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
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Reference accuracy: 0.1%, Platinum version: up to ±0.075%
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Turndown ratio: 100:1 or higher
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One-piece transmitter
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Fast commissioning using DIP switches
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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
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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)
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Process connection: thread
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Process temperature: -40... 85°C (-40... 185°F)
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Measuring range: 0.5mbar ... 40bar (0.0072 ... 600psi)
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Accuracy: ±0.1%, "Platinum" ±0.075% (optional)
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International explosion protection approval, SIL
Spare Parts & Accessories 38
38 spare parts · click to collapse
| Order code | Description | |
|---|---|---|
| 71092705 | Aluminum coverMaterial: aluminium. O-ring: EPDM. Not for Ex d/XP. Usage: FMB50/FMB51/FMB52/FMB53, FTC260/FTC262, PMC51, PMD55, PMP51/PMP55. | Details |
| 71092706 | Aluminum coverMaterial: aluminium. O-ring: EPDM. Individual tested, Ex d/XP. Usage: PMC51, PMD55, PMP51/PMP55. | Details |
| 71092707 | Aluminum coverMaterial: aluminium. Sight glass: mineral glass. O-ring: EPDM. Not for Ex d/XP. Usage: FMB50/FMB51/FMB52/FMB53, FTC260/FTC262, PMC51, PMD55, PMP51/PMP55. | Details |
| 71092708 | Aluminum coverMaterial: aluminium. Sight glass: mineral glass. O-ring: EPDM. Individual tested, Ex d/XP. Usage: PMC51, PMD55, PMP51/PMP55. | Details |
| 52020429 | Seal ring assemblyconsists of: 5x O-ring 75,87x2.62, EPDM, PTFE, FDA | Details |
| 52005984 | plug connectorwith gasket for Aluminium and stainless steel housing | Details |
| 52020763 | plug connectorCerabar 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 |
| 71092709 | cable glandConsists of: cable gland M20, synthetic. O-ring 17.0x2.0 EPDM + PTFE/FDA. Usage: housing F30/31, FMB50/FMB51/FMB52/FMB53, PMC51, PMD55, PMP51/PMP55. | Details |
| 71092711 | cable glandConsists of: cable gland M20, metal. O-ring 17.0x2.0 EPDM + PTFE/FDA. Usage: housing F15/F31, FMB50/FMB51/FMB52/FMB53, PMC51, PMP51/PMP55, housing F30 PMD55. | Details |
| 71092712 | cable entryConsists of: gasket 18.72x2.51 NBR 70. Adapter M20 > G1/2. Not for Ex d. Usage: FMB50/FMB51/FMB52/FMB53, PMC51, PMD55, PMP51/PMP55. | Details |
| 71120017 | plug valve connectorConsists of: plug, seal, screw. Usage: FMB50/FMB51/FMB52/FMB53, PMC51, PMD55, PMP51/PMP55. | Details |
| 71290825 | Grounding terminalConsists of: spring washer, screw, earth handle, clamp. Usage: housing T14/T15/T17, FMB70, FMD71/FMD72/ FMD77/FMD78, PMC71, PMP71/PMP75, PMD70/PMD75. Housing F30/F31, FMB50/FMB51/FMB52/ FMB53, PMC51, PMD55, PMP51/PMP55. | Details |
| XPP0001- | Electronic module FMB5x, PMC51, PMP5x, PMD55 | Enquire |
| 71091670 | Display moduleDigital display, 3 push buttons, snapped bracket. Usage: FMB50/FMB51/FMB52/FMB53, PMC51, PMD55, PMP51/PMP55. | Details |
| 71094113 | Display mounting bracketUsage: display module VU340, FMB50/FMB51/FMB52/FMB53, PMC51, PMD55, PMP51/PMP55. | Details |
| 71092699 | gasketConsists of: 2x O-ring 44.0x3.0 FKM. Process gasket FKM Viton. 2x flat gasket EPDM. Usage: housing > flange PMD55. | Details |
| 71092700 | washerConsists of: 2x gasket 45,3x49,55x3,1 PTFE. Process gasket PTFE. 2x flat seal EPDM. Usage: housing>flange PMD55. | Details |
| 71092701 | gasketConsists of: 2x O-ring 44.0x3.0 FKM. Process gasket NBR. 2x flat gasket EPDM. Usage: housing > flange PMD55. | Details |
| 71092702 | gasketConsists of: 2x O-ring 44.0x3.0 EPDM. Process gasket EPDM. 2x flat seal EPDM. Usage: housing > flange PMD55. | Details |
Configurator / Comparison
Accessories / Spare parts
Orifice plate flowmeter measuring principle video
Click to play
Pitot tube measuring principle video
Click to playSource:Endress+Hauserpublic information from the website
Manuals & Documents 12
All documents for this model12 documents · click to expand
Cerabar M, Deltabar M, Deltapilot M HART (V 01.00.zz) Chinese
操作手册 Cerabar M PMC51, PMP51, PMP55 Deltabar M PMD55 Deltapilot M FMB50/51/52/53 Chinese
Cerabar M / Deltabar M / Deltapilot M, Operating Instructions FOUNDATION Fieldbus Chinese
Cerabar M /Deltabar M /Deltapilot M Operating Instructions PROFIBUS PA Chinese
Cerabar M, Deltabar M, Deltapilot M HART (V 01.00.zz) English
Cerabar M / Deltabar M / Deltapilot M, Operating Instructions FOUNDATION Fieldbus English
Cerabar M /Deltabar M /Deltapilot M Operating Instructions PROFIBUS PA English
TI Deltabar M PMD55 Chinese
Deltatop DP61D, DP62D, DP63D Chinese
Deltatop DO61W, DO62C, DO63C, DO64P, DO65F Chinese
TI Deltabar M PMD55 English
Deltatop English
Product Videos
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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