A underwater detector and a method for underwater detection

The invention at hand detection device comprising two direct current electrode and a plurality of measuring electrodes for sensing that the water and the electrical conductivity moves the other objects in more detail can is related to a water detection system and underwater detection method It relates. The invention two direct current electrode, a plurality of measuring electrodes, including control and measurement module for measuring the voltage at the plurality of measuring electrodes, the algae in the strong areas that noise is mixed with the water layer with a large difference region or the temperature and salinity It can accurately detect the presence of a moving object.