The CPR1X00 and CPR2X00 series radar level meters are 80GHz radar level meters using FMCW frequency modulated continuous wave technology. The radar emits a 76~81GHz high-frequency microwave signal with linear frequency modulation, which is emitted from the radar antenna. When the microwave signal encounters the surface of the measured medium, some of its energy is reflected back by the surface of the medium and received by the radar antenna.