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
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Accessories/Spare parts
Orifice plate flowmeter measuring principle video
Pitot tube flowmeter measuring principle video
Source:Endress+Hauserwebsite public information
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 |
Related Models
| Model | Name |
|---|---|
| PMD75-5BA7F11DAAA+N5PJ | 差压变送器 |
| PMD75-5CG7DE1DCAU+JTL8 | 差压变送器 |
| PMD75-ABJ7HE1DCBA | 差压变送器 |
| PMD75-ACA7BB1DAUA | 差压变送器 |
| PMD75-HCA7L21BAEU | 差压变送器 |
Case Studies
市政污水处理污水处理厂 · 差压测量应用案例
项目背景
市政污水处理客户在污水处理厂环节，长期面临「出水水质监测精度不足、仪表易受污染导致数据漂移，影响达标排放」的困扰，对差压测量的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的差压测量，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应市政污水处理复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
食品饮料食品生产线 · 差压测量应用案例
项目背景
食品饮料客户在食品生产线环节，长期面临「卫生级测量要求高，在线仪表需耐 CIP/SIP 清洗且精度稳定」的困扰，对差压测量的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的差压测量，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应食品饮料复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
化工制药反应釜与储罐 · 差压测量应用案例
项目背景
化工制药客户在反应釜与储罐环节，长期面临「介质腐蚀性强、工况复杂，仪表需耐腐蚀且防爆」的困扰，对差压测量的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的差压测量，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应化工制药复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
电力能源电厂锅炉与汽机 · 差压测量应用案例
项目背景
电力能源客户在电厂锅炉与汽机环节，长期面临「高温高压工况下测量不稳定，维护停机成本高」的困扰，对差压测量的稳定性与测量精度提出了更高要求。
解决方案
阿仪科技技术团队结合现场工况，为客户选配了适配的差压测量，并完成选型、安装、调试与整定的一站式交付。
实施效果
- 测量精度与响应速度显著提升，数据稳定可靠；
- 仪表适应电力能源复杂工况，维护量大幅降低；
- 助力客户实现连续在线监测与降本增效，获得客户高度认可。
