Rosemount 3051T Pressure Transmitter

Fits continuous gage or absolute measurement on process loops that need a direct in-line process mount and a configurable 4–20 mA HART (or Fieldbus / PROFIBUS / WirelessHART) output — distinct from the coplanar 3051C.

Key advantages

• In-line gage/absolute — Ranges to 20000 psi / 20000 psia by range code; direct process mount.
• Family accuracy — 0.04% of span reference accuracy (range-dependent published performance).
• Protocol choice — 4–20 mA HART, FOUNDATION Fieldbus, PROFIBUS PA, WirelessHART, or low-power 1–5 Vdc HART.
• Connection codes — ½–14 NPT female (2B), G½ A EN837-1 (2C), autoclave F-250-C (2F), non-threaded flange (61).

Typical applications

• In-line gage or absolute pressure on process piping where coplanar flanges are not wanted.
• High-range duties (to 20000 psi class) with matching connection code.
• DCS/PLC loops needing HART / Fieldbus / PROFIBUS / WirelessHART with SIL / Ex order codes.

Selection guide

• Pressure type & range code — Gage −14.7…20000 psi (ranges 0–6); absolute 0…20000 psia (ranges 1–6) by range code. Pick the code that covers your calibrated span, not just the process max.
• Reference accuracy — 0.04% of span (3051 family; range-dependent published performance). 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); Fieldbus/PROFIBUS and wireless per Emerson published supply limits. Check loop resistance and barrier drop.
• Process connection — ½–14 NPT female (2B); G½ A EN837-1 male (2C); autoclave F-250-C (2F, high ranges); non-threaded instrument flange (61).
• Electrical entries — ½–14 NPT, M20×1.5, or G½ conduit entries (housing code).
• Wetted materials — Isolating diaphragm 316L SST (std) or Alloy C-276; process connection wetted parts per order codes. Match media chemistry and fill fluid (silicone std or inert).
• Process / ambient temperature — Silicone/inert fill process limits (in-line typically −40…+121 °C class with silicone; confirm fill/connection on RFQ). Ambient −40…+85 °C (with display −40…+80 °C; BR5/BR6 options lower).
• Housing & IP — Aluminum or SST (engineered polymer for wireless). Type 4X, IP65, IP66, IP68 (housing code P: NEMA 4X / IP66/67/68).
• Area classification — ATEX/IECEx flameproof, intrinsic safety, 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 — Direct in-line process mount; brackets as ordered. Remote / assemble-to seal optional.
• Fill fluid — Silicone (std) or inert.

Common mistakes

• Ordering a coplanar 3051C (SKU 24474) when the duty needs in-line 3051T — mounting and process connection families differ.
• Ordering a range code whose URL 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 Alloy C-276 — wetted material is a model-code choice, not a field swap.
• Mixing Fieldbus/PROFIBUS supply limits with a 4–20 mA HART loop design (10.5–42.4 Vdc no load).
• Claiming SIL or hazardous-area coverage without the matching order codes and certificates on the quote.
• 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.

When to RFQ / what to tell us

1. Pressure type (gage / absolute) and required calibrated span + units.
2. Media, process temperature, and preferred fill (silicone or inert).
3. Wetted materials and process connection (2B / 2C / 2F / 61).
4. Output protocol and available supply voltage / loop load.
5. Ambient, IP needs, and hazardous-area / SIL marks required.
6. Display, mounting/brackets, remote seal yes/no, quantity, ship-to country.

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Specs

Documents

• Rosemount 3051T datasheet (PDF)

FAQ

Q: How is 3051T different from 3051C? A: 3051T is the in-line gage/absolute member; 3051C is the coplanar family (DP/gage/absolute with flange mount). Same 3051 family — state in-line vs coplanar and the span in the RFQ.

Q: Is 0.04% of span always available? A: That is the family reference accuracy; published performance is range-dependent. 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. Compatible with systems using Rosemount 3051T if you need a drop-in check — we do not claim authorized-dealer status.

Links

• Pressure instruments · Pressure buying guide
• Request a Quote · Get selection help