1　前言城镇高层建筑的生活和工作用水往往会因自来水的水压低而受影响 ,为此多数单位利用浮漂式机械水位控制器或电极式水位控制器控制电动水泵 ,将水从地面蓄水池抽到楼 (塔 )顶蓄水池 ,从而解决供水问题。但浮漂式机械水位控制器体积大、机械故障多、可靠性差 ,电极式水位控 1 Introduction Water for living and working in urban high-rise buildings tends to be affected by the low water pressure in tap water, for which most units use a floating mechanical water level controller or an electrode type water level controller to control the electric water pump to draw water from the surface water reservoir To the building (tower) top reservoir, in order to solve the water supply problem. However, the floating mechanical water level controller bulky, mechanical failure, poor reliability, electrode type water level control