Endress+Hauser Micropilot FMR20B – 80 GHz Radar Level Sensor

The Micropilot FMR20B is a compact free-space radar level sensor designed for continuous, non-contact measurement of liquids and solids. Using 80 GHz radar technology, it provides accurate level measurement without direct contact with the process medium, making it suitable for a wide range of basic level measurement applications.

With a maximum measuring distance of 30 m, compact construction and guided commissioning, the FMR20B provides a practical solution for applications ranging from water and wastewater facilities to storage tanks, silos and bulk-solid stockpiles.

High-Accuracy Measurement with 80 GHz Radar

The FMR20B uses W-band radar technology at approximately 80 GHz, producing a focused radar beam that supports reliable non-contact level measurement.

The sensor is suitable for both liquid and solid applications, with different antenna sizes available depending on the required measuring distance and installation conditions.

Key performance:

• 
  Measuring principle: Free-space radar
  
• 
  Frequency: W-band, approximately 80 GHz
  
• 
  Maximum measurement distance: Up to 30 m
  
• 
  Accuracy for liquids: ±2 mm
  
• 
  Accuracy for solids: ±4 mm
  
• 
  Process temperature: –40 to +80 °C
  
• 
  Process pressure: –1 to +3 bar
  
• 
  Communication: 4–20 mA HART
  
• 
  Wireless communication: Bluetooth
  
• 
  Main wetted materials: PVDF, PBT/PC
  
• 
  Antenna options: 40 mm and 80 mm
  
• 
  Process connections: Threaded and flange options
  

Reliable Level Measurement Without Contact

Because the radar measurement principle does not require physical contact with the medium, the FMR20B is well suited to applications where contamination, buildup or difficult process conditions can make contact measurement less convenient.

The device can measure levels in open basins, channels, storage tanks, silos and stockpiles, covering both liquid and bulk-solid applications.

Easy Commissioning with Bluetooth

The FMR20B is designed to simplify installation and commissioning. Bluetooth wireless communication allows users to configure and maintain the instrument using the SmartBlue App, while guided wizards help lead users through important setup procedures.

This makes commissioning more straightforward, particularly where the instrument is installed in locations that are difficult to access directly.

Heartbeat Verification for Device Diagnostics

The FMR20B incorporates Heartbeat Technology, providing on-demand process verification and device diagnostics. This can help identify instrument conditions and support maintenance activities without interrupting normal measurement unnecessarily.

Suitable for Water, Wastewater and Industrial Applications

The FMR20B is positioned for applications across Water & Wastewater, Mining, Minerals & Metals, Food & Beverage, as well as utility applications in different industries.

Typical applications include:

• 
  Open basins
  
• 
  River monitoring
  
• 
  Sewer management
  
• 
  Pump and lift stations
  
• 
  Open-channel applications
  
• 
  Stormwater basins
  
• 
  IBC and storage tanks
  
• 
  Silos
  
• 
  Stockpiles
  
• 
  Pneumatic conveying
  

Compact Design for Flexible Installation

The compact housing allows the FMR20B to be installed in relatively narrow or space-constrained locations. Multiple antenna and process connection configurations are available, including 40 mm and 80 mm antennas and threaded or flange connections.

This flexibility makes the instrument easier to adapt to existing tanks, basins, silos and other measurement points.

Frequently Asked Questions

What is the Micropilot FMR20B used for?

The FMR20B is used for continuous non-contact level measurement of liquids and solids in applications such as basins, tanks, silos and stockpiles.

What is the maximum measuring distance of the FMR20B?

The maximum measuring distance is 30 m (98.4 ft) with the appropriate antenna configuration.

What is the accuracy of the FMR20B?

The specified accuracy is ±2 mm for liquids and ±4 mm for solids.

Does the FMR20B support Bluetooth?

Yes. The FMR20B supports Bluetooth wireless communication for commissioning, operation and maintenance through the SmartBlue App.

What communication output does the FMR20B use?

The FMR20B uses a 2-wire 4–20 mA HART interface, with Bluetooth available for wireless commissioning and maintenance.