因为具有节能的特点,太阳能热水器的使用越来越普遍.但是这种热水器上水的时候,是靠观察溢水管是否有水流出来,判断楼顶水箱是否聍满水.往往因为人不在现场,水满后不能及时关阀,有时甚至造成通霄长流水,浪费了水资源.对此,可用电子门铃作为水满信号器,方法是将门铃的按键开关拆除,在两接线头处,焊接两根不锈钢针,插在溢水管下端.这样当水箱水 Because of its energy-saving characteristics, the use of solar water heaters is becoming more and more common. However, when such water heaters are put on water, it is to observe whether there is water flow out of the overflow pipes and to determine whether the roof water tank is full of water. Often because people are not on site, water After closing, the valve can not be closed in time, sometimes even causing long-term flow of water and wasting water resources. In this regard, an electronic doorbell can be used as a water full signal device. The method is to remove the key switch of the doorbell and weld two wires at the two terminals. Stainless steel needle, inserted in the lower end of the overflow pipe. So when the tank water