The signal focusing of radar sensors is mainly determined by the transmission frequency and the diameter of the antenna. In practice, this means that if the transmission frequency is 3 times higher, the radar signals are focused 3 times better, i.e., with a narrower, more focused measuring beam. This means vessel internals, such as agitators and heating elements, or a mounting position close to the vessel wall, have a much smaller effect on the measuring result. Markedly smaller process ﬁttings are also possible with the new technology. Even when using smaller antennas they maintain very good signal focusing. To achieve a focusing of approx. 8°, a radar sensor with 26-GHz transmission frequency requires a DN 100 process ﬁtting. In contrast, an 80-GHz VEGAPULS 64
sensor requires only a 1½" thread connection to deliver the same focusing performance. And even with the smallest possible ﬁtting, ¾", it still only generates a beam angle of 14°. This makes the radar sensors particularly suitable for use on small vessels with small process ﬁttings, such as those found in processing systems made of glass.