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)
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Technical documentation
Technical data
Documents/Manuals/Software
Accessories/Spare parts
Orifice plate flowmeter measuring principle video
Pitot tube flowmeter measuring principle video
Source:Endress+Hauserwebsite public information
Case Studies
Municipal Wastewater Treatment — Wastewater Treatment Plant · Differential Pressure Measurement Application Case
Project Background
Municipal Wastewater Treatment customers at the Wastewater Treatment Plant stage have long faced the challenge of insufficient accuracy in effluent quality monitoring and instruments prone to contamination causing data drift, affecting compliance discharge, placing higher demands on the stability and measurement accuracy of Differential Pressure Measurement.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Differential Pressure Measurement for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Municipal Wastewater Treatment conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Food & Beverage — Food Production Line · Differential Pressure Measurement Application Case
Project Background
Food & Beverage customers at the Food Production Line stage have long faced the challenge of high hygienic measurement requirements, with inline instruments needing to withstand CIP/SIP cleaning while maintaining stable accuracy, placing higher demands on the stability and measurement accuracy of Differential Pressure Measurement.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Differential Pressure Measurement for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Food & Beverage conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Chemical & Pharmaceutical — Reactors and Storage Tanks · Differential Pressure Measurement Application Case
Project Background
Chemical & Pharmaceutical customers at the Reactors and Storage Tanks stage have long faced the challenge of highly corrosive media and complex conditions, requiring corrosion-resistant and explosion-proof instruments, placing higher demands on the stability and measurement accuracy of Differential Pressure Measurement.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Differential Pressure Measurement for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Chemical & Pharmaceutical conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
Power & Energy — Power Plant Boiler and Turbine · Differential Pressure Measurement Application Case
Project Background
Power & Energy customers at the Power Plant Boiler and Turbine stage have long faced the challenge of unstable measurement under high temperature and pressure, with high maintenance and downtime costs, placing higher demands on the stability and measurement accuracy of Differential Pressure Measurement.
Solution
Based on the on-site conditions, the Ainstru technical team selected suitable Differential Pressure Measurement for the customer and delivered one-stop service covering selection, installation, commissioning and tuning.
Results
- Measurement accuracy and response speed significantly improved, with stable and reliable data;
- Instruments adapt to complex Power & Energy conditions, greatly reducing maintenance;
- Helping customers achieve continuous online monitoring and cost reduction, highly recognized by customers.
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