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
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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。
