The RD-300s-mini Radar Water Level Meter is a high-precision, low-power consumption product designed for non-contact liquid level measurement in scenarios such as surface water and underground pipeline networks. This product employs Pulse Coherent Radar (PCR) technology, utilizing a 60G millimeter-wave radar as the carrier signal, and achieves millimeter-level measurement accuracy through an optimized signal recognition algorithm. This low-power, non-contact measurement technology ensures that the measurements are unaffected by environmental temperature, water vapor pressure, airborne dust, water contaminants, and sediment. The optimized wave-filtering design enhances the precision and stability of the measurement results. The mobile APP connects wirelessly via Bluetooth, facilitating on-site debugging and maintenance.