ProScan-3 Continuous Radar Level Sensor Transmitter The ProScan®3 80 GHz high-frequency technology permits a significantly more precise transmission signal focus. This makes it easier to distinguish between actual level signals and interference signals, making the measurement more reliable coupled with a higher degree of accuracy. The new ProScan®3 series of compact instruments are ideally suited for more complex level applications. The 80 GHz radar signal is capable of penetrating through the top lid of a tank, eliminating the need for a bulkhead fitting, or having the sensor subject to the conditions inside the tank.