Smart Non-contact Radar

Smart Non-contact Radar
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SmartLine Non-Contact Radar

Honeywell’s SmartLine Non-Contact Radar Level Meter measures distance, level, volume and mass. Based on FMCW (Frequency Modulated Continuous Wave) technology, it provides a more stable measurement than pulse radar and is well suited for agitated process conditions and the most demanding applications.

What Is It?

The SmartLine Non-Contact Radar Level Meter can measure the level of a wide range of liquid or granular products on a large variety of installations, including LPG and LNG. The level meter does not require calibration or commissioning when installed and can be applied in agitated process conditions and agitated vessels. The product is available in two versions; the RM70 has its electronics designed specifically for liquids, while the RM60 is meant for powders or granulates.

It offers:

  • ± 3 mm/ ± 0.04" standard accuracy
  • Operability up to a flange temperature of 200°C (390 °F) and 40 barg (580 psig)
  • Measuring range of up to 80 m (260 ft)
  • Reliable measurement in difficult and agitated process conditions.

How Does It Work?

Based on an FMCW radar signal, the level meter transmits a high frequency signal which increases linearly during the measurement phase. The signal is emitted, reflected on the measuring surface and received with a time delay, t (t=2d/c, where d is the distance to the product surface and c is the speed of light in the gas above the product). For further signal processing, the difference is calculated from the actual transmission frequency and the received frequency and is directly proportional to the distance.

The level meter comes with an optional second current output that can be used for displaying measurements such as volume. In addition, it offers a wide variety of open (horn) and closed (drop) antenna configurations that can easily be interchanged by the user.

What Problems Does It Solve?

SmartLine Non-Contact Wave Radar is used in applications where technologies such as capacitance, hydrostatic level or ultrasonic level measurements may have been used earlier. This level meter is immune to changes in conductivity, density, pressure, temperature and gives reliable measurements in agitated process conditions. The FMCW signal allows the level meter to be used in a wider application range than PTOF (Pulse Time of Flight)


  • Standard accuracy ±3 mm (±0.04 in)
  • Reliable measurement in difficult process conditions
  • Operates up to a flange temperature of 200°C (390°F) and 40 barg (580 psig)