The RD-200 Radar Velocity Meter is a patented product (Patent No.: ZL 2016 2 0622254.1) developed by Shenzhen Huaju Scientific Instruments Co., Ltd. This instrument features a K-band planar microstrip array antenna, which ensures concentrated energy and low power consumption. It integrates functions such as vertical angle compensation, flow velocity filtering algorithms, signal strength detection, RS485/RS232 communication, and wireless communication. The non-contact radar measurement method ensures that the results are unaffected by temperature or atmospheric pressure. The device is resistant to corrosion from sewage, unaffected by sediment, and minimally impacted by water damage. Its simple civil engineering requirements make it easy to install and maintain. The unique antenna design results in ultra-low power consumption, significantly reducing power supply demands. It is particularly suitable for installation in scenarios requiring long-term flow velocity monitoring.