Continuous level measurement UWT with the help of radar sensors
Radar level sensors ensures accurate and reliable continuous measurement of material levels in various containers and processes. The measurement principle is based on electromagnetic waves: the sensor emits a focused wave that is reflected from the surface of the material and returns to the sensor as an echo, where it is processed.
Operation of radar sensors based on electromagnetic waves. The sensor emits a focused signal that is reflected from the surface of the material and returns as an echo signal to the device, where it is processed and converted into a level value. This category includes both free-beam radars and guidance radars, also known as TDR or GWR sensors.
The fundamental difference between these technologies lies in the signal transmission. Free-beam radars use antennas that send waves in a non-contact manner towards the material, while guided radars transmit the signal through a probe – a rod or cable – that is in direct contact with the material.
Free-radiating radars are usually described by operating frequency, as it is this that determines accurate and reliable level measurement in various containers.
High-frequency technology allows for more compact sensors, narrower beam angles, and better reflection properties. For these reasons, UWT radar sensors works with modern 80 GHz technology, which guarantees extremely precise results.
Directional radars, on the other hand, can operate at a much lower frequency, around 1 GHz. This technology is particularly useful when the environment contains dust, sediment, foam, vapors or when the measured surface is unstable. In addition, these sensors are also suitable for determining phase boundaries (interfaces). An important part of them is the probe - depending on the application, you can choose a rod, cable, coated cable (PA) or coaxial version. This allows UWT for radar solutions adapt to various industrial needs and ensure accurate and reliable level measurement.
Continuous level measurement with non-contact radars
Non-contact radar sensors uses FMCW technology (76-84 GHz), which allows precise distance determination based on the difference in frequency between the transmitted and reflected signal. This allows the filling level to be calculated without direct contact with the material.
These radars are suitable for both liquids, both bulk materials for level measurement. They are reliable, resistant to dust, steam or temperature fluctuations and require no maintenance.
UWT 80 GHz radar sensors ensures a narrow beam angle and highly accurate results even in difficult conditions.
Due to their contactless operating principle, they are ideal for situations where:
accurate measurement even in the presence of dust, steam or temperature changes,
long service life without additional maintenance,
reliability in aggressive or hygienic environments.
Continuous level measurement with time-of-flight radar (TDR)
Directional Radar Sensors (TDR) uses pulse technology to accurately determine the level of material in containers. The electronics generate an electromagnetic wave that is transmitted down the surface of the probe. After reaching the surface of the material, part of the signal is reflected and returns back through the same probe. The resulting "echo signal" is measured by the propagation time, which directly indicates the distance to the material.
Fields of application
Directional radars are widely used in both liquids, both bulk materials for level measurement. Due to the probe design, they are extremely reliable in:
dust, foam or vapor,
for sticky deposits or moving surfaces,
complex procedural conditions.
UWT guidance radar sensors can be equipped with different types of probes (rod, cable, covered cable or coaxial) to adapt to each specific application. They are a reliable solution when stable and accurate level measurement is required without complicated maintenance.
UWT radar sensors provide reliable and accurate continuous level measurement in both liquid and bulk materials industries. Non-contact radars with 80 GHz FMCW technology are ideal for challenging conditions, while guided TDR radars offer advantages in dust, foam or unstable surfaces. A wide range of probes allows you to tailor the solution to various applications, ensuring long-term accuracy and minimal maintenance.
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