Technical Data
CompareContinuous / Liquids
| Measuring Principle | Differential pressure |
| Characteristic / Application | Digital transmitter with metallic measuring diaphragms Compact size Modular transmitter Long-term stability |
| Supply / Communication | 4...20mA HART: 11,5...45V DC Ex ia: 11,5...30V DC |
| Accuracy | 0,1% "PLATINUM" 0,075% |
| Long term stability | 0,05% of URL/year 0,125% of URL/5 years |
| Ambient temperature | -40°C...85°C (-40°F...185°F) |
| Process temperature | -40 °C...85 °C (-40 °F...185 °F) |
| Process pressure / max. overpressure limit | 160 bar |
| Pressure measuring range | 10mbar...40bar (0.15...580psi) |
| Main wetted parts | 316L |
| Process connection | 1/4-18 NPT |
| Communication | 4...20mA HART PROFIBUS PA FOUNDATION Fieldbus |
| Certificates / Approvals | ATEX, FM, CSA, CSA C/US, IEC Ex, INMETRO, NEPSI |
| Safety approvals | SIL |
| Design approvals | EN 10204-3.1 NACE MR0175, MR0103 AD2000 |
| Options | 4-line digital display Aluminium housing |
| Successor | PMD55B |
| Application limits | Measuring cell: Metal welded |
Gas
| Measuring Principle | Differential pressure |
| Product headline | Digital transmitter with metallic measuring diaphragms Compact size Modular transmitter Long-term stability |
| Max. measurement error | 0,1% "PLATINUM" 0,075% |
| Max. process pressure | 10mbar...40bar (0.15...580psi) |
| Medium temperature range | Temperature gradient from pressure piping |
| Display/Operation | Option |
| Outputs | 4...20mA HART |
| Digital communication | HART |
| 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 Compact size Modular transmitter Long-term stability |
| Max. measurement error | 0,1% "PLATINUM" 0,075% |
| Max. process pressure | 10 mbar...40 bar (0.15...580 psi) |
| Medium temperature range | Temperature gradient from pressure piping |
| Display/Operation | Option |
| Outputs | 4...20mA HART |
| Digital communication | HART |
| 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 Compact size Modular transmitter Long-term stability |
| Supply voltage | 4...20 mA HART 11,5...45V DC (Non Ex): Ex ia: 11,5...30V DC PROFIBUS PA: 9...32 V DC (Non Ex) FOUNDATION Fieldbus: 9...32 V DC (Non Ex) |
| Reference Accuracy | Standard 0.1% Platinum 0.075% |
| Long term stability | 0.05% of URL/ year 0.13% of URL/ 5 years 0.23% of URL/ 10 years |
| Process temperature | -40°C...+85°C (-40°F...+185°F) |
| Ambient temperature | -40°C...+85°C (-40°F...+185°F) |
| Measuring cell | 10 mbar...40 bar (0.15...580 psi) |
| Smallest calibratable span | 10 mbar (0.15 psi) |
| Max. Turn down | 20:1 |
| Max. overpressure limit | on one side: 160 bar (2300 psi) |
| Process connection | 1/4-18 NPT |
| Material process membrane | 316L, AlloyC, |
| Material gasket | Viton, PTFE, EPDM, NBR |
| Fill fluid | Silicone oil Inert oil |
| Material housing | Die-cast aluminum |
| Communication | 4...20 mA HART PROFIBUS PA FOUNDATION Fieldbus |
| Certificates / Approvals | ATEX, FM, CSA, CSA C/US, IEC Ex, INMETRO, NEPSI, UK Ex |
| Safety approvals | SIL |
| Design approvals | NACE MR0175 EN10204-3.1 |
| Successor | PMD55B |
Steam
| Measuring Principle | Differential pressure |
| Product headline | Digital transmitter with metallic measuring diaphragms Compact size Modular transmitter Long-term stability |
| Max. measurement error | 0,1% "PLATINUM" 0,075% |
| Max. process pressure | 10mbar...40bar (0.15...580psi) |
| Medium temperature range | Temperature gradient from pressure piping |
| Display/Operation | Option |
| Outputs | 4...20mA HART |
| Digital communication | HART |
| Hazardous area approvals | ATEX, FM, CSA, IECEx, INMETRO, NEPSI, TIIS |
| Functional safety | SIL |
| Material certificates | NACE MR0103 NACE MR0175 EN10204-3.1 |
The Deltabar PMD55 differential pressure transmitter uses a piezoresistive sensor and a welded metal diaphragm and is mainly used for differential pressure measurement of liquids, steam and gases in the process industry or the environmental protection industry. The measuring range is adjustable, and fast setup simplifies commissioning, reduces costs and saves time. It complies with IEC61508/IEC61511 and meets SIL3 safety requirements.
Advantages
Reference accuracy: 0.1%, Platinum version: up to ±0.075%
Turndown ratio: 100:1 or higher
One-piece transmitter
Fast commissioning using DIP switches
Simple, safe menu-guided operation: - via the on-site display module: - via 4...20 mA HART - via PROFIBUS PA, - via FF FOUNDATION Fieldbus
Modular continuous measurement of differential pressure, static pressure and pressure (Deltabar M - Deltapilot M, Cerabar M), e.g. - replaceable display, - universal electronics for pressure and differential pressure measurement
Wide range of approvals for international use
Application areas
For liquid level, volume or mass measurement, differential pressure monitoring of filters and pumps, and, in combination with primary elements, measurement of gas, steam and liquid flow (volume flow or mass flow)
Process connection: thread
Process temperature: -40... 85°C (-40... 185°F)
Measuring range: 0.5mbar ... 40bar (0.0072 ... 600psi)
Accuracy: ±0.1%, "Platinum" ±0.075% (optional)
International explosion protection approval, SIL
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Technical documentation
Technical data
Documents / Manuals / Software
Accessories / Spare parts
Orifice plate flowmeter measuring principle video
Pitot tube measuring principle video
Source:Endress+Hauserpublic information from the website
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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