Technical Data
CompareContinuous / Liquids
| Measuring Principle | Differential pressure |
| Characteristic / Application | Digital transmitter with metallic measuring diaphragms Modular transmitter Long term stability High static pressure/Overload resistance Enhanced safety via self diagnostic functions Secondary process barrier |
| Supply / Communication | 4...20 mA HART: 10,5...45V DC Ex ia: 10,5...30V DC PROFIBUS PA / FOUNDATION Fieldbus: 9...32V DC |
| Accuracy | Standard: 0.05% Platinum: up to 0.035% |
| Long term stability | 0,05% of URL/year |
| Ambient temperature | -50 °C...85 °C (-58 °F...185 °F) |
| Process temperature | -40 °C...85 °C (-40 °F...185 °F) |
| Process pressure / max. overpressure limit | 420 bar (6300 psi) |
| Pressure measuring range | 10 mbar...250 bar (0.15 psi...3750 psi) |
| Main wetted parts | Alloy C276 316L Monel Tantalum |
| Process connection | 1/4-18NPT RC1/4" |
| Max. measurement distance | 400 m (1.312 ft) H2O |
| Communication | 4...20 mA HART PROFIBUS PA FOUNDATION Fieldbus |
| Certificates / Approvals | ATEX, FM, CSA, CSA C/US, IEC Ex, INMETRO, NEPSI, EAC |
| Safety approvals | SIL |
| Design approvals | EN 10204-3.1 NACE MR0175, MR0103 |
| Marine approval | GL/ ABS |
| Options | HistoROM/M-Dat 4-line digital display SS- or Aluminiumhousing Separate housing |
| Successor | PMD75B |
| Application limits | Measuring cell: Metal welded |
Gas
| Measuring Principle | Differential pressure |
| Product headline | Digital transmitter with metallic measuring diaphragms Modular transmitter Long-term stability High static pressure/Overload resistance Enhanced safety via self diagnostic functions Secondary process barrier |
| Max. measurement error | 0,075% "PLATINUM" 0,05% |
| Max. process pressure | max. 420 bar (max. 6 091 psi) |
| Medium temperature range | Temperature gradient from pressure piping |
| Display/Operation | Option |
| Outputs | 4...20mA HART PROFIBUS PA FOUNDATION Fieldbus |
| Digital communication | HART PROFIBUS PA FOUNDATION Fieldbus |
| Hazardous area approvals | ATEX, FM, CSA, IECEx, INMETRO, NEPSI, TIIS |
| Functional safety | SIL |
| Material certificates | NACE MR0103 NACE MR0175 EN10204-3.1 |
Liquids
| Measuring Principle | Differential pressure |
| Product headline | Digital transmitter with metallic measuring diaphragms Modular transmitter Long-term stability High static pressure/Overload resistance Enhanced safety via self diagnostic functions Secondary process barrier |
| Max. measurement error | 0,075% "PLATINUM" 0,05% |
| Max. process pressure | max. 420 bar (max. 2175 psi) |
| Medium temperature range | Temperature gradient from pressure piping |
| Display/Operation | Option |
| Outputs | 4...20mA HART PROFIBUS PA FOUNDATION Fieldbus |
| Digital communication | HART PROFIBUS PA FOUNDATION Fieldbus |
| Hazardous area approvals | ATEX, FM, CSA, IECEx, INMETRO, NEPSI, TIIS |
| Functional safety | SIL |
| Material certificates | NACE MR0103 NACE MR0175 EN10204-3.1 |
Pressure
| Measuring Principle | Differential pressure |
| Characteristic | Digital transmitter with metallic measuring diaphragms Modular transmitter Long-term stability High static pressure/Overload resistance Secondary process barrier |
| Supply voltage | 4...20 mA HART 10,5...45V DC (Non Ex): Ex ia: 10,5...30V DC PROFIBUS PA: 9...32 V DC (Non Ex) FOUNDATION Fieldbus: 9...32 V DC (Non Ex) |
| Reference Accuracy | Standard: 0.05% Platinum: up to 0.035% |
| Long term stability | 0.03 % of URL/ year 0.05 % of URL/ 5 years 0.08 % of URL/ 10 years |
| Process temperature | -40°C...85°C (-40°F...185°F) |
| Ambient temperature | -50°C...85°C (-58°F...185°F) |
| Measuring cell | 10 mbar...250 bar (0.15 psi...3750 psi) |
| Smallest calibratable span | 1 mbar (0.015 psi) |
| Vacuum resistance | 50 mbar (0.73 psi) |
| Max. Turn down | 100:1 |
| Max. overpressure limit | On one side: 420 bar (6300psi) |
| Process connection | 1/4-18NPT RC1/4" |
| Material process membrane | 316L, AlloyC, Tantal, Gold-Rhodium |
| Material gasket | Viton, PTFE, EPDM, NBR |
| Fill fluid | Silicone oil Inert oil |
| Material housing | 316L, Die-cast aluminum |
| Communication | 4...20 mA HART PROFIBUS PA FOUNDATION Fieldbus |
| Certificates / Approvals | ATEX, FM, CSA, CSA C/US, IEC Ex, INMETRO, NEPSI, EAC, UK Ex |
| Safety approvals | SIL |
| Design approvals | NACE MR0103 EN10204-3.1 |
| Marine approvals | GL/ ABS |
| Specialities | Diagnostic functions |
| Successor | PMD75B |
Steam
| Measuring Principle | Differential pressure |
| Product headline | Digital transmitter with metallic measuring diaphragms Modular transmitter Long-term stability High static pressure/Overload resistance Enhanced safety via self diagnostic functions Secondary process barrier |
| Max. measurement error | 0,075% "PLATINUM" 0,05% |
| Max. process pressure | max. 420 bar (max. 6091 psi) |
| Medium temperature range | Temperature gradient from pressure piping |
| Display/Operation | Option |
| Outputs | 4...20mA HART PROFIBUS PA FOUNDATION Fieldbus |
| Digital communication | HART PROFIBUS PA FOUNDATION Fieldbus |
| Hazardous area approvals | ATEX, FM, CSA, IECEx, INMETRO, NEPSI, TIIS |
| Functional safety | SIL |
| Material certificates | NACE MR0103 NACE MR0175 EN10204-3.1 |
Areas of application
The Deltabar PMD75 differential pressure transmitter with piezoresistive sensor and welded metal diaphragm is used for the continuous measurement of liquids, steam and gases in all industries. Three-key operation enables simple and reliable commissioning and operation. The integrated HistoROM data module allows easy management of process and device parameters. Designed according to IEC 61508 for SIL2/3 safety applications.
For level, volume or mass measurement of liquids, differential pressure monitoring, and flow measurement (volume or mass flow) together with primary elements in gases, steam and liquids.
Process connection: thread
Process temperature: -40 to +85°C (-40 to +185°F)
Measuring range: 0.25mbar to 40bar (0.0036 to 600psi)
Accuracy: ±0.05%, “platinum” ±0.035% (optional)
International explosion protection certificate, overflow protection WHG, SIL, hygienic approval, marine approval
Advantages
Optimum accuracy, reproducibility and long-term stability
Certified to IEC 61508, hermetically sealed feedthrough provides the highest SIL2/3 safety
Simple menu-guided commissioning via local display, 4 to 20mA HART, PROFIBUS PA, FOUNDATION fieldbus
HistoROM data management concept for fast and easy commissioning, maintenance and diagnostics
Cost savings through the modular concept, easy replacement of sensor, display or electronics
Overload resistance up to 420bar/42MPa/6300psi, function monitored
Seamless and independent system integration (HART/PA/FF)
Spare Parts & Accessories 142
142 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 52022418 | key housingfor external operation consists of: push buttons, cover + screws | Details |
| 52022419 | key housingfor external operation consists of: push buttons, cover + screws colour: light grey | Details |
| 52024110 | key housingfor external operation consists of: push button, cover + screws colour: dark grey | Details |
| 52020760 | cable glandconsists of: cable gland M20 O-ring 18.72x2.62 VMQ Cerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 Deltapilot S FMB70 | Details |
| 52020761 | cable entryconsists of: gasket 18.72x2.51 NBR adapter M20 > G1/2 O-ring 18.77x1.78 NBR Cerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 Deltapilot S FMB70 | Details |
| 52020762 | plug connectorHarting plug set Cerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 Deltapilot S FMB70 | Details |
| 52020763 | plug connectorCerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 Deltapilot S FMB70 | Details |
| 71111056 | Atmospheric compensation filter portConsists of: Vent screw 304. Pressure compensation filter. O-ring EPDM, protection lid. Usage: FMB50, FMB51, FMB52, FMB53, FMD71, FMD72, FMD76, FMD77, FMD78, FMR60B, FMR62B, FMR63B, FMR66B, FMR67B, PMC51, PMC71, PMD70, PMD75, PMP71, PMP75, PMP51, PMP55. | Details |
| 71219639 | Atmospheric compensation filter portConsists of: vent screw 304. Pressure compensation filter. O-ring VMQ, protection lid. Usage: housing T17, FMB70, FMD76/FMD77/FMD78, PMC71, PMD70/PMD75, PMP71/ PMP75. Housing F15 at B1,BB,BD,BF,GA,ID,I1, FMB50/FMB51/FMB52/FMB53, PMC51, PMP51/PMP55. | Details |
| 71043886 | CableConnection cable sensor>sep. housing. Usage: FMB50/FMB51/FMB52, FMB70, FMD76/FMD77/FMD78, PMC51, PMC71, PMD70/PMD75, PMP51/PMP55, PMP71/PMP75. | Details |
| 71043888 | CableConnection cable sensor>sep. housing. Usage: FMB50/FMB51/FMB52, FMB70, FMD76/FMD77/FMD78, PMC51, PMC71, PMD70/PMD75, PMP51/PMP55, PMP71/PMP75. | Details |
| 71043889 | CableConnection cable sensor>sep. housing. Usage: FMB50/FMB51/FMB52, FMB70, FMD76/FMD77/FMD78, PMC51, PMC71, PMD70/PMD75, PMP51/PMP55, PMP71/PMP75. | Details |
| 71070738 | CableConnection cable sensor>sep. housing. Usage: FMB50/FMB51/FMB52, FMB70, FMD76/FMD77/FMD78, PMC51, PMC71, PMD70/PMD75, PMP51/PMP55, PMP71/PMP75. | Details |
| 52020429 | Seal ring assemblyconsists of: 5x O-ring 75,87x2.62, EPDM, PTFE, FDA | Details |
| 52020432 | Aluminum cover with gasketMaterial: Aluminium, coated O-ring EPDM, FDA not for EEx d/XP Cerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 Deltapilot S FMB70 | Details |
| 52020433 | Aluminum cover with gasketMaterial: Aluminium, coated O-ring EPDM, FDA for EEx d/XP Cerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 | Details |
| 52028309 | ***Cover T14 316L, Ex d, sight glass, EPDMMaterial: 316L Sight glass: mineral glass O-ring EPDM, FDA individual tested, EEx d/XP Cerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 | Details |
| 52028310 | Stainless Steel CoverMaterial: 316L O-ring EPDM, FDA individual tested, EEx d/XP Cerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 | Details |
| 71002774 | Stainless Steel CoverMaterial: 316L flat gasket VMQ, centering ring, screw not for EEx d/XP Cerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 Deltapilot S FMB70 | Details |
| 71002810 | cover with viewing windowMaterial: 316L Sight glass: mineral glass flat gasket VMQ, centering ring, screw approval 2,3,4,8,Q,W,7,8 Cerabar S PMC71, PMP71/PMP75 Deltabar S PMD70/PMD75,FMD76/FMD77/FMD78 Deltapilot S FMB70 | Details |
Configurator / Comparison
Orifice plate flowmeter measuring principle video
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Pitot tube flowmeter measuring principle video
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Case Studies
Municipal Wastewater Treatment · Differential Pressure Measurement — Application Case
Project Overview
The site is the inlet, biological and outlet stages of a municipal plant. The customer wanted Differential Pressure Measurement properly configured on the existing plant, with the aim of differential pressure for flow and filter monitoring.
Technical Challenges
What actually causes trouble is high solids and corrosive fractions, with large diurnal flow swings, and effluent parameters drift and probes foul with sludge and biofilm. All of this means the Differential Pressure Measurement configuration has to involve checking static pressure limit, overload margin and impulse lines.
Configuration
Supply and installation were organised through the pressure range: pressure solution matched to process pressure and temperature. On site this meant checking static pressure limit, overload margin and impulse lines, checked line by line against: stable compliance with Grade 1A discharge limits and online data reporting.
Performance
After commissioning the outcome is filters changed on pressure drop, using cartridges to their full life, and the readings are now used for process tuning.
Food & Beverage · Differential Pressure Measurement — Application Case
Site Conditions
This is a Food & Beverage customer whose plant is at dosing, pasteurising, filling and CIP stages. The main task was differential pressure for flow and filter monitoring.
The Problem
The difficulty lies in syrups, dairy and beverages that scale easily, under strict hygienic requirements; at the same time frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. Specification therefore means checking static pressure limit, overload margin and impulse lines.
What We Did
We took a pressure range approach — pressure solution matched to process pressure and temperature. Delivery was built around checking static pressure limit, overload margin and impulse lines, with point-by-point checks on: food-safety and hygienic design per 3-A / EHEDG.
Operating Outcome
In service the system performs as intended — filters changed on pressure drop, using cartridges to their full life, with routine maintenance falling noticeably.
Chemical & Pharmaceutical · Differential Pressure Measurement — Application Case
Application Context
reactors, metering vessels and finished-product tanks is a typical Chemical & Pharmaceutical duty. The project started from Differential Pressure Measurement, focusing on differential pressure for flow and filter monitoring.
Process Constraints
corrosion plus Ex protection shortens instrument life and makes downtime costly, and highly corrosive media with solvents and crystallisation, partly in explosive atmospheres only amplify it. The Differential Pressure Measurement specification must therefore cover checking static pressure limit, overload margin and impulse lines.
Delivery Approach
Delivery was handled as the pressure range — pressure solution matched to process pressure and temperature. Execution centred on checking static pressure limit, overload margin and impulse lines, together with Ex certification and GMP traceability of records.
Field Results
Operation shows the benefit clearly — filters changed on pressure drop, using cartridges to their full life, with confidence in this measuring point improving markedly.
Power & Energy · Differential Pressure Measurement — Application Case
Customer Profile
The typical setting in Power & Energy is boiler feedwater, turbine condensate and FGD/DeNOx systems. The measuring point is Differential Pressure Measurement; the focus is differential pressure for flow and filter monitoring.
Key Difficulties
Conditions are high temperature and pressure with both steam and saline water and, on top of that, drift under high temperature and pressure, with very costly unplanned outages, which a standard configuration cannot handle for long. The design therefore starts with checking static pressure limit, overload margin and impulse lines.
Implementation
The scope ran through the pressure range: pressure solution matched to process pressure and temperature. Technically it hinges on checking static pressure limit, overload margin and impulse lines, and on these requirements: compliance with power-industry codes and unit availability targets.
Customer Benefit
In practice this means filters changed on pressure drop, using cartridges to their full life, which cut the workload on the site maintenance team.
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