BD|SENSORS DMD 331

Official BD|SENSORS DMD 331 product photograph.

Manufacturer: BD|SENSORS. Products & Manufacturers

Differential pressure transmitter. Values below are manufacturer family specifications; ranges and options differ by ordering code.

Technical specifications

Pressure range	20 mbar to 16 bar (model options)
Accuracy	0.5% FSO
Sensor	Stainless steel
Differential type	Wet/wet

Official technical documentation

Manufacturer technical source / datasheet ↗

Source reviewed: 17 October 2026. Exact SKU specifications, certifications and ordering options must be verified before product selection.

DMD 331 — wet/wet differential media

DMD 331 is identified as a wet/wet differential pressure instrument, making process material compatibility important on both pressure ports. Select the exact 20 mbar–16 bar portfolio range, diaphragm seals, process temperature and allowable common-mode/static pressure; differential measuring capability does not mean unlimited line pressure. A published 0.5% FSO accuracy class refers to the fitted span. Compare fluid isolation and installation with silicon low-range DMD 341 before proposing a replacement.

DMD 331 — wet/wet stainless differential process transmitter: technical profile and specification boundaries

Original BD|SENSORS catalogue differentiates calibrated pressure ranges, media and approval tiers. A family range and optional certification must not be confused with the ordered device.

Parameter	Original maker statement	Practical selection note
Sensing method	Two-sided 316L-family stainless-steel piezoresistive differential sensing element	Can measure compatible liquid or gas on both high and low sides.
Available differential spans	0–20 mbar up to 0–16 bar across ordered versions	A wide catalogue spans many individual cells; no single transmitter is universally settable.
Published accuracy	±0.5% FSO	FSO is full scale output, not percent reading near zero.
Application media	Compatible with stainless-steel 1.4404 / 1.4435 and the specified seals	Wet/wet does not grant universal corrosive chemical compatibility.
Body / integration	Compact industrial process housing; threaded process connections	Pressure-tight fittings and venting affect accuracy and safety.
Safety variants	BD\|SENSORS shows an Ex-labelled family option	A catalogue Ex icon is not an exact ATEX/IECEx marking for an unordered version.
Electrical signal	Analog current/voltage options subject to exact part code	Identify two-wire or three-wire supply and loop load from order number.

Application engineering and commissioning

DMD 331 is appropriate where both pressure ports may contact process fluids, unlike silicon/gas-oriented DMD 341. Select wetted material and seals separately from the nominal gauge pressure. The positive-minus-negative pressure must remain within both the differential cell’s range and its line/static pressure limits; high static line pressure can damage tubing, seals or the sensing element even with a small differential. Assign alarm direction, pressure unit, signal scaling and proper bleed/venting in the control system. Confirm current Ex certificate only for appropriately marked production units.

Original product range: BD|SENSORS manufacturer specifications and linked model documentation. Review exact current sensor code, output, material and certificates before final purchasing.

AirAlign independent technical editorial enrichment · 25 October 2026. These statements are not standalone Ex-area approvals, calibration certificates or proof of active stock.