目前,市场上常见的电子式水位控制器,其水位检测探头通的是微小的直流电(96-7《农村电工》上介绍的自制水位控制器也是如此),水处于直流电解状态,探头表面易形成一层氧化膜,由于氧化膜的非导电性,使探头失去检测传感作用,发生失控故障.LT—KY型水位控制器,采用了“水位控制专用电路”,检测水位的金属探头通以微小的交变电流,克服了直流电在水中易使金属探头因电解作用而腐蚀的不足,可大大延长探头使用寿命.现将“专用电路”原理介绍 At present, the common electronic water level controller on the market, the water level detection probe is through a small direct current (self-made water level controller introduced on the 96-7 “rural electrician” as well), water in the DC electrolysis state, the probe surface is easy The formation of a layer of oxide film, due to the non-conductivity of the oxide film, the probe lose the role of detection sensor, loss of control failure occurred. LT-KY-type water level controller, using a “water level control circuit” Small alternating current, to overcome the direct current in the water easy to make the metal probe corrosion due to electrolysis deficiencies, can greatly extend the life of the probe. Now the “special circuit” principle introduced