Brand: Rosemount, Emerson

Rosemount 3051 Pressure Transmitter

Name: Rosemount 3051 Pressure Transmitter – Emerson
Brand: Rosemount

Description

Overview

The Emerson Rosemount 3051 Pressure Transmitter family sets a benchmark for reliable pressure measurement across differential (DP), gauge (GP), and absolute (AP) applications. Built on Emerson’s robust architecture, 3051 transmitters combine high accuracy, fast step response, and outstanding long-term stability, making them a favorite for flow (with primary elements), level (wet/dry leg), density/DP and general pressure duties in oil & gas, chemicals, power generation, water & wastewater, marine and utilities. Standard output is 4–20 mA with HART® for universal DCS/PLC integration; digital protocols are available on related 3051 variants if your architecture requires them.

Key Benefits

Accuracy & stability you can trust: Tight reference accuracy and excellent long-term stability reduce recalibration intervals and lifecycle cost.
Fast dynamics: Quick response supports tighter control on flow and steam loops.
Versatile measurement types: Configure as DP for flow/level/density, GP for line pressure, or AP for absolute pressure.
Broad range & materials: Multiple capsule ranges, wetted materials and process connections suit harsh media and temperature/pressure envelopes.
Seamless integration: 4–20 mA + HART fits legacy and modern systems; diagnostics aid loop checks and maintenance.
Scalable platform: From basic pressure duty to advanced assemblies with remote seals and local displays—3051 adapts to your spec.

Typical Applications

Flow measurement (DP): Pair with orifice/venturi/Annubar/averaging pitot tubes; enable square-root extraction in the DCS/flow computer for volumetric/mass flow.
Level on pressurized vessels: Wet/dry leg DP configurations for columns, drums and tanks (including steam and condensate service).
Line pressure (GP) and absolute pressure (AP) in process and utilities.
Density/DP monitoring for separators and process optimization.

Communication & Integration

Output: 4–20 mA DC with HART® (standard).
Device diagnostics: Advanced device/status diagnostics via HART help identify loop issues or plugged impulse lines (availability by model/options).
Digital ecosystems: If your site requires FOUNDATION™ Fieldbus / PROFIBUS® PA, specify the appropriate 3051 variant; we’ll validate codes.

Construction, Ranges & Materials

Capsule ranges: Wide selection from low DP up to high ranges for steam/HP gas.
Wetted materials: Stainless steels and optional corrosion-resistant alloys to match medium.
Process connections: NPT/Threaded, flanged, and remote seals (single/dual capillary) for hot, viscous or plugging services.
Local indicator: Optional display for on-site commissioning and live variables.

Installation & Commissioning Tips

Impulse lines: Keep runs short and symmetrical for DP flow; slope toward the transmitter on liquid service and away on gas service to avoid condensate pooling.
Wet leg care (level): Use compatible fill fluid and keep temperature exposure consistent; insulate where needed to minimize drift.
Square-root extraction: Decide whether to apply √ in transmitter, DCS or flow computer (e.g., FloBoss S600+ or ABB Flow-X)—we can align with your metering standard.
Damping & filtering: Set damping to smooth noise but preserve control responsiveness; verify update rate in the host.

Why Seven Star LLC

Genuine Emerson supply with quick lead times.
Model code guidance: We help choose capsule/range, wetted materials, process connections, remote seals and approvals.
Commissioning support: HART setup, scaling, damping and loop checks; flow/level strategy alignment with your DCS or flow computer.
Documentation pack: Datasheets, material certificates and wiring notes on request.

Rosemount 3051 FAQ

Is the Rosemount 3051 a differential pressure (DP) transmitter?

Yes. The 3051 platform covers differential (DP), gauge (GP) and absolute (AP) pressure. The 3051C Coplanar is the usual choice for DP flow and level duty, with 4–20 mA HART as the standard output.

What is the difference between 3051C, 3051T and 3051L?

3051C is the Coplanar layout for DP, gauge and absolute pressure; 3051T is the in-line single-port version for gauge or absolute pressure; 3051L is the flange-mounted version for liquid level without impulse piping.

What does a 3051TG pressure transmitter mean?

3051TG is the in-line gauge pressure version (3051T, gauge). It threads straight onto the process and measures pressure relative to atmosphere, typically for line and pump discharge pressure.

Can the 3051 be used for flow measurement?

Yes. Paired with an orifice plate, venturi or averaging pitot tube, it measures DP, and the square-root extraction is applied in either the transmitter or the DCS/flow computer, never both.

What information do you need to quote a Rosemount 3051?

Send the full model string from the nameplate, or the medium, range, process temperature and pressure, wetted material, process connection, display and protocol. We validate the code and confirm lead time before quoting.

Request a Quote for Rosemount 3051 Pressure Transmitter

Request a quote—Share your medium (liquid/gas/steam), DP/pressure range, process temp/pressure, wetted material, process connection, display/remote-seal need and protocol. We’ll validate the exact 3051 build, confirm lead time, and ship with the right accessories.

Technical Specifications

Parameter	Value
Manufacturer	Emerson
Product Family	Rosemount 3051 Pressure Transmitter
Measurement Types	Differential (DP), gauge (GP) and absolute (AP) pressure
Model Variants	3051C (Coplanar), 3051T (In-line), 3051L (Liquid level)
Output	4–20 mA DC with HART (standard)
Optional Protocols	FOUNDATION Fieldbus / PROFIBUS PA (separate output options)
Wetted Materials	Stainless steels and optional corrosion-resistant alloys
Process Connections	NPT/threaded, flanged, and remote seals (single/dual capillary)
Local Indicator	Optional display
Reference accuracy, 3051C Ranges 2-4	±0.04% of span
Reference accuracy, 3051C Range 5 / Range 1 / Range 0	±0.065% / ±0.10% / ±0.10% of span
Reference accuracy, 3051T	±0.04% of span (Ranges 0-4); ±0.075% of span (Ranges 5-6)
Reference accuracy, 3051L	±0.075% of span (Ranges 2-4)
Total performance, 3051C Ranges 2-5	±0.14% of span (for ±28 °C change, 1:1 to 5:1 rangedown)
Long-term stability	±0.2% of URL for 10 years (3051C Ranges 2-5; 3051T Ranges 1-4)
3051CD upper range limits	Range 0: 3 inH2O (7.45 mbar); 1: 25 inH2O (62.16 mbar); 2: 250 inH2O (621.6 mbar); 3: 1000 inH2O (2.48 bar); 4: 300 psi (20.68 bar); 5: 2000 psi (137.89 bar)
3051T upper range limits	Range 0: 5 psi; 1: 30 psi; 2: 150 psi; 3: 800 psi; 4: 4000 psi; 5: 10000 psi (689.47 bar); 6: 20000 psi (1378.95 bar)
Total response time (4-20 mA HART)	100 ms (3051C Ranges 2-5 and 3051T); 255 ms (Range 1); 700 ms (Range 0); dead time 45 ms
Power supply (4-20 mA HART)	10.5 to 42.4 Vdc; 250 Ω minimum loop resistance for communication
Other outputs	FOUNDATION Fieldbus and PROFIBUS PA: 9.0 to 32.0 Vdc, 17.5 mA; WirelessHART (IEC 62591, 2.4 GHz); 1-5 Vdc HART low power
Isolating diaphragm materials	316L SST, Alloy C-276, Alloy 400, tantalum, gold-plated Alloy 400, gold-plated 316L SST (availability depends on model)
Functional safety	SIL 2/3 certified to IEC 61508; safety certification option QT, 4-20 mA HART output only

Selecting the Right Rosemount 3051 Model

The 3051 is a platform rather than a single instrument, and the model string is built up from a base model, a measurement type, a range code, a transmitter output and then materials, connections and options. Getting the first few characters right avoids most ordering errors:

3051C (Coplanar™) – the general-purpose layout for differential, gauge and absolute pressure. It mates directly with integral manifolds and primary elements for flow duty.
3051T (In-line) – single-port gauge or absolute pressure, threaded straight onto the process. A compact choice for line and pump discharge pressure.
3051L (Liquid level) – flange-mounted DP transmitter for tank level where impulse piping is undesirable, typically with an extended diaphragm or remote seal on the low side.
Range code – choose the smallest range that still covers the maximum calibrated span with margin. Oversizing the capsule costs accuracy at low spans.
Output code – 4–20 mA HART is the default; FOUNDATION Fieldbus and PROFIBUS PA versions are separate output options and cannot be converted in the field.

When replacing an installed unit, the fastest route is to send us the full model string from the nameplate. That preserves wetted materials, fill fluid, hazardous-area approval and conduit threads exactly as the plant has them documented.

Installation and Commissioning Tips

Tap orientation: on liquid and steam service take the taps from the side of the pipe with the transmitter below, so gas bubbles vent back to the line. On gas service mount the transmitter above the taps so condensate drains away.
Impulse lines: keep them as short as practical, slope them continuously and keep both legs at the same temperature. Unequal leg temperature is a common source of a slow DP offset.
Manifold sequence: use a 3- or 5-valve manifold and open the equalising valve first when putting the transmitter in service, to avoid over-ranging one side of the sensor.
Zero trim: perform the zero trim at operating static pressure with the manifold equalised, not on the bench at atmosphere, especially on DP flow loops.
Square root: apply square-root extraction in either the transmitter or the DCS, never both.

Maintenance and Troubleshooting

Most field complaints on 3051 loops trace back to the installation rather than the sensor. A reading that freezes or responds sluggishly usually points to a plugged or frozen impulse line; blow the lines down and check heat tracing. A steady offset that appears after a process upset is often a gas pocket or liquid slug trapped in a leg. Use a HART communicator or asset management software to read the device status, confirm the lower and upper range values and check the sensor and module temperatures before pulling the unit. If the process variable is correct in HART but wrong at the DCS, perform a loop test and a 4–20 mA analog output trim rather than a sensor trim.

Applications in Oman and the GCC

In the region the 3051 is found on orifice and averaging pitot flow runs at oil and gas production stations, on separator and knock-out drum level, on boiler drum level and steam flow in power and desalination plants, and on filter differential pressure in water treatment. For high-ambient outdoor installations, sunshades and correctly rated cable glands make a measurable difference to long-term stability.

Rosemount 3051 Range Codes, Accuracy and Stability by Model

Performance figures for the 3051 depend on model and range code. The coplanar 3051C in Ranges 2 to 4 has a reference accuracy of ±0.04% of span, Range 5 has ±0.065% and the low Ranges 0 and 1 have ±0.10%. The in-line 3051T achieves ±0.04% in Ranges 0 to 4 and ±0.075% in Ranges 5 and 6, and the 3051L level transmitter is specified at ±0.075% of span. Emerson states these values to at least three sigma and includes linearity, hysteresis and repeatability in them.

Upper range limits for the differential 3051CD run from 3 inH2O (7.45 mbar) in Range 0 through 250 inH2O (621.6 mbar) in Range 2 to 2000 psi (137.89 bar) in Range 5, and the Range 2 sensor can be spanned down to 1.67 inH2O. The 3051T extends from 5 psi in Range 0 to 20000 psi (1378.95 bar) in Range 6. Range 0 is offered only on the 3051CD, and Range 1 only on the 3051CD, 3051CG and 3051CF.

Total performance for 3051C Ranges 2 to 5 is ±0.14% of span, combining reference accuracy with ambient temperature and static pressure effects for a 28 °C change at rangedowns of 1:1 to 5:1. Long-term stability for the same ranges, and for 3051T Ranges 1 to 4, is ±0.2% of URL over 10 years with temperature changes of 28 °C and line pressure up to 1000 psi (68.95 bar).

Rosemount 3051 Outputs, Dynamic Response, Pressure Limits and Wetted Materials

The standard 4-20 mA HART transmitter operates from 10.5 to 42.4 Vdc and can be switched in the field between HART revision 5 and revision 7. Total response time is 100 ms for 3051C Ranges 2 to 5 and for the 3051T, with a nominal dead time of 45 ms and 22 updates per second. Software damping is adjustable from 0 to 60 seconds. FOUNDATION Fieldbus and PROFIBUS PA versions run from 9.0 to 32.0 Vdc and draw 17.5 mA; WirelessHART at 2.4 GHz and a 1-5 Vdc low-power HART output are also listed.

The 3051CD operates within specification at static line pressures up to 3626 psig (250 bar), or 4500 psig (310.26 bar) with option P9. With a coplanar flange and silicone fill the process temperature limits are -40 to +121 °C. Isolating diaphragms are available in 316L stainless steel, Alloy C-276, Alloy 400, tantalum and gold-plated versions. Safety certification to IEC 61508 (option QT) applies to the 4-20 mA HART output only.

Sourcing the Rosemount 3051 through Seven Star LLC

Send us the model string or your process data sheet and we will check the code, confirm hazardous-area certification and supply genuine new units with calibration certificates and manufacturer documentation. Our team can also quote matching manifolds, mounting brackets and spare electronics for planned shutdowns.

Other Models in the Rosemount 3051 Pressure Transmitters Range

Seven Star LLC supplies models from the Rosemount 3051 Pressure Transmitters range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.

Model	Category
Rosemount 3051 Pressure Transmitter	Pressure Instrumentation	You are viewing this model
Rosemount 3051 Coplanar Pressure Transmitter	Pressure Instrumentation	View details
Rosemount 3051S Series of Instrumentation	Pressure Instrumentation	View details
Rosemount 3051S Coplanar Pressure Transmitter	Pressure Instrumentation	View details
Rosemount 3051SAL Liquid Level Transmitter	Level Instrumentation	View details

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About brand

The Rosemount 3051 is one of the most frequently specified pressure transmitters in process plants, and it sits at the center of this listing. Rosemount, a measurement brand that dates from 1956 and has its home in Shakopee, USA, covers pressure, temperature, level and flow with instruments identified by a model string on the nameplate. Seven Star LLC is an independent supplier listing Rosemount pressure transmitters, level instruments, temperature transmitters, flowmeters and analytical sensors for sites in Oman and the GCC.

Rosemount product families on this page

Pressure includes the 3051 in its variants (3051T in-line, 3051L for liquid level, 3051CF DP flowmeter and the 3051SMV MultiVariable transmitter), the 2051 and 1199 diaphragm seal systems. Level instruments are the 3300 guided wave radar, the 5408 non-contacting radar and the 2120 vibrating fork switch. Temperature is covered by the 248 and 644 head mount transmitters and the 848T high density transmitter for multiple sensor inputs. The 8800D vortex flowmeter and the 702 wireless discrete transmitter are also listed, along with liquid analysis sensors.

Where Rosemount instruments are used

These are standard instruments in oil and gas production, refining, petrochemical, power and water plants. Typical duties are line and vessel pressure, differential pressure flow across orifice plates, tank and separator level and interface, and temperature measurement on pipes, reactors and rotating equipment.

Ordering Rosemount transmitters: what we need

Send the complete model string and the serial number from the nameplate; a photo is ideal. Every character of the string selects something: range, output, materials of the isolating diaphragm and flange, process connection, housing, approval and options. If you are specifying a new point, give the measured variable and span, process fluid, pressure and temperature, connection, output (4-20 mA HART, FOUNDATION Fieldbus or wireless), display and hazardous area approval. For remote seals add flange size, rating and capillary length.

Browse Rosemount products by category: Pressure Instrumentation, Temperature Instrumentation, Level Transmitter, Liquid Analysis Sensors, Flowmeters.

Flow computers and remote controllers lead the Emerson listing here: the ROC800 series and the FloBoss 107 used for gas and liquid measurement at wellheads, metering skids and pipeline stations. Emerson, founded in 1890 and headquartered in St. Louis, USA, also stands behind Micro Motion Coriolis meters, Fisher FIELDVUE valve controllers and the DeltaV control system. Seven Star LLC, an independent supplier, sources these Emerson products and their spare parts for users in Oman and the GCC.

Emerson product families on this page

The measurement and control group includes the ROC809 and the expandable ROC827 Remote Operations Controllers, the ROC800L for liquid measurement and the FloBoss 107 Flow Manager. Flow metering is represented by Micro Motion ELITE CMF Coriolis sensors and the 5700 transmitter. For valves there is the DVC6200 digital valve controller, plus solenoid valves and a safety relief valve. DeltaV hardware includes the PK Controller and DeltaV SIS components. Field tools are the AMS Trex Device Communicator and the earlier 475 Field Communicator, and wireless networks use the 1410S gateway with the 781S smart antenna. The cooling items are Copeland scroll and semi-hermetic compressors, which were sold for many years under the Emerson name.

Where Emerson equipment is used

ROC and FloBoss units calculate and log gas and liquid flow at production sites and custody transfer points. Micro Motion meters measure mass flow and density in loading, blending and fiscal metering. DVC6200 controllers position control valves and report valve diagnostics, and DeltaV runs process units in refineries, chemical plants and utilities. Copeland compressors serve air conditioning and refrigeration plants.

Ordering Emerson parts: what we need

Send the full model string and serial number from the nameplate. For ROC800 units list the I/O and communication modules fitted and the application, gas or liquid. For Coriolis meters give both the sensor and the transmitter model. For DeltaV parts quote the 12P or KJ part number, and for compressors the complete model number with voltage code.