摘要： 首先详细说明了对潮汐电站正确测量其库区和海侧水位的重要性，然后叙述了浙江江厦潮汐试验电站水位计选择的经过，介绍了基于格雷码的浮子式水位计的工作原理、优势及系统结构，最后介绍了项目的实施情况，供参考。

Abstract: The paper stressed the importance of water level monitoring of reservoir and of the sea. Then, it introduced the selection process for the water level gauge. Followed, the working principles, advantages and system results of the float-type level gauge based on Gray code were presented. At last, the implementation of the project was advanced for reference.