High Accuracy Differential Sensor Pressure Indicator Transmitter
The Rosemount 3051C High Accuracy Differential Sensor Pressure Indicator Transmitter delivers exceptional performance in demanding industrial environments. Engineered for precision, it provides reliable differential pressure measurement with advanced stability and repeatability. Its rugged, explosion-proof housing ensures durability in harsh conditions, while the integrated digital display offers clear, real-time readings. With global certifications and proven compatibility across process industries, the 3051C is the trusted choice for optimizing safety, efficiency, and control in critical applications.
| Feature / Model |
Rosemount 3051C |
Rosemount 3051T |
Rosemount 3051S |
| Measurement Type |
Differential, Gauge, Absolute |
Gauge or Absolute only |
Differential, Gauge, Absolute |
| Accuracy |
±0.075% of span (standard) |
±0.1% of span |
Up to ±0.025% of span (Ultra performance) |
| Stability |
0.1% of URL for 2 years |
0.2% of URL for 2 years |
0.025% of URL for 5 years |
| TurnDown Ratio |
Up to 100:1 |
Up to 50:1 |
Up to 200:1 |
| Output |
4–20 mA with HART®, optional FOUNDATION Fieldbus / Profibus |
4–20 mA with HART® |
4–20 mA with HART®, FOUNDATION Fieldbus, Profibus, WirelessHART® |
| Display |
Optional LCD indicator |
Optional LCD indicator |
Advanced LCD with diagnostics |
| Housing |
Explosion-proof, watertight |
Compact, lightweight |
Rugged, premium housing with diagnostics |
| Best Application Fit |
General-purpose, multi-variable, flow/level integration |
Cost-effective, simpler applications (water, F&B, utilities) |
High-end critical processes (oil & gas, refining, chemical) |
| Certifications |
CE, ATEX, FM, CSA, IECEx |
CE, ATEX, FM |
CE, ATEX, FM, CSA, IECEx, SIL 2/3 capable |
Product Selection Table:
| model |
Type of transmitter (choose one) |
CD |
CG |
CA |
| 3051CD 3051CG 3051CA |
Differential pressure transmitter Gauge pressure transmitter Absolute pressure transmitter |
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| code |
Pressure range (URL) (choose one)
3051CD type 3051CG type 3051CA type |
CD |
CG |
CA |
| 0 |
Not provided 0-0.167to0-5psia
(0-8.6to0-260mmHga) |
-- |
-- |
-- |
| 1 |
0-0.5to0-25inH20 Not provided 0-0.3to0-30psia
(0-2.07to0-206.8kPa) (0-2.07to0-206.8kPa) |
-- |
-- |
-- |
| 2 |
0-2.5to0-250inH200-2.5to0-250inH200-1.5to0-150psia
(0-0.62to0-62.2kPa)(0-0.62to0-62.2kPa)(0-10.34to0-1034.2kPa) |
-- |
-- |
-- |
| 3 |
0-10to0-1000inH200-10to0-1000inH200-8to0-800psia
(0-2.48to0-248kPa)(0-2.48to0-248kPa)(0-55.16to0-5515.8kPa) |
-- |
-- |
-- |
| 4 |
0-3to0-300 psi 0-3to0-300 psi 0-40to0-4000 psi
(0-20.7to0-2070kPa)(0-20.7to0-2070kPa)(0-275.8to0-27580kPa) |
-- |
-- |
-- |
| 5 |
0-20 to 0-2000 psi 0-200 to 0-2000 psi
(0-138 to 0-13800kPa) (0-138 to 0-13800kPa) |
-- |
-- |
-- |
| code |
output |
CD |
CG |
CA |
A
M(1) |
4-20mA, with a digital signal based on the HART protocol
Low power consumption, 1-5VDC with digital signal based on HART protocol (0.8-3.2Vdc, using option code C2) Not provided |
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Applications:
| Configuration Suffix |
Range Code 1 |
Range Code 2 |
Range Code 3 |
Range Code 4 |
Range Code 5 |
| A02A1AB1H2L4M5 |
3051CG1A02A1AB1H2L4M5 |
3051CG2A02A1AB1H2L4M5 |
3051CG3A02A1AB1H2L4M5 |
3051CG4A02A1AB1H2L4M5 |
3051CG5A02A1AB1H2L4M5 |
| A02A1AB3H2L4M5 |
3051CG1A02A1AB3H2L4M5 |
3051CG2A02A1AB3H2L4M5 |
3051CG3A02A1AB3H2L4M5 |
3051CG4A02A1AB3H2L4M5 |
3051CG5A02A1AB3H2L4M5 |
| A02A1AB1H2L4M5K5 |
3051CG1A02A1AB1H2L4M5K5 |
3051CG2A02A1AB1H2L4M5K5 |
3051CG3A02A1AB1H2L4M5K5 |
3051CG4A02A1AB1H2L4M5K5 |
3051CG5A02A1AB1H2L4M5K5 |
| A02A1AB1H2L4M5E5 |
3051CG1A02A1AB1H2L4M5E5 |
3051CG2A02A1AB1H2L4M5E5 |
3051CG3A02A1AB1H2L4M5E5 |
3051CG4A02A1AB1H2L4M5E5 |
3051CG5A02A1AB1H2L4M5E5 |
| A02A1AB1H2L4M5I5 |
3051CG1A02A1AB1H2L4M5I5 |
3051CG2A02A1AB1H2L4M5I5 |
3051CG3A02A1AB1H2L4M5I5 |
3051CG4A02A1AB1H2L4M5I5 |
3051CG5A02A1AB1H2L4M5I5 |
| A02A1AB3H2L4M5K5 |
3051CG1A02A1AB3H2L4M5K5 |
3051CG2A02A1AB3H2L4M5K5 |
3051CG3A02A1AB3H2L4M5K5 |
3051CG4A02A1AB3H2L4M5K5 |
3051CG5A02A1AB3H2L4M5K5 |
| A02A1AB3H2L4M5E5 |
3051CG1A02A1AB3H2L4M5E5 |
3051CG2A02A1AB3H2L4M5E5 |
3051CG3A02A1AB3H2L4M5E5 |
3051CG4A02A1AB3H2L4M5E5 |
3051CG5A02A1AB3H2L4M5E5 |
| A02A1AB3H2L4M5I5 |
3051CG1A02A1AB3H2L4M5I5 |
3051CG2A02A1AB3H2L4M5I5 |
3051CG3A02A1AB3H2L4M5I5 |
3051CG4A02A1AB3H2L4M5I5 |
3051CG5A02A1AB3H2L4M5I5 |
| A22A1AB4M5 |
3051CG1A22A1AB4M5 |
3051CG2A22A1AB4M5 |
3051CG3A22A1AB4M5 |
3051CG4A22A1AB4M5 |
3051CG5A22A1AB4M5 |
| A22A1AB4M5DF |
3051CG1A22A1AB4M5DF |
3051CG2A22A1AB4M5DF |
3051CG3A22A1AB4M5DF |
3051CG4A22A1AB4M5DF |
3051CG5A22A1AB4M5DF |
| A22A1AB4M5K5 |
3051CG1A22A1AB4M5K5 |
3051CG2A22A1AB4M5K5 |
3051CG3A22A1AB4M5K5 |
3051CG4A22A1AB4M5K5 |
3051CG5A22A1AB4M5K5 |
| A22A1AB4M5E5 |
3051CG1A22A1AB4M5E5 |
3051CG2A22A1AB4M5E5 |
3051CG3A22A1AB4M5E5 |
3051CG4A22A1AB4M5E5 |
3051CG5A22A1AB4M5E5 |
| A22A1AB4M5I5 |
3051CG1A22A1AB4M5I5 |
3051CG2A22A1AB4M5I5 |
3051CG3A22A1AB4M5I5 |
3051CG4A22A1AB4M5I5 |
3051CG5A22A1AB4M5I5 |
Applications of Rosemount 3051CG High Accuracy Differential Pressure Transmitters
- Flow Measurement Used with primary elements such as orifice plates, Venturi tubes, or pitot tubes to calculate flow rates in liquids, gases, and steam. The high accuracy and stability of the 3051CG ensure reliable flow monitoring in critical process lines.
- Level Measurement Applied in pressurized or vented tanks to measure liquid levels by detecting differential pressure between the top and bottom of the vessel. Ideal for storage tanks, separators, and reactors.
- Pressure Monitoring Provides precise gauge or differential pressure readings for pipelines, compressors, and filtration systems, ensuring safe and efficient operation.
- Process Control & Safety Integrated into distributed control systems (DCS) or safety instrumented systems (SIS) to maintain process stability, detect abnormal conditions, and trigger protective actions.
- Energy & Utility Management Widely used in power plants, refineries, and chemical plants to optimize steam distribution, fuel gas flow, and water treatment processes.
FAQ – Rosemount 3051CG Differential Pressure Transmitter
Q1. What is the Rosemount 3051CG used for?
The 3051CG is designed for accurate measurement of differential, gauge, or absolute pressure. It is commonly applied in flow, level, and pressure monitoring across industries such as oil & gas, chemical, power, and water treatment.
Q2. What is the accuracy of the 3051CG?
It offers up to ±0.075% of span accuracy as standard, with excellent long-term stability, making it suitable for critical process control applications.
Q3. What communication protocols are supported?
The transmitter supports 4–20 mA with HART® as standard, with options for FOUNDATION Fieldbus and Profibus PA depending on configuration.
Q4. Can the 3051CG be used in hazardous areas?
Yes. The housing is explosion-proof and watertight, and the device is certified to global standards such as ATEX, FM, CSA, and IECEx.
Q5. What are the typical applications?
- Flow measurement with primary elements (orifice plates, Venturi tubes, pitot tubes)
- Liquid level measurement in pressurized or vented tanks
- Pipeline and compressor pressure monitoring
- Process safety and control integration
Q6. What display options are available?
An optional LCD indicator provides local, real-time pressure readings and configuration data.
Q7. How do I select the correct model code?
Model codes (e.g., 3051CG1A02A1AB1H2L4M5) define range, output, housing, mounting, and options. Selection depends on application requirements such as pressure range, process connection, and certification needs.
Q8. What is the difference between 3051C, 3051CG, and 3051T?
- 3051C: General-purpose differential/gauge/absolute pressure transmitter.
- 3051CG: Gauge pressure variant within the 3051C family, optimized for gauge applications.
- 3051T: Gauge/absolute pressure transmitter, typically lower cost and simpler than 3051C/CG.
Q9. What maintenance is required?
The 3051CG is designed for long-term stability with minimal recalibration. Routine verification and inspection are recommended based on plant standards.
Q10. Does it support SIL (Safety Integrity Level) applications?
Yes, certain configurations are SIL 2/3 capable, making them suitable for safety instrumented systems.
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