 
                  Specs at a glance
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                              Accuracy0.075% of individual sensor, 
 "PLATINUM" 0.05% of individual sensor
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                              Process temperature–25...+150°C 
 (–13...+302°F)
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                              Pressure measuring range100mbar...40bar 
 (1.5psi...600psi)
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                              Process pressure / max. overpressure limit60 bar (900 psi) 
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                              Material process membraneCeramic 
 316L, AlloyC
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                              Measuring cell100 mbar...40 bar 
 (1.5 psi...600 psi)
Field of application
The electronic dp Deltabar FMD71 is a differential pressure system, used to measure the pressure or level, volume or mass of liquids in pressurized tanks or distillation columns/evaporators. The high pressure sensor (HP) measures the hydrostatic pressure. The low pressure sensor (LP) measures the head pressure. The level is calculated in the transmitter using these two digital values. The electronic dp system eliminates issues of traditional differential pressure measurements.
For differential pressure, level, volume or mass measurement of liquids in pressurized tanks and distillation columns/evaporators.
- Process connections: Threads, flanges and hygienic connections 
- Process temperature: -40 up to +150°C (-40 to +302°F) 
- Measuring range: 100mbar to +40bar (6 to 600psi) 
- Accuracy: Single sensor up to ±0.05%, system up to ±0.07% 
- International explosion protection certificates, hygienic approvals 
Benefits
- Eliminates traditional mechanical issues resulting in greater process availability and reliability 
- Overload-resistant high purity ceramic sensor (99.9% Al2O3) 
- Safety risks are minimized with the new electronic differential pressure system architecture and design 
- Lowest total cost of ownership due to reduced installation time, maintenance, downtime and spare requirements 
- Multivariable level measurement: HART-based differential pressure, head pressure and sensor temperatures from one system 
- Continuous health indication of the entire system via HART-based diagnostic 
- High reproducibility and long-term stability 
Videos
Extended selection
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        High-end products 
- Highly functional and convenient
Technical excellence
Simplicity
 
                              - 
        Standard products 
- Reliable, robust and low-maintenance
Technical excellence
Simplicity
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        Specialized products 
- Designed for demanding applications
Technical excellence
Simplicity
Variable
| FLEX selections | Technical excellence | Simplicity | 
|---|---|---|
| 
 Fundamental selection Meet your basic measurement needs | Technical excellence | Simplicity | 
| 
 Lean selection Handle your core processes easily | Technical excellence | Simplicity | 
| 
 Extended selection Optimize your processes with innovative technologies | Technical excellence | Simplicity | 
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 Xpert selection Master your most challenging applications | Technical excellence | Simplicity Variable | 
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                                                    Operating Instruction (BA)
 Deltabar FMD71, FMD72 Operating InstructionsEnglish version - 02/2018 Electronic differential pressure transmitter for level measurement EN 26/02/201808/06/201514/04/201415/11/201301/08/2012Language: English Version: 26/02/2018 File size: 3.4 MB File name: BA01044PEN_0617.pdf 
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                                                    Explosion Protection
 Product family: Cerabar, Cerabar M, Cerabar S, Deltabar, Deltabar M, Deltabar S, Deltapilot M, Deltapilot S, Gammapilot, Levelflex, Liquicap M, Liquiphant, Liquiphant FailSafe, Liquiphant M, Liquiphant S, Micropilot, Soliphant M, Spare parts level, System & Gaugin gEnglish version - 03/2025 Product root: FHX50-, FMB50-, FMB51-, FMB52-, FMB53-, FMB70-, FMD71-, FMD72-, FMD77-, FMD78-, FMG50-, FMI51-, FMI52-, FMP50-, FMP51- , FMP52-, FMP53-, FMP54-, FMP55-, FMP56-, FMP57-, FMR50-, FMR51-, FMR52-, FMR53-, FMR54-, FMR56-, FMR57-, FMR60-, FMR60B-, FMR62-, F MR62B-, FMR63B-, FMR66B-, FMR67-, FMR67B-, FTI51-, FTI52-, FTL41-, FTL50-, FTL50H-, FTL51-, FTL51B-, FTL51C-, FTL51H-, FTL62-, FTL63 -, FTL64-, FTL70-, FTL71-, FTL80-, FTL81-, FTL85-, FTM50-, FTM51-, FTM52-, NMR81-, NMR84-, NRF81-, PMC51-, PMC51B-, PMC71-, PMC71B-, PMD50-, PMD55-, PMD55B-, PMD75-, PMD75B-, PMD78B-, PMP43-, PMP50-, PMP51-, PMP51B-, PMP55-, PMP71-, PMP71B-, PMP75- Region: United Arab Emirates Approval agency: Intertek Protection: Ex d, Ex e, Ex i, Ex m, Ex t, Ex n Language: English Version: 28/03/2025 File size: 20.6 MB File name: 25-03-23825_Q25-01-049912_NB0007-1.pdf 
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                                                            Technical Information (TI)
 TI Weld-in adapter, process adapter and flangesLevel, pressure and temperature measurement EN 06/12/202425/03/202415/09/202328/10/202130/07/2021Language: English Version: 06/12/2024 File size: 1.3 MB File name: TI00426FEN_2624.pdf 
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                                                            Technical Information (TI)
 TI Deltabar FMD71, FMD72Level measurement with electronic differential pressure 
 HARTEN 18/11/202401/04/202406/10/202126/02/201808/06/2015Language: English Version: 18/11/2024 File size: 2.3 MB File name: TI01033PEN_0924-00.pdf 
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                                                            Operating Instruction (BA)
 Deltabar FMD71, FMD72 Operating InstructionsElectronic differential pressure transmitter for level measurement EN 26/02/201808/06/201514/04/201415/11/201301/08/2012Language: English Version: 26/02/2018 File size: 3.4 MB File name: BA01044PEN_0617.pdf 
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                                                            Device Parameter (GP)
 Deltabar FMD71, FMD72 Description of Device ParametersElectronic differential pressure transmitter for level measurement EN 26/02/201808/06/201514/04/201415/11/201301/08/2012Language: English Version: 26/02/2018 File size: 711.1 KB File name: GP01013PEN_0617.pdf 
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                                                            Short Instruction (KA)
 Conversion instructions Cerabar S PMC/PMP7x and Deltabar S PMD/FMD7x from software version 1.x to software Version 2.x or higherConversion instructions Cerabar S PMC/PMP7x and Deltabar S 
 PMD/FMD7x from software version 1.x to software Version 2.x or higherEN 19/05/2021Language: English Version: 19/05/2021 File size: 2.3 MB File name: KA00615PA2_0108.pdf 
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                                                            Short Instruction (KA)
 Cerabar S, Deltabar S, Deltapilot S - Exchange of the push buttonsCerabar S, Deltabar S, Deltapilot S - Exchange of the push buttons EN 17/05/2021Language: English Version: 17/05/2021 File size: 396.6 KB File name: KA00610PA2_0312.pdf 
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                                                            Short Instruction (KA)
 Deltabar FMD71, FMD72 Brief Operating InstructionsElectronic differential pressure transmitter for level measurement EN 26/02/201808/06/201514/04/201423/10/201320/07/2012Language: English Version: 26/02/2018 File size: 2 MB File name: KA01105PEN_0617.pdf 
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                                                            Installation Instructions (EA)
 Plug M12 Installation instructionsDeltabar EN 05/08/2016Language: English Version: 05/08/2016 File size: 406.7 KB File name: EA01175PA2_0116.pdf 
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                                                            Installation Instructions (EA)
 Installation instruction - Ground terminal T14/T15/T17, F30/F31Cerabar S, Deltabar S, Deltabar, Cerabar M, Deltabar M, Deltapilot M EN 22/06/2015Language: English Version: 22/06/2015 File size: 282.8 KB File name: EA01131PA2_0115.pdf 
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                                                            Installation Instructions (EA)
 Screw setCerabar PMC51B, PMC71B 
 Cerabar M PMC51, Cerabar S PMC71
 Deltabar FMD71EN 31/03/2020Language: English Version: 31/03/2020 File size: 129.1 KB File name: EA01296PEN_0120.pdf 
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