Research on automatic water level detection technique and its application for open water-replenishing tank of central air conditioning

A technical scheme for automatic water level measurement, data processing and control of the water tank was proposed in this paper. This scheme was based on the study of the water level detection technique and the features of water replenishment tank of central air conditioning, such as chemical softness, corrosive, slightly turbidity and etc. The new schema has a good performance in practical application.