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Electronic differential pressure Deltabar FMD71

Electronic differential pressure system utilizing two ceramic sensor modules and one transmitter

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Electronic differential pressure Deltabar FMD71

Electronic differential pressure system utilizing two ceramic sensor modules and one transmitter

Get a quote
Office situation support
Have questions about this product?

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
FLEXible answers to individual needs
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Electronic differential pressure Deltabar FMD71

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FLEX selections
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Fundamental selection Meet your basic measurement needs
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Lean selection Handle your core processes easily
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Extended selection Optimize your processes with innovative technologies
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Xpert selection Master your most challenging applications
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Manufacturer's warranty

Engineered for confidence

Our instruments are designed for long‑lasting performance, precise measurement, and dependable operation in demanding industrial environments. Each product includes a standard manufacturer’s warranty that reflects our commitment to quality and to the trust you place in our solutions.

Should a warranty case occur, the device will be assessed and the applicable remedy will be provided in line with the warranty terms – helping ensure a reliable and efficient resolution and supporting continued operation of your measurement point.

Request for extended warranty

If you require extended warranty coverage, simply contact your local Endress+Hauser representative. Our experts will advise you on the available options to match your application and risk profile, helping you protect your investment, reduce unexpected repair costs, and ensure reliable long‑term operation beyond the manufacturer's warranty period.

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Warranty terms apply

The manufacturer's warranty and extended warranty are subject to specific conditions. For full details, please refer to the locally applicable General Terms and Conditions (GTC), which can be found on the respective country page of our website.

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Endress+Hauser’s qualified service engineers ensure your measurement devices are commissioned right the first time, delivering application‑aligned accuracy, regulatory compliance, and operational confidence from startup onwards, anywhere in the world.

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With Endress+Hauser Smart Support, you benefit from faster issue resolution, higher uptime, reliable global expertise across the entire product lifecycle – and lasting peace of mind.

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Product information

Deltabar FMD71 - Electronic differential pressure
Electronic dp - Deltabar FMD71
Specifications
Pressure
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Description

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.

Field of application

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
Downloads
Most downloaded
Technical Information (TI)
TI Deltabar FMD71, FMD72 Level measurement with electronic differential pressure
HART
English version - 11/2024
Download
Operating Instruction (BA)
Deltabar FMD71, FMD72 Operating Instructions Electronic differential pressure transmitter for level measurement
English version - 02/2018
Download
Technical Information (TI)
TI Weld-in adapter, process adapter and flanges Level, pressure, temperature
English version - 06/2026
Download
The CAD Drawings will be available after the configuration.
All downloads
115 Downloads
Technical Information (TI)
TI Weld-in adapter, process adapter and flanges Level, pressure, temperature
English version - 06/2026
Download
Technical Information (TI)
Most downloaded
TI Deltabar FMD71, FMD72 Level measurement with electronic differential pressure
HART
English version - 11/2024
Download
Operating Instruction (BA)
Most downloaded
Deltabar FMD71, FMD72 Operating Instructions Electronic differential pressure transmitter for level measurement
English version - 02/2018
Download
Device Parameter (GP)
Deltabar FMD71, FMD72 Description of Device Parameters Electronic differential pressure transmitter for level measurement
English version - 02/2018
Download
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 higher Conversion instructions Cerabar S PMC/PMP7x and Deltabar S
PMD/FMD7x from software version 1.x to software Version 2.x or higher
English version - 05/2021
Download
Short Instruction (KA)
Deltabar FMD71, FMD72 Brief Operating Instructions Electronic differential pressure transmitter for level measurement
English version - 02/2018
Download
Short Instruction (KA)
Cerabar S, Deltabar S, Deltapilot S - Exchange of the push buttons Cerabar S, Deltabar S, Deltapilot S - Exchange of the push buttons
English version - 05/2021
Download
Installation Instructions (EA)
Installation instruction - Ground terminal T14/T15/T17, F30/F31 Cerabar S, Deltabar S, Deltabar, Cerabar M, Deltabar M, Deltapilot M
English version - 06/2015
Download
Installation Instructions (EA)
Plug M12 Installation instructions Deltabar
English version - 08/2016
Download
Installation Instructions (EA)
Screw set Cerabar PMC51B, PMC71B
Cerabar M PMC51, Cerabar S PMC71
Deltabar FMD71
English version - 03/2020
Download
Installation Instructions (EA)
Terminal module Installation Instructions Cerabar S PMC71, PMP71, PMP75, Deltabar S FMD77, FMD78, PMD75, Deltabar
FMD71, FMD72, Deltapilot S FMB70
English version - 04/2017
Download
Installation Instructions (EA)
M12 plug for sensor FMD71/72 Deltabar FMD71, FMD72
English version - 03/2021
Download
Installation Instructions (EA)
M12 plug for transmitter Deltabar FMD71, FMD72
English version - 03/2021
Download
Installation Instructions (EA)
Transmitter electronics Installation instruction Deltabar
English version - 02/2014
Download
Installation Instructions (EA)
Sensor cover, sensor electronics Installation instruction Deltabar
English version - 02/2014
Download
Installation Instructions (EA)
Sensor FMD71, FMD72 and cables Installation instruction Deltabar
English version - 02/2014
Download
Installation Instructions (EA)
Process seal Cerabar PMC51B, PMC71B
Cerabar M PMC51, Cerabar S PMC71
Deltabar FMD71
English version - 10/2020
Download
Installation Instructions (EA)
Installation Instructions Gasket with metal ring for universal process adapter
Deltapilot M FMB50, Deltalpilot S FMB70, Deltabar FMD71, Deltabar S
FMD78, Cerabar M PMC51, Cerabar PMP23
English version - 03/2019
Download
Installation Instructions (EA)
Mounting kits for housing T14/T15/T17 Cerabar S PMC71, PMP71/75
Deltabar S PMD75, FMD77/78
Deltabar FMD71/72
Deltapilot S FMB70
English version - 03/2021
Download
Ex Safety Instruction (XA)
Deltabar FMD71, FMD72 4-20 mA HART
Ga/Gb Ex ia IIC T6...T4
1Ex d [ia] IIC T6...T4 Gb
English version - 05/2021
Download
Ex Safety Instruction (XA)
XA Deltabar FMD71, FMD72 4-20 mA HART
Ex db [ia] IIC T6...T3 Ga/Gb
English version - 03/2024
Download
Ex Safety Instruction (XA)
Deltabar FMD71, FMD72 4-20 mA HART
Ex db [ia] IIC T6...T4 Ga/Gb
Ex db [ia] IIC T6...T3 Ga/Gb
English version - 04/2022
Download
Ex Safety Instruction (XA)
Safety Instructions Deltabar FMD71 Control Drawing
CSA (XP)
English version - 10/2013
Download
Ex Safety Instruction (XA)
Deltabar FMD71, FMD72 IECEx: Ex ia IIC T6...T4 Ga/Gb Ex ia IIC T6...T3 Ga/Gb Safety Instructions Differential Pressure Transmitter
English version - 08/2018
Download

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Spare parts and accessories

Sealing
Sealing

Sealing set, cover, sensor, 5 pieces

Sealing
Sealing
Order code 71186149
Drawing number 23
further parts
further parts

Ground terminal T14/T15/T17, F30/F31

further parts
further parts
Order code 71290825
Housing/housing accessories
Housing/housing accessories

Push button housing, HART, version 2

Housing/housing accessories
Housing/housing accessories
Order code 52024110
Drawing number 13
Housing/housing accessories
Housing/housing accessories

Housing filter VA, EPDM, 1 piece

Housing/housing accessories
Housing/housing accessories
Order code 71111056
Drawing number 16
Spare parts and accessories
Deltabar FMD71 - Electronic differential pressure
Electronic dp - Deltabar FMD71

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Deltabar FMD71 - Electronic differential pressure
Electronic dp - Deltabar FMD71
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CAD Drawings
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Spare parts and accessories

Sealing
Sealing

Sealing set, cover, sensor, 5 pieces

Sealing
Sealing
Order code 71186149
Drawing number 23
further parts
further parts

Ground terminal T14/T15/T17, F30/F31

further parts
further parts
Order code 71290825
Housing/housing accessories
Housing/housing accessories

Push button housing, HART, version 2

Housing/housing accessories
Housing/housing accessories
Order code 52024110
Drawing number 13
Housing/housing accessories
Housing/housing accessories

Housing filter VA, EPDM, 1 piece

Housing/housing accessories
Housing/housing accessories
Order code 71111056
Drawing number 16
Spare parts and accessories