Emerson (Rosemount, Micro Motion) · Pressure Transmitters
Rosemount 3051CD Differential Pressure Transmitter
Part number 3051CD2A22A1AB4M5E5
Coplanar DP transmitter, range 2 (0–623 mbar), ±0.04 % accuracy, 4–20 mA HART 7, LCD, Ex d, SIL2/3 — the industry reference for DP flow and level.
- CE
- ATEX
- IECEx
- SIL2
- HART 7
Overview
The Rosemount 3051C Coplanar is the most widely installed differential-pressure transmitter in the world, and the 3051CD2 is its mid-range version for DP flow, level and filter applications up to 623 mbar span. Standard reference accuracy is ±0.04 % of span (±0.025 % with the high-accuracy option) over a 100:1 turndown, with five-year stability of ±0.2 % of URL. The Coplanar flange mounts directly on Rosemount 305 integral manifolds, reducing leak points and installation time. The example model string is a 316L/Hastelloy diaphragm unit with LCD (M5) and ATEX flameproof (E5); we build the string with you for approvals, manifolds and process seals.
Key features
- Reference accuracy ±0.04 % of span (±0.025 % option), 100:1 turndown, 5-year stability
- Coplanar platform with integral 305 manifold and 1199 seal options
- Ranges 1 to 5 (0–62 mbar up to 0–137.9 bar) in one family
- 4–20 mA HART 7 (option: FOUNDATION Fieldbus, PROFIBUS PA, 1–5 V low power)
- SIL2/3 certified; ATEX, IECEx, FM, CSA, NEPSI flameproof and intrinsically safe
Typical applications
- Orifice-plate and Venturi flow measurement
- Differential level in pressurized vessels and boiler drums
- Filter differential and pump protection
- Safety instrumented systems
Technical specifications — 3051CD2A22A1AB4M5E5
| Measurement | |
|---|---|
| Measuring principle | Capacitance cell, Coplanar |
| Range 2 span | 0–623 mbar (0.62 to 623 mbar) |
| Reference accuracy | ±0.04 % of span (±0.025 % option) |
| Turndown | 100:1 |
| Static pressure limit | 250 bar (range 2) |
| Output | |
| Signal | 4–20 mA HART 7 (FF, PROFIBUS PA, 1–5 V options) |
| Display | LCD (option M5) |
| Power | 10.5–42.4 V DC |
| Process | |
| Process temperature | -40…+121 °C (silicone fill) |
| Process connection | Coplanar flange, 1/4-18 NPT; 305/306 manifolds |
| Wetted materials | 316L SST, Hastelloy C-276, Monel, tantalum diaphragms |
| Environment | |
| Ambient temperature | -40…+85 °C |
| Enclosure | IP66/68, aluminium or 316L housing |
Specifications are summarised from the manufacturer's documentation for selection purposes. Always confirm against the current datasheet before design-in; we send the datasheet and the exact ordering code with every quotation.
Related part numbers and alternatives
| Part number | Relationship | |
|---|---|---|
3051S | Rosemount 3051S SuperModule — scalable diagnostics, ±0.025 % and 200:1 turndown | Quote |
3051CG | Gauge-pressure version on the same Coplanar platform | Quote |
2051CD | Rosemount 2051 — lower-cost option with ±0.065 % accuracy | Quote |
Not sure which variant you need? Send us the nameplate photo or the old part number and we will identify the current equivalent.
Supply, documentation and lead time
What you receive
- Genuine Emerson (Rosemount, Micro Motion) product in original packaging
- Commercial invoice and packing list; Certificate of Conformance on request
- Datasheet, declaration of conformity and country of origin as issued by the manufacturer
- Manufacturer warranty, period stated on the quotation
How we quote
- Reply within one business day with price, lead time and stock position
- Alternatives proposed when they improve price or delivery
- Incoterms of your choice: EXW Hai Phong, FOB/FCA, CIF/DAP to your site
- Consolidated shipments for multi-line orders; export documentation for buyers outside Vietnam
Indicative HS code 9026.20 — final classification is confirmed on the commercial invoice.
Frequently asked questions
What is the difference between the Rosemount 3051C and 3051S?
The 3051S is the premium "scalable" platform with a hermetic SuperModule, better accuracy and advanced diagnostics such as plugged impulse line detection. The 3051C covers the majority of loops at lower cost; we quote both when the specification allows.
Can you supply the 3051CD with an integral manifold and diaphragm seals?
Yes. The model string includes 305 or 306 manifolds and 1199 remote seals assembled and tested at the factory, which is the preferred way to avoid field leaks.
Is the Rosemount 3051CD available from stock, and what is the lead time?
Standard ranges with HART and common approvals are typically 4–8 weeks; Emerson's quick-ship programme covers some configurations in under two weeks. We confirm with the quotation.