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Brand: Endress+Hauser (E & H)
Endress+Hauser PMD63B Deltabar Diaphragm Seal DP Transmitter
Description
Endress+Hauser PMD63B Deltabar diaphragm seal differential pressure transmitter
The Endress+Hauser PMD63B is the diaphragm seal version of the Deltabar B generation: a digital differential pressure transmitter that is connected to the process through one or two welded diaphragm seals, using a capillary line or a temperature isolator on each side. That construction lets it measure level, differential pressure and flow on hot, viscous, corrosive or hygienic media that would block or damage the impulse lines of a normal transmitter. Seven Star LLC supplies the PMD63B in Oman and the GCC as an independent supplier based in Muscat.
Differential ranges run from 100 mbar to 40 bar (1.5 to 600 psi) with process temperatures up to 250 °C (482 °F) at the seal, and communication options include 4 to 20 mA analog, HART, PROFIBUS PA and PROFINET over Ethernet-APL, with optional Bluetooth.
PMD63B technical specifications
| Parameter | Specification |
|---|---|
| Manufacturer / part number | Endress+Hauser PMD63B (Deltabar with diaphragm seal) |
| Measured variable | Differential pressure; level, volume and mass in vessels; flow |
| Measuring cells | 100, 500 mbar and 3, 16, 40 bar (1.5 to 600 psi) |
| Static pressure (MWP) | Up to 160 bar (2 400 psi) depending on the process connection; 100 bar if only the negative side of the 40 bar cell is loaded |
| Reference accuracy, seal and temperature isolator on one side | ±0.10 % (100 mbar cell, to 5:1); ±0.075 % (500 mbar to 40 bar, to 15:1); Platinum not available |
| Reference accuracy, two capillaries | ±0.15 % (100 and 500 mbar cells, to 5:1); ±0.10 % (3 bar and above, to 15:1) |
| Turn down | Up to 100:1 standard; higher on request |
| Long-term stability | 500 mbar and above: ±0.025 % of URL in 1 year, ±0.15 % over 15 years; 100 mbar cell: ±0.08 % in 1 year |
| Process temperature (seal) | –40 to +250 °C depending on seal and fill fluid; temperature isolator long 250 °C, short 200 °C |
| Ambient temperature | –40 to +85 °C; display usable without limitation from –20 to +60 °C; PVC-coated armour –25 to +80 °C |
| Minimum static pressure | 50 mbar abs, observing the fill fluid limits |
| Fill fluid | Silicone oil (FDA 21 CFR 175.105) or vegetable oil (FDA 21 CFR 172.856) |
| Output | 4 to 20 mA, HART, PROFIBUS PA, PROFINET over Ethernet-APL; optional Bluetooth |
| Supply voltage | Analog/HART 10.5 to 35 V DC (10.5 to 30 V DC Ex i); PROFIBUS PA 9 to 32 V DC; APL power class A 9.6 to 15 V DC |
| Membrane | 316L (1.4435) or 316L with TempC process membrane |
| Functional safety | 4 to 20 mA devices developed to IEC 61508 for monitoring up to SIL 3 |
The figures are taken from the Endress+Hauser Technical Information for the Deltabar PMD63B. The overpressure limit of the device is generally 160 bar on one side and 240 bar on both sides, and the ratings of the selected seal, flange and fill fluid can lower this.
How the PMD63B measures
Each diaphragm seal membrane transfers its pressure through an incompressible fill fluid to an internal membrane on the measuring cell. The two internal membranes deflect, and a second fill fluid carries the pressures to the opposite faces of the silicon measuring element, where a resistance bridge produces a signal that depends on the differential pressure. Because the system is welded, there are no screwed joints in the oil circuit that could leak.
The design decides the behaviour. Seals with temperature isolators keep the electronics cool on hot lines; seals with capillaries decouple the transmitter from vibration and place it where operators can reach it; the TempC membrane reduces the temperature error of the whole system. Capillaries also attenuate pressure shocks. On tall vessels the two seals on different elevations measure the hydrostatic difference, and h = Δp / (ρg) gives the level.
PMD63B seal system configurations
| Configuration | High pressure side | Low pressure side |
|---|---|---|
| Seal on one side | Temperature isolator or capillary | Standard side flange connection with seal material FKM, EPDM, PTFE or FFKM |
| Seals on both sides, isolator plus capillary | Temperature isolator | Capillary |
| Seals on both sides, two capillaries | Capillary of one length | Capillary of a different length if required |
Capillary lengths on the two sides can be chosen separately to suit the installation, which reduces costs and eases fitting. Support the capillary and keep its bending radius at or above 100 mm (3.94 in). Armour is available in 316L, PVC-coated and PTFE-jacketed versions.
Process connections. The seal side offers flush-membrane flanges to EN 1092-1 and ASME B16.5, and hygienic and special connections: universal process adapter, Tri-Clamp, Varivent, DRD DN 50, SMS nozzle with union nut, DIN 11851 taper adapter, NEUMO BioControl and sanitary tank spud, mostly available with the TempC membrane. The flange raised face is made of the same material as the membrane. Flange standard, size and rating determine the maximum working pressure of the complete device.
PMD63B selection and ordering checklist
- Measuring task: level, differential pressure or flow, with the vessel height or maximum differential pressure.
- Seal arrangement: one seal or two, isolator or capillary on each side, and capillary lengths on HP and LP.
- Seal connection: flange standard, size and rating, or hygienic connection, with membrane material and TempC option.
- Fill fluid: silicone oil or vegetable oil, matched to the temperature and vacuum limits.
- Communication: 4 to 20 mA, HART, PROFIBUS PA or PROFINET over Ethernet-APL, with or without Bluetooth.
- Housing: single-compartment aluminium, hygienic 316L, or dual-compartment aluminium.
- Software and approvals: Heartbeat Technology and the Ex protection required.
Where the PMD63B fits in the Deltabar family
For clean fluids at moderate temperature the PMD50 and PMD55B are simpler and lower in cost, since they work with conventional impulse piping. The PMD63B is chosen when impulse piping would freeze, clog, corrode or leak, for example on viscous crude, polymer, sludge or hot oil. A pressure-only alternative with the same operating concept is the Cerabar PMP63B, and for pressure measurement with a seal on older platforms the PMP55 is also used.
PMD63B installation, commissioning and maintenance
Treat the PMD63B as a matched system. The two capillaries should run together and see the same ambient temperature, and the transmitter should be mounted with a bracket on hot lines. After installation set the range and damping, and zero the device with the process at a known level or with both seals at equal pressure. Never remove a seal from the capillary or the transmitter; the system is filled and welded at the factory, and opening it destroys calibration.
Plan verification with the Heartbeat package, which checks the transmitter without stopping the process. Do not exceed the 85 °C seal limit on the low-pressure side. Record the HP and LP capillary lengths on the maintenance file, because a replacement must match them.
Typical PMD63B applications in Oman and the GCC
The PMD63B is used on columns and separators in oil and gas, on hot oil and thermal fluid vessels, in desalination brine heaters and sludge lines, and in chemical and polymer plants where product can solidify in ordinary impulse lines. The capillary variants suit tall vessels, flare knock-out drums and storage tanks in hot, dusty conditions. Where ambient temperatures rise above 60 °C, shade the transmitter and the capillaries and check the armour limits, since PVC coating reduces the permitted ambient range.
Information to send with a PMD63B RFQ
- Part number PMD63B and the full order code if you are replacing an installed unit.
- Differential pressure or level span, vessel height, and the density of the medium.
- Process temperature range, static pressure and any vacuum condition.
- Seal connection, material, TempC option, capillary lengths and armour.
- Communication, Ex approval, housing and quantity.
Documents and quotation
The Endress+Hauser Technical Information for the Deltabar PMD63B is attached on this page, with the ranges, configurations and ordering information.
Send us the PMD63B details above and Seven Star LLC will prepare a quotation for Oman and the GCC.
Other Models in the Eh Deltabar Dp Range
Seven Star LLC supplies models from the Eh Deltabar Dp range in Oman and the GCC. Compare the related models below and request a quote for the one that matches your application.
| Model | Category | |
|---|---|---|
| Endress+Hauser PMD55B Deltabar Differential Pressure Transmitter | Pressure Instrumentation | View details |
| Endress+Hauser PMD50 Deltabar HART DP Transmitter | Pressure Instrumentation | View details |
| Endress+Hauser PMD63B Deltabar Diaphragm Seal DP Transmitter | Pressure Instrumentation | You are viewing this model |
Datasheets & Documents
- Datasheet Endress+Hauser PMD63B Technical Information Download
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About brand
Endress+Hauser makes process measurement instruments for flow, level, pressure, temperature and liquid analysis. Georg H. Endress and Ludwig Hauser started the business in Lörrach, Germany, on 1 February 1953, first selling level meters, and the Endress+Hauser name has been used since 1957. The group is headquartered in Reinach, Switzerland, and has been wholly owned by the Endress family since 1975.
Seven Star LLC is an independent supplier listing Endress+Hauser flowmeters, level and pressure transmitters, temperature assemblies and liquid analysis products for buyers in Oman and the GCC. Instruments are matched from the full order code on the nameplate.
Endress+Hauser company profile
| Origin | Founded in Lörrach, Germany, on 1 February 1953 by the Swiss engineer Georg H. Endress and Ludwig Hauser |
|---|---|
| Headquarters | Endress+Hauser AG, Reinach (Basel-Landschaft), Switzerland |
| Ownership | Family owned; the Endress family has been the sole shareholder since 1975, and a family charter commits the company to stay family owned |
| Size | About 16,500 employees and sales of about EUR 3.7 billion (2023, as reported by the company) |
| Product families | Proline flowmeters, Micropilot and Levelflex radar, Liquiphant switches, Cerabar and Deltabar pressure, iTEMP and iTHERM temperature, Liquiline and Memosens liquid analysis |
Milestones
- 1953: Georg H. Endress and Ludwig Hauser start the business in Lörrach on 1 February, first selling level meters.
- 1957: The Endress+Hauser name comes into use.
- 1975: The Endress family becomes sole shareholder.
- 2023: About 16,500 employees and sales of about EUR 3.7 billion, as reported by the company.
Endress+Hauser product lines
| Line | Measuring principle | Typical use |
|---|---|---|
| Promass F 300, Promass 80F, 83F/84F | Coriolis mass flow | Direct mass flow and density of liquids and gases, hydrocarbon transfer and chemical dosing |
| Promag P 300, P 500, H 300, W 400, W 10, 50P | Electromagnetic flow | Water, wastewater, slurries and other conductive liquids |
| Prowirl F 200, 72F | Vortex flow | Steam, gas and low-viscosity liquids |
| Prosonic Flow 92F, t-mass 65F | Ultrasonic and thermal mass flow | Water lines; compressed air and industrial gases |
| Micropilot FMR62, FMR67, FMR60, FMR10B, FMR20, FMR50, FMR52 | Free-space radar level, 80 GHz and 26 GHz | Tanks, process vessels, silos and open water channels |
| Levelflex FMP51, FMP50, FMP54, FMP55 | Guided wave radar level | Level and interface in vessels, separators and bypass chambers |
| Liquiphant FTL51, Prosonic S FMU90 | Vibronic point level; ultrasonic level | High and low level alarms, pump protection, open channel flow |
| Cerabar PMC71B, PMP51B, PMP71, Deltabar PMD78B, PMD75 | Pressure and differential pressure | Process pressure, hydrostatic level and DP flow |
| iTEMP TMT82, TMT162, iTHERM TM101, TR66, TR10 | Temperature transmitters and thermometers | RTD and thermocouple points with thermowells |
| Liquiline CM444, CM442, Memosens CPS11E, Stamolys reagents | Liquid analysis | pH, ORP, conductivity, dissolved oxygen and nutrient analysis in water treatment and process |
Where Endress+Hauser instruments are used
In Oman and the GCC, Endress+Hauser instruments are common in oil and gas production and processing, refineries and petrochemicals, desalination and water networks, wastewater treatment, power plants and food and beverage plants. Coriolis meters measure hydrocarbon and chemical flows, electromagnetic meters cover water and wastewater, radar transmitters handle tank and silo level, and Liquiline analysers monitor water quality. Proline 300 and 500 flowmeters include Heartbeat Technology for in-situ verification, which reduces the need to remove a meter for checks.
Ordering Endress+Hauser instruments: what we need
The order code on the nameplate (for example PMP71-1QA1S11RDADU) defines every option: measuring range, process connection, materials, output, approvals and display. Send it with the serial number; Endress+Hauser can retrieve the original configuration from the serial number. For a new instrument add the medium, operating and design pressure and temperature, range, line size or tank geometry, process connection, wetted materials, output or protocol (4-20 mA HART, PROFIBUS, FOUNDATION Fieldbus, Modbus) and the hazardous-area approval required. Older models such as Promass 80/83 or Micropilot M are replaced by current Proline or 80 GHz Micropilot devices.
Facts checked against Endress+Hauser company history and product information, October 2026.
Browse Endress+Hauser products by category: Flowmeters, Level Transmitter, Pressure Instrumentation, Temperature, Liquid Analysis Sensors, Liquid Analytical Systems.
FAQ
Questions about the Endress+Hauser PMD63B Deltabar Diaphragm Seal DP
Answers from our engineering team on installation, compatibility and integration.
01What is the PMD63B?
It is a Deltabar differential pressure transmitter that connects to the process through one or two welded diaphragm seals, using capillaries or temperature isolators. It is used for level, differential pressure and flow on hot, viscous, corrosive or hygienic media.
02What process temperature can the PMD63B handle?
Depending on the seal and fill fluid the seal side can operate from –40 up to +250 °C. A long temperature isolator is rated for 250 °C and a short one for 200 °C, while the transmitter electronics stay within –40 to +85 °C ambient.
03What accuracy does the PMD63B achieve?
With a seal and temperature isolator on one side the reference accuracy is ±0.075 % for cells from 500 mbar, and ±0.10 % on the 100 mbar cell. With two capillaries it is ±0.15 % on the smallest cells and ±0.10 % from 3 bar. Platinum is not available.
04Which fill fluids can be used?
The datasheet lists silicone oil to FDA 21 CFR 175.105 and vegetable oil to FDA 21 CFR 172.856. Silicone covers –40 to +250 °C at 1 bar abs or more, and vegetable oil –10 to +220 °C. The limits tighten under vacuum.
05Does the PMD63B support PROFINET and Bluetooth?
Yes. The communication options are 4 to 20 mA analog, HART, PROFIBUS PA and PROFINET over Ethernet-APL, and Bluetooth is optional on the display. Heartbeat Technology can be ordered for verification and monitoring.
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