GD-300s is a high-precision, low-power consumption radar level meter, which can be used for non-contact level measurement of surface water and underground pipeline networks. The device uses pulse coherent radar (PCR) technology and uses a 60G millimeter radar. Waves are used as carrier signals, and millimeter-level mea- surement accuracy is achieved through an optimized signal recognition algorithm. Full wave-elimination filter design makes the measurement results more accurate and stable. Compared with traditional pulse radar level gauges, it has higher measurement accuracy and lower Power consumption and ultra-small volume; it is not affected by temperature gradients, air pressure, water vapor, pollutants and sediments in the measurement, and has good stability and environmental adaptability.