The radar level/liquid level gauge emits extremely short microwaves with very low power, which are transmitted and received through an antenna system. Radar waves travel at the speed of light. The running time can be converted into level signals through electronic components. A special time delay method can ensure stable and accurate measurement in an extremely short period of time. Even when there is false reflection, the latest microprocessing technology and software can accurately analyze the level echo. By inputting the size of the container, the distance above can be converted into a signal proportional to the material level. The instrument can be debugged empty. Applications in solid-state measurement can use high-frequency sensors in the K-band. Due to the excellent focusing effect of the signal, the installation inside the silo or the adhesion on the silo wall will not affect the measurement.