SW40-1型日記水位計
記錄時間：24小時
浮筒直徑：70mm或100mm
水位變幅：10m
誤      差：≤±2cm
用        途：主要用於地震預報，監測記錄地下水位變化過程.
 
Running time: 24 hours
Diameter of float: 70mm or 100mm
Stage fluctuation: 10m
Error: ≤±2cm
Application: It is used for records of the water level change process of the earthquake prediction and underground water