SW40-1型日记水位计
记录时间：24小时
浮筒直径：70mm或100mm
水位变幅：10m
误      差：≤±2cm
用        途：主要用于地震预报，监测记录地下水位变化过程.
 
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