Radar sensors measure much more reliably than ultrasonic sensors. During the development of the new compact instrument series, the focus was also on simple installation and operation. All application parameters can now be set very quickly. Via the VEGA Tools app, also wirelessly with a smartphone or tablet.
Process and environmental influences
Due to their physical measuring principle, ultrasonic sensors are easily affected by ambient conditions: the transit time of sound, for example, is affected by variation of temperature (e.g. solar radiation), changing vapours or gasses affect the accuracy. Strong wind or rain, or even fog, can also damp the emitted sound waves and further restrict the measurement performance. Radar sensor performance is not affected by temperature, pressure or vacuum and remains able to deliver correct, reliable readings under all environmental conditions
Radar sensor performance is not affected by temperature, pressure or vacuum and remains able to deliver correct, reliable readings under all environmental conditions.
Dead zone and submersion
Due to process conditions, sensors are regularly flooded in some applications. To counteract this, ultrasonic sensors are often equipped with anti-submersion shields. However, these shields can also easily collect dirt and flotsam, which ultimately degrades their measurement reliability. Radar sensors have no dead zone (blanking distance) so they don’t need this protection, they function reliably, even when flooded.
Radar sensors enable reliable measurement right up to the sensor antenna itself, even when flooded.
Dirt and condensate
In many applications, sensors struggle with buildup. This applies especially to ultrasonic sensors: build up affects the reliability of the measurement signal and increases the dead zone. Optimized signal processing enables radar sensors to suppress interference caused by buildup on the antenna system.
Radar sensors are immune to the effects of dirt and buildup and do not have to be cleaned.
Reliability and accuracy
Thanks to the strong focusing of 80 GHz technology, the radar beam can be aimed at the measured medium with pinpoint accuracy. As a result, even narrow shafts or deposits on vessel walls or internals such as pipes
or pumps cannot generate interfering signals. In contrast to ultrasonic, no false signal suppression is necessary.
Radar sensors are highly suited for use in confined spaces and vessels with internal installations.