以往介绍的水位控制电路,大多采用导体作传感器的触头,故传感不稳定。使用一段时间后触头与液本会发生电化反应,并将触头腐蚀,使其电阻增大,最终导致控制器失灵。 本文向读者介绍一种新颖实用的液位数显控制模块HU99 Previously introduced water level control circuit, most of the conductor for the sensor contact, so the sensor is unstable. After using the contact for some time and the liquid will occur electrochemical reaction, and the contact corrosion, so that the resistance increases, eventually leading to the controller failure. This article introduces readers to a novel and practical level digital display control module HU99