一、原理:水位涨落是利用带有作导线用的弹簧式笔尖的浮标的升降和笔尖在固定高度的信号水力转筒接触发出不同信号来表示的。二、构造:1、信号水力转筒,直径为1公寸,其长度根据水位变幅的大小确定。转筒应用尽量轻金属制作。固定安装在一直主轴上,轴的底部装一适当大小(根据 First, the principle: Water level fluctuations are used with a spring-loaded nib for the buoy lift and the pen tip at a fixed height signal hydraulic drum contact issued a different signal to represent. Second, the structure: 1, signal hydraulic drum, a diameter of 1 inch, its length according to the size of water level amplitude determination. Drum applications as light metal production. Fixed installed on the spindle, the bottom of the shaft fitted with a suitable size (according to