |
-- |
-- |
| L |
SST PG13.5 |
-- |
-- |
-- |
Specialized Use Cases
| Industry |
Application Example |
| Pharmaceutical |
Cleanroom pressure control, isolator monitoring |
| Semiconductor |
Ultra-low-pressure air handling and exhaust systems |
| Food & Beverage |
CIP system pressure monitoring, tank level measurement |
| Oil & Gas |
Flow measurement in gas pipelines, separator level control |
| Water/Wastewater |
Filter monitoring, aeration system control |
| Power Generation |
Boiler drum level, feedwater flow |
Rosemount 3051CD – Frequently Asked Questions
1. What does the 3051CD measure?
It measures differential pressure (ΔP)—the difference between two pressure points—commonly used for flow, level, and filter monitoring.
2. What’s the accuracy of the 3051CD?
Standard accuracy is ±0.075% of span, with options as tight as ±0.04% for high-performance applications.
3. What is the pressure range?
It covers a wide range from ±0.1 inH₂O to ±2000 psi, depending on the selected sensor range.
4. What communication protocols are supported?
- 4–20 mA with HART®
- FOUNDATION™ Fieldbus
- WirelessHART® (optional)
5. What is Coplanar™ technology?
It’s Emerson’s patented design that allows for compact, integrated mounting with manifolds and seals—ideal for space-saving and modular installations.
6. Can it be used in hazardous environments?
Yes. It’s certified for use in explosion-proof, intrinsically safe, and non-incendive environments (ATEX, IECEx, FM, CSA, etc.).
7. How stable is it over time?
It offers 10-year stability of ±0.2% of URL, reducing recalibration needs and maintenance costs.
8. What diagnostics are built in?
- Loop Integrity Check
- Plugged Impulse Line Detection
- Process Alerts for early issue detection
9. What materials are available for wetted parts?
Standard is 316L stainless steel, with options like Alloy C-276, Tantalum, or Gold-plated materials for corrosive media.
10. How do I install and configure it?
It can be configured via a HART communicator, AMS Device Manager, or Field Communicator. Installation requires proper impulse line routing and electrical grounding per the manual.
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