E+H Deltabar PMD75 DP Transmitter

Fits continuous differential (and related gage/absolute cell) pressure measurement on process loops that need a metal-membrane DP transmitter with 4–20 mA HART, PROFIBUS PA, or FOUNDATION Fieldbus.

Key advantages

• Broad DP cell ladder — from 10 mbar (0.15 psi) to 40 bar (600 psi); gage/absolute cells to 250 bar (3750 psi) per TI.
• Reference accuracy up to ±0.035% — Platinum; Standard typically ±0.05% (cell/TD dependent).
• Protocol choice — 4–20 mA HART; PROFIBUS PA; FOUNDATION Fieldbus.
• SIL3 + Ex — ATEX/IECEx/FM/CSA/SIL3/CE by ordered codes.

Typical applications

• DP flow and filter monitoring on process lines.
• Level via DP on pressurized vessels.
• Loops standardized on E+H Deltabar with PA/FF hosts.

Selection guide

• Pressure type & range — Differential measuring cells from 10 mbar (0.15 psi) to 40 bar (600 psi); gauge/absolute cells up to 250 bar (3750 psi) per TI. Pick the cell that covers the calibrated span, not only process max.
• Accuracy — Reference accuracy up to ±0.035% (Platinum); Standard typically ±0.05% (cell/TD dependent).
• Output / protocol — 4–20 mA with HART; PROFIBUS PA; FOUNDATION Fieldbus. Confirm DCS/PLC protocol before ordering.
• Supply — 4–20 mA HART: 10.5–45 VDC (non-Ex); Ex ia typically 10.5–30 VDC; PA/FF: 9–32 VDC.
• Process connection — Oval flange 1/4-18 NPT or RC 1/4 (PMD75 process connections).
• Wetted materials — Process membrane AISI 316L (1.4435), Alloy C276, gold/rhodium-coated, Monel (options).
• Media / ambient temperature — Process temperature at transmitter typically −50…+85 °C (−58…+185 °F); diaphragm-seal versions higher (to 400 °C). Ambient without LCD up to −50…+85 °C; with LCD −20…+70 °C (extended −50…+85 °C with display limits).
• Overpressure — OPL cell-dependent (e.g. one-side/both-sides limits in TI; PN160/PN420 variants).

Common mistakes

• Ordering a cell whose URL is far above the working span — you lose resolution and still pay for the cell class.
• Specifying 316L membrane for media that need Alloy C276, Monel, or coated options — wetted material is an order-code choice.
• Mixing HART supply design (10.5–45 VDC non-Ex) with PA/FF limits (9–32 VDC) or Ex ia voltage caps.
• Claiming SIL3 or Ex coverage without the matching order codes and certificates on the quote.
• Ignoring OEM phase-out status — confirm PMD75 vs successor PMD75B availability in the RFQ if long-term supply matters.
• Assuming every housing meets the same IP line — IP66/67/68 depends on housing/connector per TI.

When to RFQ / what to tell us

1. Pressure type (DP / gage / absolute cell) and required calibrated span + units.
2. Media, process temperature, and preferred fill / diaphragm-seal need (FMD77/FMD78 family if remote seal).
3. Wetted materials and oval-flange process connection.
4. Output protocol and available supply voltage / loop load / Ex constraints.
5. Ambient, LCD yes/no, IP need, and hazardous-area / SIL marks required.
6. Whether PMD75 or successor PMD75B is preferred; quantity; ship-to country.

Request a Quote · Get selection help

Specs

Documents

• Endress+Hauser Deltabar PMD75 technical information (PDF)

FAQ

Q: DP only, or gage/absolute as well? A: Primary family is differential; TI also covers gauge/absolute cells up to 250 bar. State pressure type and span in the RFQ.

Q: Is ±0.035% always available? A: That is the Platinum reference accuracy figure. Standard is typically ±0.05% and depends on cell and turndown — lock accuracy class with the cell code.

Q: Which approvals can I claim? A: Only those on the datasheet and ordered codes: ATEX, IECEx, FM, CSA, SIL3, CE. Ex and SIL coverage are selected by order code.

Q: What should I send for a quote? A: Type and span, media and temperature, wetted materials, connection, protocol and supply, IP / area class, LCD, PMD75 vs PMD75B preference, quantity. Compatible with systems using Endress+Hauser Deltabar PMD75 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