3051CD Hart Pressure Transmitter
Introduction:
The Rosemount 3051CD Differential Pressure Transmitter delivers high-precision measurement and dependable performance across demanding industrial applications. Engineered with advanced HART® communication, it offers ±0.04% span accuracy, long-term stability, and intelligent diagnostics for flow, level, and pressure monitoring. Its compact Coplanar™ design streamlines installation, while optional Bluetooth® and WirelessHART® connectivity enable efficient remote configuration and system integration.
Technical Parameters:
| Feature / Model |
3051CD (Differential) |
3051CG (Gauge) |
3051CA (Absolute) |
3051S (SuperModule) |
| Measurement Type |
Differential Pressure |
Gauge Pressure |
Absolute Pressure |
All types (DP, GP, AP) |
| Reference Accuracy |
±0.04% of span |
±0.04% of span |
±0.04% of span |
±0.025% of span |
| Stability (10 years) |
±0.2% of URL |
±0.2% of URL |
±0.2% of URL |
±0.125% of URL |
| Rangeability (Turndown) |
Up to 150:1 |
Up to 150:1 |
Up to 150:1 |
Up to 200:1 |
| Output Protocols |
4–20 mA HART, Wireless |
4–20 mA HART |
4–20 mA HART |
HART, FOUNDATION Fieldbus, Wireless |
| Coplanar™ Platform |
✅ |
✅ |
✅ |
✅ |
| Bluetooth® Option |
✅ |
✅ |
✅ |
✅ |
| Diagnostics |
Loop Integrity, Plugged Line |
Same |
Same |
Advanced + Power Advisory |
| Display Option |
Graphical LCD (M6) |
Same |
Same |
Enhanced LCD |
| SIL Certification |
SIL 2/3 |
SIL 2/3 |
SIL 2/3 |
SIL 2/3 |
| Best Use Cases |
Flow, Level, Filter Monitoring |
Tank Pressure, Pump Control |
Vacuum Systems, Reactors |
High-accuracy critical apps |
Selection Tips
- Choose 3051CD for low differential pressure applications like filter monitoring or flow across orifice plates.
- Use 3051CG when measuring gauge pressure in tanks or pipelines.
- Opt for 3051CA for absolute pressure in vacuum or sealed systems.
- Select 3051S when ultra-high accuracy, diagnostics, or scalability are critical.
| 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 “3051CD” stand for?
“C” refers to the Coplanar™ platform, and “D” indicates Differential Pressure measurement.
2. What is the accuracy of the 3051CD?
It offers ±0.04% of span reference accuracy for high-precision applications.
3. What is the long-term stability?
The transmitter maintains ±0.2% of URL over 10 years.
4. Which output protocols are available?
Standard 4–20 mA HART®, with optional WirelessHART® and Bluetooth® connectivity.
5. Can it measure air differential pressure?
Yes, especially the 3051CD0 model, which is optimized for HVAC, cleanroom, and filter monitoring.
6. What pressure ranges are supported?
Ranges span from ±3 inH₂O to ±2000 psi, depending on the selected range code.
7. What’s the recommended mounting for low-pressure air?
Mount the unit horizontally with isolators parallel to the ground for best accuracy.
8. What diagnostics are included?
Loop Integrity and Plugged Impulse Line Detection are built in for proactive maintenance.
9. Is it certified for safety systems?
Yes, it’s SIL 2/3 certified and suitable for use in Safety Instrumented Systems (SIS).
10. What materials are available for wetted parts?
316L SST, Alloy C-276, Tantalum, and other corrosion-resistant options.
11. What is the weight of the transmitter?
Approximately 5.7 lbs (2.6 kg), excluding mounting hardware.
12. Does it include a serial number?
Yes, each unit has a unique serial number engraved on the nameplate and accessible via HART® tools.
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