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Continuous level measurement with non-contact radar

Free-radiating radar sensors can determine the level of a medium without contact. The so-called FMCW radar measurement method (Frequency Modulated Continous Wave) is used for this purpose. The transmitted signal is modulated between two known frequency values (NivoRadar® NivoRadar 76 … 84 GHz) and the difference between the transmitted signal and the echo signal is measured. This difference frequency is directly proportional to the transit time and thus to the distance. The level can then be calculated by adjusting the respective vessel height.

Free-radiating radar sensors are used in both bulk solids and liquid applications.

Overview of radar sensors for continuous level measurement

FAQ – NON-CONTACT RADAR LEVEL MEASUREMENT

› What is a non-contact radar level sensor?

A non-contact radar level sensor measures the level of bulk solids or liquids without coming into contact with the medium. It transmits electromagnetic waves, receives the reflected echo and calculates the current level from it. This enables wear-free, precise and low-maintenance level measurement.

› How does non-contact radar level measurement work?

Non-contact radar level measurement is based on the FMCW (Frequency Modulated Continuous Wave) measuring principle. The sensor continuously transmits electromagnetic waves with a defined frequency modulation. The sensor calculates the distance to the medium surface from the difference between the transmitted and reflected signals, and then determines the current level.

› When is a non-contact radar sensor suitable?

A non-contact radar sensor is suitable for continuous level measurement in silos, tanks and process vessels. It is the ideal solution when precise, low-maintenance and wear-free measurement of bulk solids or liquids is required.

› Which media can be measured with a non-contact radar sensor?

Non-contact radar sensors are suitable for a wide range of bulk solids and liquids. They reliably provide continuous measurement of powders, granules, pellets, grain, cement, plastics, chemicals, water, oils and many other media.

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