Endress+Hauser Micropilot FMR62B – 80 GHz Radar Level Sensor for Demanding Applications

The Endress+Hauser Micropilot FMR62B is a premium 80 GHz free-space radar level sensor designed for continuous, non-contact level measurement in challenging liquid applications. It is particularly suitable for processes involving high temperatures, high pressure, aggressive media and changing process conditions.

With ±1 mm accuracy, an 80 m maximum measuring range, and process capability from –196 to +450°C and vacuum up to 160 bar, the FMR62B is designed for demanding process vessels where both measurement performance and safety are critical.

80 GHz Radar with ±1 mm Accuracy

The FMR62B operates in the W-band at approximately 80 GHz. Its high operating frequency produces a very narrow radar beam, helping focus the measurement signal on the product surface and reduce interference from structures inside the vessel.

Key measurement performance:

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  Measuring principle: Free-space radar
  
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  Frequency: W-band, approximately 80 GHz
  
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  Accuracy: ±1 mm
  
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  Maximum measuring distance: 80 m
  
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  Process temperature: –196 to +450°C
  
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  Process pressure: Vacuum to 160 bar
  
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  Ambient temperature: –40 to +85°C
  
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  Main wetted materials: 316L or PTFE-clad 316L flanges
  

Very Narrow Beam for Vessels with Internal Fittings

One of the FMR62B's most important advantages is its very narrow beam angle.

Many process vessels contain internal components such as pipes, heating coils, supports, agitators or other structures that can create unwanted radar echoes. The focused 80 GHz beam helps reduce the influence of these obstacles and improves measurement reliability.

This makes the FMR62B particularly suitable for:

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  Vessels with numerous internal fittings
  
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  Process reactors
  
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  Columns and process vessels
  
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  High-pressure tanks
  
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  Applications with limited installation space
  
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  Challenging liquid level measurement
  

Designed for Extreme Temperature and Pressure

The FMR62B is designed for significantly more demanding process conditions than standard radar level sensors.

Depending on the selected configuration, it can handle process temperatures from –196 to +450°C and pressures from vacuum up to 160 bar.

This broad operating envelope makes it suitable for applications such as:

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  High-temperature process vessels
  
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  High-pressure reactors
  
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  Steam-related processes
  
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  Petrochemical equipment
  
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  Chemical processing
  
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  Oil & gas applications
  
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  Cryogenic liquid applications
  

Reliable Measurement with Aggressive Media

The FMR62B is specifically characterized by Endress+Hauser as a premium device for continuous non-contact level measurement where aggressive media are used. Its available wetted materials include 316L and PTFE, with PTFE-clad flange configurations available.

Because radar measurement does not require direct contact with the liquid, the sensor can measure level without mechanical moving parts extending into the process.

This is particularly useful when the process medium is:

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  Chemically aggressive
  
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  Hot or cold
  
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  Under high pressure
  
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  Difficult to access
  
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  Subject to changing process conditions
  

Up to 80 m Measuring Range

The FMR62B supports a maximum measuring distance of 80 m, allowing it to cover large process vessels and storage applications.

The combination of:

80 GHz + 80 m range + ±1 mm accuracy

provides a strong solution for applications requiring both long-range measurement and high precision.

Advanced Signal Processing and Heartbeat Technology

The FMR62B incorporates Heartbeat Technology for process monitoring, verification and diagnostics during operation.

Its signal processing is designed to improve reliability in vessels with internal structures, while Heartbeat functions can help identify measurement anomalies and support verification without unnecessarily interrupting the process.

Key technologies include:

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  Heartbeat Technology
  
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  Multi-Echo Tracking
  
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  Smart diagnostics
  
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  HistoROM data management
  
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  RFID TAG for easy identification
  
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  Guided commissioning and verification
  

Smart Commissioning and Digital Operation

The FMR62B is designed to simplify commissioning and maintenance through guided device functions.

Available digital features include:

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  Bluetooth® commissioning
  
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  SmartBlue App
  
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  Guided commissioning wizards
  
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  Recommended troubleshooting actions
  
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  HistoROM data management
  
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  RFID identification
  

These functions can reduce commissioning effort and make device diagnostics easier during operation.

Safety for Critical Process Applications

The FMR62B was developed according to IEC 61508 and supports SIL 2/SIL 3 applications. Endress+Hauser also provides guided SIL locking, verification and proof-test concepts intended to reduce systematic errors.

Depending on configuration, available approvals include:

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  SIL 2 / SIL 3
  
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  WHG overfill protection
  
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  ATEX
  
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  IECEx
  
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  CSA C/US
  
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  EAC Ex
  
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  JPN Ex
  
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  KC Ex
  
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  INMETRO Ex
  
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  NEPSI Ex
  
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  UK Ex
  
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  Marine approvals
  

Flexible Industrial Communication

The FMR62B supports several communication technologies for integration into modern process control systems.

Communication options include:

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  4–20 mA HART
  
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  PROFIBUS PA
  
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  PROFINET with Ethernet-APL
  
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  Bluetooth® wireless technology
  

This allows the sensor to be integrated into both conventional instrumentation systems and newer Ethernet-APL-based architectures.

Typical Applications

The Micropilot FMR62B is particularly suitable for demanding liquid level measurement in:

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  Oil & Gas
  
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  Petrochemical
  
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  Chemical processing
  
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  Power generation
  
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  High-pressure process vessels
  
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  High-temperature applications
  
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  Aggressive liquid applications
  
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  Reactors and vessels with internal fittings
  
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  Large storage and process tanks
  

Its combination of 80 GHz radar, ±1 mm accuracy, 80 m range and extreme temperature/pressure capability makes the FMR62B one of the high-performance options in the Micropilot range.

Frequently Asked Questions

What is the Endress+Hauser Micropilot FMR62B used for?

The FMR62B is designed for continuous non-contact liquid level measurement in challenging process conditions, including aggressive media, high temperatures, high pressure and vessels with internal fittings.

What frequency does the FMR62B use?

The FMR62B uses W-band radar at approximately 80 GHz, providing a very narrow beam for focused level measurement.

What is the accuracy of FMR62B?

The specified measurement accuracy is ±1 mm.

What is the maximum measuring range?

The maximum measuring distance is 80 m.

What temperature can FMR62B handle?

Depending on configuration, the FMR62B supports process temperatures from –196 to +450°C.

What is the maximum process pressure?

The specified process pressure range extends from vacuum to 160 bar.

Is FMR62B suitable for aggressive liquids?

Yes. Endress+Hauser specifically positions the FMR62B for aggressive liquid applications, with 316L and PTFE available for wetted construction depending on configuration.

Can FMR62B be installed in vessels with internal structures?

Yes. Its very narrow 80 GHz radar beam is specifically advantageous for vessels containing many internal fittings.