Extremely short microwave impulse are emitted by the antenna system to the measured product, reflected by the product surface and received again by the antenna system. the time from emission to reception of the signals is proportional to the level in the vessel. A special time spreading procedure enables the reliable and precise measurement of the extremely short signal running times. The radar sensors are available in different C and K-band frequency ranges, this ensures the optimum solution for the different applications. The proven ECHOFOX signal processing analysis the refelections in the vessel based on long-standing experience and detects the level signal reliably.