利用宁波地震台ZK03 井的原气氡观测系统，将P2000 型测氡仪应用于气氡连续观测试验，记录到较明显的潮汐现象且其波动幅度较大。功率谱估计结果显示，观测数据存在显著的固体潮效应。同时，与同井观测的动水位、同台观测的VS 垂直摆NS 向记录的潮汐波形进行对比，发现曲线变化趋势基本一致，每天都有两峰两谷，但存在约2h 的时间差。P2000 型测氡仪具有自动扣除本底污染的功能，其记录到的波形能更真实地反应地下流体中气氡浓度的动态变化过程，可应用于地震流体气氡的连续观测。

Ningbo Seismic Station applied the P2000 radon measuring instrument to continuous gas radon observation experiment in Well ZK03 in its gas radon observation system，and recorded obvious tidal phenomenon and larger wave amplitude． The power spectrum estimate shows that there are significant tidal effects in the data observed． We also compared the dynamic water levels of the same well observation and VS vertical pendulum NS record to the tidal waveform and found the consistency in the curve variations: Both have two peaks and two valleys with about 2 hours in difference． The instrument has the function of the automatic deduction of background pollution， and can better reflect the dynamic change of radon process in underground fluid． The conclusion can be applied to the continuous earthquake fluid gas radon observation．

中国地震局流体台网仪器优化改造项目( TC11R42G)