Endress+Hauser Micropilot FMR67B – 80 GHz Radar Level Sensor
The Micropilot FMR67B is a high-performance 80 GHz free-space radar level sensor developed for continuous, non-contact level measurement of bulk solids under demanding process conditions.
It combines a highly focused radar beam with a maximum measuring distance of 125 m, making it suitable for high silos, bunkers and stockpiles. The FMR67B is also designed for applications involving extreme process temperatures of up to 450 °C and process pressures up to 160 bar.
Long-Range Radar Measurement for High Silos
With a measuring distance of up to 125 m, the FMR67B is designed for applications where conventional level sensors may not provide sufficient range.
Its 80 GHz radar frequency produces a very narrow beam angle, helping concentrate the radar signal toward the material surface. This is particularly useful in tall or narrow vessels and in silos containing ladders, support structures or other internal installations.
Key Advantages
80 GHz W-band radar technology
±3 mm measurement accuracy
Up to 125 m measuring distance
Process temperature from -40 to +450 °C
Process pressure from vacuum to +160 bar
Very narrow beam angle
High beam focusing for vessels with internal fittings
Non-contact level measurement
Suitable for high silos, bunkers and stockpiles
PTFE flush/drip-off antenna and 316L horn antenna options
Heartbeat Verification and Monitoring
Bluetooth® commissioning and SmartBlue App
HART / PROFIBUS PA / PROFINET Ethernet-APL
SIL 2/3 according to IEC 61508, depending on configuration
International explosion protection options available
Built for Extreme Temperature Applications
One of the major differences between the FMR67B and standard bulk-solid radar sensors is its ability to operate in extreme process temperatures up to 450 °C.
This makes the FMR67B suitable for demanding solid-level measurement where elevated process temperatures would exceed the operating limits of many conventional radar instruments.
The instrument supports process temperatures from -40 to +450 °C, with process pressure capability from vacuum up to 160 bar, depending on the selected configuration.
Focused Beam for Difficult Vessel Geometry
Bulk solid vessels are often equipped with internal structures that can generate unwanted radar reflections.
The FMR67B uses 80 GHz technology and high beam focusing to direct the radar signal more precisely toward the product surface. Its very narrow beam angle makes it particularly suitable for narrow silos and vessels with many internal fittings.
This design is useful for applications where installation space is limited or where the sensor needs to operate reliably despite complex vessel geometry.
Reliable Measurement of Bulk Solids
The FMR67B is designed for continuous level measurement of powdery, granular and other bulk solid materials.
Its non-contact operating principle avoids mechanical contact with the measured material, while the focused radar signal supports measurement over long distances.
Typical applications include:
High storage silos
Bulk material bunkers
Stockpiles
Powder and granular material storage
High-temperature solid material processes
Vessels with internal structures
Long-range bulk solid level measurement
Advanced Commissioning and Diagnostics
The FMR67B includes digital functions designed to simplify commissioning, verification and maintenance.
Guided wizards help users perform commissioning and verification, while Bluetooth® connectivity and the SmartBlue App provide convenient access to device configuration and maintenance functions.
Heartbeat Technology can identify anomalies and support verification and condition monitoring, helping improve measurement reliability and maintenance planning.
Flexible Antenna and Communication Options
Depending on the application and configuration, the FMR67B is available with different antenna designs, including:
2" / 50 mm PTFE drip-off antenna
3" / 80 mm PTFE flush antenna
2.6" / 65 mm 316L horn antenna
Communication options include 2-wire HART, PROFIBUS PA and PROFINET with Ethernet-APL, with Bluetooth wireless technology available for commissioning, operation and maintenance.
Main Technical Parameters
Measurement principle: Free-space radar / Time-of-Flight
Application: Continuous level measurement of bulk solids
Frequency: W-band, approximately 80 GHz
Accuracy: ±3 mm
Maximum measuring distance: 125 m
Process temperature: -40 to +450 °C
Process pressure: Vacuum to +160 bar
Antenna options: PTFE flush, PTFE drip-off, 316L horn
Process connections: Flanges
Communication: HART, PROFIBUS PA, PROFINET Ethernet-APL
Wireless commissioning: Bluetooth® / SmartBlue
Functional safety: SIL 2/3 according to IEC 61508, depending on configuration
Explosion protection: International Ex approvals available
FAQ
What is the Micropilot FMR67B used for?
The FMR67B is designed for continuous, non-contact level measurement of bulk solids, especially in demanding applications involving long measuring distances, high silos or extreme process temperatures.
What is the maximum measuring range of the FMR67B?
The maximum measuring distance is 125 m, making it suitable for high silos, bunkers and stockpiles.
What is the accuracy of the FMR67B?
The specified measurement accuracy is ±3 mm.
Can the FMR67B operate at high temperatures?
Yes. Depending on the configuration, the FMR67B supports process temperatures from -40 to +450 °C.
Is the FMR67B suitable for narrow silos?
Yes. Its very narrow beam angle and high beam focusing make it particularly suitable for narrow silos and vessels containing internal fittings.
What materials can the FMR67B measure?
The FMR67B is intended for bulk solids, including powdery and granular materials. The exact application suitability depends on material properties, vessel geometry and installation conditions.
What communication protocols are available?
Depending on configuration, the FMR67B supports HART, PROFIBUS PA and PROFINET with Ethernet-APL, as well as optional Bluetooth wireless technology.
Is the FMR67B suitable for hazardous areas?
Yes. The FMR67B is available with international explosion protection certifications, depending on the selected configuration. SIL options are also available.
