Rosemount 3051C Pressure Transmitter

Fits continuous DP, gage, or absolute measurement on process loops that need a coplanar flange mount and a configurable 4–20 mA HART (or Fieldbus / PROFIBUS / WirelessHART) output.

Key advantages

Coplanar DP/gage/absolute — Range codes from DP −3…+3 inH2O to −2000…+2000 psi; gage and absolute options by code.
Reference accuracy — ±0.04% of span on ranges 2–4 (other ranges published differently).
Protocol choice — 4–20 mA HART, FOUNDATION Fieldbus, PROFIBUS PA, WirelessHART, or low-power 1–5 Vdc HART.
Materials & seals — 316L std diaphragm with Alloy C-276 / Alloy 400 / tantalum options; assemble-to / remote seal available.

Typical applications

Orifice, filter, and level DP loops on coplanar flanges.
Gage or absolute process pressure where a coplanar 3051C is preferred over in-line 3051T.
DCS/PLC loops needing HART, Fieldbus, PROFIBUS PA, or WirelessHART with SIL / Ex order codes.

Selection guide

Pressure type & range code — Differential −3…+3 inH2O to −2000…+2000 psi (ranges 0–5); gage −25…+25 inH2O to −14.2…+2000 psi; absolute 0…30 to 0…4000 psia. Pick the range code that covers your calibrated span, not just the process max.
Reference accuracy — ±0.04% of span (ranges 2–4); ±0.065% (range 5); ±0.10% (range 1); range 0 CD ±0.10% of span. Match the code to the accuracy your loop can afford.
Output / protocol — 4–20 mA HART; FOUNDATION Fieldbus; PROFIBUS PA; WirelessHART; low-power 1–5 Vdc HART. Confirm DCS/PLC protocol before ordering.
Supply — 10.5–42.4 Vdc (4–20 mA HART, no load); 9.0–32.0 Vdc (Fieldbus/PROFIBUS). Check loop resistance and barrier drop.
Process connection — ¼–18 NPT on 2⅛-in centers; ½–14 NPT on 2-, 2⅛-, or 2¼-in centers (coplanar / adapters / flanges per order).
Wetted materials — Isolating diaphragm 316L SST (std); Alloy C-276, Alloy 400, tantalum, gold-plated options; flanges SST / C-276 / Alloy 400 / plated CS. Match media chemistry and fill fluid (silicone std or inert).
Process / ambient temperature — Silicone fill with coplanar flange −40…+121 °C; traditional/level flange −40…+149 °C (fill/flange dependent). Ambient −40…+85 °C (with display −40…+80 °C; BR5/BR6 lower).
Housing & IP — Aluminum or SST (engineered polymer for wireless). Type 4X, IP65, IP66, IP68 (housing code P: NEMA 4X / IP66/67/68).
Electrical entries — ½–14 NPT, G½, or M20×1.5 conduit.
Area classification — ATEX/IECEx flameproof, IS, Type n, dust options (order codes E8/I1/N1/E7/I7 etc.). Approvals published for ordered codes: SIL 2/3 (IEC 61508), ATEX, IECEx, FM, CSA, CE.
Display / LOI — Optional LCD / graphical LCD / LOI; Bluetooth option available by code.
Mounting — Coplanar flange / traditional flange / brackets (pipe or panel). Remote / assemble-to seal optional.

Common mistakes

Ordering a range code whose URL (upper range limit) is far above the working span — you pay for turndown and lose resolution at the bottom of the scale.
Specifying 316L diaphragm for media that need C-276, Alloy 400, or tantalum — wetted material is a model-code choice, not a field swap.
Assuming every housing meets the same IP/NEMA line; wireless polymer and code-P housings differ — check the order code against the published Emerson limits for that housing.
Mixing Fieldbus/PROFIBUS supply limits (9.0–32.0 Vdc) with a 4–20 mA HART loop design (10.5–42.4 Vdc).
Claiming SIL or hazardous-area coverage without the matching order codes and certificates on the quote.

When to RFQ / what to tell us

Pressure type (DP / gage / absolute) and required calibrated span + units.
Media, process temperature, and preferred fill (silicone or inert).
Wetted materials and flange / process connection.
Output protocol and available supply voltage / loop load.
Ambient, IP needs, and hazardous-area / SIL marks required.
Display, mounting (coplanar vs traditional), remote seal yes/no, quantity, ship-to country.

Request a Quote · Get selection help

Specs

Spec	Value
SKU	24474
Brand	Rosemount
Model	3051C
Product type	transmitter
Pressure type	differential (family also gage / absolute by range code)
Measuring range	Differential −3…+3 inH2O to −2000…+2000 psi (ranges 0–5); gage −25…+25 inH2O to −14.2…+2000 psi; absolute 0…30 to 0…4000 psia (by range code)
Accuracy	±0.04% of span (ranges 2–4); ±0.065% of span (range 5); ±0.10% of span (range 1); range 0 CD ±0.10% of span
Output signal	4–20 mA HART; FOUNDATION Fieldbus; PROFIBUS PA; WirelessHART; low-power 1–5 Vdc HART
Supply voltage	10.5–42.4 Vdc (4–20 mA HART, no load); 9.0–32.0 Vdc (Fieldbus/PROFIBUS)
Process connection	¼–18 NPT on 2⅛-in centers; ½–14 NPT on 2-, 2⅛-, or 2¼-in centers (coplanar/adapters/flanges per order)
Electrical connection	½–14 NPT, G½, or M20×1.5 conduit entries
Wetted materials	Isolating diaphragm 316L SST (std); Alloy C-276, Alloy 400, tantalum, gold-plated options; flanges SST/C-276/Alloy 400/plated CS
Housing material	Aluminum or SST (engineered polymer for wireless)
IP rating	Type 4X, IP65, IP66, IP68 (housing code P: NEMA 4X / IP66/67/68)
Media temperature	Silicone fill with coplanar flange −40…+121 °C; traditional/level flange −40…+149 °C (fill/flange dependent)
Ambient temperature	−40…+85 °C (with display −40…+80 °C; BR5/BR6 options lower)
Display	Optional LCD / graphical LCD / LOI
Communication	HART; FOUNDATION Fieldbus; PROFIBUS PA; WirelessHART; Bluetooth option
Approvals	SIL 2/3 (IEC 61508); ATEX; IECEx; FM; CSA; CE
Hazardous area	ATEX/IECEx flameproof, intrinsic safety, Type n, dust options (order codes E8/I1/N1/E7/I7 etc.)
Diaphragm seal	Optional (assemble-to / remote seal options)
Fill fluid	Silicone (std) or inert
Mounting	Coplanar flange / traditional flange / brackets (pipe or panel)
Notes	Configurable family; ranges and materials by model code.

Documents

Rosemount 3051C datasheet (PDF)

FAQ

Q: DP, gage, or absolute — which 3051C configuration do I need? A: Match the process reference. DP for orifice/filter/level across a tap pair; gage when the low side sees atmosphere; absolute when you need absolute zero. Range codes cover all three — state the type and span in the RFQ.

Q: Is ±0.04% of span always available? A: ±0.04% of span applies to ranges 2–4. Ranges 1, 5, and range 0 CD have different published accuracies. Lock the range code with the accuracy you need.

Q: Which approvals can I claim on the nameplate? A: Only those published for the ordered codes: SIL 2/3 (IEC 61508), ATEX, IECEx, FM, CSA, CE. Hazardous-area protection type is selected by order code (E8/I1/N1/E7/I7 etc.).

Q: What should I send for a quote? A: Pressure type and span, media and temperature, wetted materials, process connection, protocol and supply, IP / area class, display and mounting, quantity. We do not claim authorized-dealer status — ask for compatibility with systems using Rosemount 3051C if you need a drop-in check.