Fast Response Radar Level Sensor R-FR

The R-FR pulse radar level sensor is the ideal solution for liquid level applications that require fast response in challenging environments with temperature variations, extreme temperatures, extreme dust, wind or acoustic noise.

  • Fast response 10-30 echoes per second
  • Measuring range up to 340 ft (103.6 m)
  • Non-contact continuous level measurement
  • Self-cleaning, maintenance free operation
  • Plug-and-play installation with simple calibration
  • Optional remote monitoring and support

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Continuous Level Measurement for Fast Response Applications

The R-FR pulse radar sensor from ABM is the ideal solution for level applications that require fast response. The sensor is suited for challenging applications with temperature variations, extreme temperatures, extreme dust, wind or acoustic noise. The radar sensor with fast protocol provides 10-30 updates per second.

The non-contact radar sensor provides continuous level measurement up to 340 ft (103.6 m) with 4-20 mA output standard and simple push-button calibration. The sensor can be factory configured for a variety of applications with 3 / 4-wire (RS232 or RS485) communication options, remote monitoring with the optional Cellular Gateway and multiple mounting options.



  • Wave profile on ships
  • Vessel trim optimization for fuel efficiency
  • Flood monitoring

High Performance, Maintenance Free Radar Sensor.

  • Self-adjusting sensor, automatically eliminates false echoes without user involvement
  • High resolution with short transmitted pulses ensures accuracy
  • Very narrow radiation beam enables installation close to tank walls
  • No influence from mounting, walls or internal obstructions on sensors performance
  • No influence from temperature, pressure or humidity on measurement
  • Teflon rod antenna resists material and moisture build-up
  • Non-contact and self-cleaning nature provides maintenance free operation

Technology Advantage

ABM’s smart, self-adjusting radar sensors continually monitor conditions in the environment and automatically adjust the transmitted energy and sensitivity to match the current tank conditions. This technique allows the receiver to detect only one echo from the measured media while all false echoes are pushed under the noise level and eliminated. The self-adjusting technique also gives the same amplitude of wanted echoes regardless of distance to the target. With one echo only, signal processing is very simple and the certainty of the measured echo being the target is 100%. This makes the ABM sensors very accurate and reliable.

Very narrow transmit pulses enable liquid interface detection, such as oil-water interface. The radar sensor has a very fast response, up to 20 updates per second, enabling control for fast moving applications (i.e. vehicles, boats, etc.). Very high dynamics enables detection of very low dielectric constant liquids (>2).

Operation is plug-and-play with ABM sensors. The self-adjusting nature means there is no need for mapping or profiling the environment or downloading several parameters. These signal process operations commonly used by other brands reduce the certainty in the measured materials level. ABM sensors are smart and automatically adapt without user involvement.

Measuring Range: Up to 340 feet (103.6 m)
Technology: Pulse radar
Frequency: 6.3 GHz or 5.8 GHz (outside North America), 26 GHz, dual frequency 6.3/26 GHz, or dual frequency 26/78 GHz. Application dependent
Calibration: Simple push-button calibration for configuration
Output: 4-20 mA out standard
Power: 12-30VDC (3-wire), 115VAC (4-wire) or 230VAC (4-wire) operation options
Communication: RS232 or RS485 optional
Remote Monitoring: Cellular Gateway for remote monitoring, control and 24/7 virtual support optional
Ambient Temperature: -40 to 140°F (-40 to 60°C)
Enclosure: Aluminum standard. SS316L optional
Protection Rating: NEMA 6 (IP68)
Antenna: Teflon rod or SS316L horn
Process Connection: 1.5″, 2” or 3″ NPT
Process Temperature: -40°F to 176°F (-40°C to 80°C)
Process Pressure: ≤ 5 Bar (72.5 psi)

Data Sheet: Fast Response Radar Level Sensor 3 / 4-wire

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