Efficient level measurement and monitoring: precision and safety combined
Radar-based level measurement has become a key technology in many industries – from food and pharmaceuticals to chemicals and energy. Why? Because it is precise, reliable, and can be used even under difficult conditions. In this article, we explain how radar sensors work, what makes them so powerful, and in which applications they offer real added value.
Free-beam radar sensors
They operate contactlessly and use electromagnetic waves that are transmitted directly to the medium via special antennas. The frequency used is a key performance factor – it influences how precisely and reliably the fill level in process or storage containers can be measured.
High-frequency technology
Radar sensors with high frequencies, such as 80 GHz technology, can be designed compactly, have small beam angles of up to 3°, and excellent reflection properties. This enables them to deliver precise and reliable measurement results, even in complex tank geometries or in narrow shafts and pipes.
Typical applications
Ideal for liquids and bulk materials in silos, tanks and open containers, especially where non-contact measurements are preferred due to hygiene or process requirements.
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Guided radar sensors
With this technology, the high-frequency signal is transmitted directly to the medium via a guided probe – a rod or rope. The so-called TDR or GWR measurement is based on the principle of guided microwaves, in which the probe acts as a waveguide. Direct contact with the medium offers advantages in complex applications: Even in the presence of foam, steam, or weak reflections, the measurement delivers stable and precise values – ideal for demanding process conditions.
Low frequency technology
Guided radar sensors often operate at very low frequencies (e.g., 1 GHz), making them particularly insensitive to dust, buildup, foam, or vapor. This makes them ideal for applications involving moving surfaces or interface measurements.
Customizable probe types
Different variants such as rod probes, rope probes or coated probes (e.g. PA) allow flexible adaptation to specific process requirements.
Typical applications
They are particularly suitable for demanding process environments such as dusty silos or tanks with aggressive media.
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Advantages of Radar Technology
High Accuracy
Delivers precise results, even under extreme temperatures, pressure, or aggressive media.
Maintenance-Free
Non-contact measurement prevents wear and minimizes maintenance costs.
Contamination Resistant
Reliable even with dirt or deposits; no frequent cleaning needed.
Unaffected by Environment
Performs accurately in fog, rain, wind, vacuum, and high/low temperatures.
Easy to Use
Quick setup and configuration via tools like UWT LevelApp.
No Dead Zone
Measures reliably up to the antenna, even during flooding.
Focused Signal
80 GHz radar isolates measurements from interference in narrow or obstructed areas.
Versatile Applications
Suitable for solids, liquids, silos, tanks, and outdoor environments.