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The basic principle and the method of detecting the sludge level have been presented,and the merits and demerits of different methods have been compared. The method of detecting by ultrasonic has been put forward based on characteristic and the need of measuring of sludge level.
The basic principle and the method of detecting the sludge level have been presented, and the merits and demerits of different methods have been compared. The method of detecting by ultrasonic has been put forward based on characteristic and the need of measuring of sludge level.