Smart ABCS includes two parallel plates placed into the measuring medium, provides potential on the two plates (usually are sine wave voltage), then measures the current between them: the sensor has two types two polar and four polar types. the self-cleaning function can be selected according to the use environment. it has stable data and reliable performance. The internal self-diagnosis function makes ensures accurate data. Its installation and calibration are easy, It can be widely used in a sewage plant, water plant, water station, surface water, industry and other applications.