New Original 3051CG Air Pressure Transmitter
The Rosemount 3051CG is a high-performance gauge pressure transmitter designed for precise air and gas pressure measurement in industrial environments. Built on Emerson’s Coplanar™ platform, it offers exceptional flexibility, long-term stability, and advanced diagnostics. With output options like 4–20 mA HART®, Fieldbus, and WirelessHART®, it supports seamless integration into both legacy and modern systems.
Ideal for applications in manufacturing, energy, and chemical processing, the 3051CG delivers ±0.04% reference accuracy and up to 10 years of stability, making it a trusted choice for reliable, maintenance-friendly pressure monitoring.
Specifications:
| Feature / Model | 3051CG (Gauge) | 3051CD (Differential) | 3051HT (Hygienic) |
|---|---|---|---|
| Measurement Type | Gauge pressure (vs. atmosphere) | Differential pressure (between two points) | Gauge or absolute pressure (sanitary design) |
| Platform | Coplanar™ | Coplanar™ | In-line hygienic |
| Typical Applications | Air/gas pressure, general process control | Flow, level, and filter monitoring | Food, beverage, and pharmaceutical |
| Accuracy | ±0.04% of span | ±0.04% of span | ±0.1% of span |
| Stability | ±0.2% of URL over 10 years | ±0.2% of URL over 10 years | ±0.25% of URL over 5 years |
| Output Options | 4–20 mA HART®, Fieldbus, WirelessHART® | 4–20 mA HART®, Fieldbus, WirelessHART® | 4–20 mA HART®, FOUNDATION™ Fieldbus |
| Certifications | SIL 2/3, explosion-proof, Bluetooth® option | SIL 2/3, explosion-proof, Bluetooth® option | 3-A, EHEDG, FDA-compliant materials |
| Process Connections | Standard threaded or flanged | Coplanar manifold compatible | Tri-Clamp®, hygienic fittings |
| Pressure Range | Up to 6000 psi (413 bar) | Up to 2000 psi (138 bar) differential | Up to 300 psi (20.7 bar) |
Selection Tips
- Choose 3051CG for general-purpose air/gas pressure monitoring.
- Use 3051CD when you need to measure pressure differences (e.g., across filters or orifice plates).
- Opt for 3051HT in sanitary or clean-in-place (CIP) environments.
Applications:
Packing:
Frequently Asked Questions – Rosemount 3051CG
1. What type of pressure does the 3051CG measure?
The 3051CG measures gauge pressure, which is the pressure relative to atmospheric pressure.
2. What is the accuracy of the 3051CG?
It offers up to ±0.04% of span reference accuracy, making it ideal for precision-critical applications.
3. What output protocols are supported?
- 4–20 mA HART®
- FOUNDATION™ Fieldbus
- Profibus®
- WirelessHART®
- Low-power voltage output (select models)
4. What is the maximum pressure range?
Depending on the range code, it can measure up to 6000 psi (413 bar).
5. What’s the difference between the 3051CG and 3051CA?
-
3051CG: Measures gauge pressure using a capacitance sensor.
-
3051CA: Measures absolute pressure using a piezoresistive silicon sensor.
6. How much does the 3051CG weigh?
Approximately 5.7 lbs (2.6 kg) without mounting brackets.
7. Can it be used in hazardous environments?
Yes, it has multiple certifications, including SIL 2/3, explosion-proof, and intrinsically safe approvals.
8. What mounting options are available?
It supports Coplanar™ flange, traditional flange, and 2-inch pipe mounting with optional brackets.
9. How often does it need recalibration?
Thanks to its ±0.2% URL stability over 10 years, recalibration frequency can be significantly reduced.
10. Is Bluetooth® configuration available?
Yes, select models offer Bluetooth® connectivity for wireless setup and diagnostics.
Models of 3051CG Transmitters:
| Model Code | Range Code | Process Conn. | Options |
|---|---|---|---|
| 3051CG1A02A1AB1H2L4M5 | 1 | B1 | L4M5 |
| 3051CG2A02A1AB1H2L4M5 | 2 | B1 | L4M5 |
| 3051CG3A02A1AB1H2L4M5 | 3 | B1 | L4M5 |
| 3051CG4A02A1AB1H2L4M5 | 4 | B1 | L4M5 |
| 3051CG5A02A1AB1H2L4M5 | 5 | B1 | L4M5 |
| 3051CG1A02A1AB3H2L4M5 | 1 | B3 | L4M5 |
| 3051CG2A02A1AB3H2L4M5 | 2 | B3 | L4M5 |
| 3051CG3A02A1AB3H2L4M5 | 3 | B3 | L4M5 |
| 3051CG4A02A1AB3H2L4M5 | 4 | B3 | L4M5 |
| 3051CG5A02A1AB3H2L4M5 | 5 | B3 | L4M5 |
| 3051CG1A02A1AB1H2L4M5K5 | 1 | B1 | L4M5K5 |
| 3051CG2A02A1AB1H2L4M5K5 | 2 | B1 | L4M5K5 |
| 3051CG3A02A1AB1H2L4M5K5 | 3 | B1 | L4M5K5 |
| 3051CG4A02A1AB1H2L4M5K5 | 4 | B1 | L4M5K5 |
| 3051CG5A02A1AB1H2L4M5K5 | 5 | B1 | L4M5K5 |
| 3051CG1A02A1AB1H2L4M5E5 | 1 | B1 | L4M5E5 |
| 3051CG2A02A1AB1H2L4M5E5 | 2 | B1 | L4M5E5 |
| 3051CG3A02A1AB1H2L4M5E5 | 3 | B1 | L4M5E5 |
| 3051CG4A02A1AB1H2L4M5E5 | 4 | B1 | L4M5E5 |
| 3051CG5A02A1AB1H2L4M5E5 | 5 | B1 | L4M5E5 |
| 3051CG1A02A1AB1H2L4M5I5 | 1 | B1 | L4M5I5 |
| 3051CG2A02A1AB1H2L4M5I5 | 2 | B1 | L4M5I5 |
| 3051CG3A02A1AB1H2L4M5I5 | 3 | B1 | L4M5I5 |
| 3051CG4A02A1AB1H2L4M5I5 | 4 | B1 | L4M5I5 |
| 3051CG5A02A1AB1H2L4M5I5 | 5 | B1 | L4M5I5 |
| 3051CG1A02A1AB3H2L4M5K5 | 1 | B3 | L4M5K5 |
| 3051CG2A02A1AB3H2L4M5K5 | 2 | B3 | L4M5K5 |
| 3051CG3A02A1AB3H2L4M5K5 | 3 | B3 | L4M5K5 |
| 3051CG4A02A1AB3H2L4M5K5 | 4 | B3 | L4M5K5 |
| 3051CG5A02A1AB3H2L4M5K5 | 5 | B3 | L4M5K5 |
| 3051CG1A02A1AB3H2L4M5E5 | 1 | B3 | L4M5E5 |
| 3051CG2A02A1AB3H2L4M5E5 | 2 | B3 | L4M5E5 |
| 3051CG3A02A1AB3H2L4M5E5 | 3 | B3 | L4M5E5 |
| 3051CG4A02A1AB3H2L4M5E5 | 4 | B3 | L4M5E5 |
| 3051CG5A02A1AB3H2L4M5E5 | 5 | B3 | L4M5E5 |
| 3051CG1A02A1AB3H2L4M5I5 | 1 | B3 | L4M5I5 |
| 3051CG2A02A1AB3H2L4M5I5 | 2 | B3 | L4M5I5 |
| 3051CG3A02A1AB3H2L4M5I5 | 3 | B3 | L4M5I5 |
| 3051CG4A02A1AB3H2L4M5I5 | 4 | B3 | L4M5I5 |
| 3051CG5A02A1AB3H2L4M5I5 | 5 | B3 | L4M5I5 |
| 3051CG1A22A1AB4M5 | 1 | B4 | M5 |
| 3051CG2A22A1AB4M5 | 2 | B4 | M5 |
| 3051CG3A22A1AB4M5 | 3 | B4 | M5 |
| 3051CG4A22A1AB4M5 | 4 | B4 | M5 |
| 3051CG5A22A1AB4M5 | 5 | B4 | M5 |
| 3051CG1A22A1AB4M5DF | 1 | B4 | M5DF |
| 3051CG2A22A1AB4M5DF | 2 | B4 | M5DF |
| 3051CG3A22A1AB4M5DF | 3 | B4 | M5DF |
| 3051CG4A22A1AB4M5DF | 4 | B4 | M5DF |
| 3051CG5A22A1AB4M5DF | 5 | B4 | M5DF |
| 3051CG1A22A1AB4M5K5 | 1 | B4 | M5K5 |
| 3051CG2A22A1AB4M5K5 | 2 | B4 | M5K5 |
| 3051CG3A22A1AB4M5K5 | 3 | B4 | M5K5 |
| 3051CG4A22A1AB4M5K5 | 4 | B4 | M5K5 |
| 3051CG5A22A1AB4M5K5 | 5 | B4 | M5K5 |
| 3051CG1A22A1AB4M5E5 | 1 | B4 | M5E5 |
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