The selection of sensors is one of the key technologies for long-term monitoring of reservoir dam leakage. The sensing principle, special packaging structure, technical characteristics and field application of the DB53 static pressure level sensor of Endress +Hauser are analyzed in detail. At the same time, the basis of the fieldbus technology Profibus2PA used by this fieldbus type intelligent instrument is introduced. The reliability and automation level of the Nanchengzi Reservoir automation system using intelligent fieldbus instruments are greatly improved, which will play an important role in dam safety and reservoir area dispatching decision-making. Keywords: liquid level meter; intelligent sensor; reservoir; automation systemöfieldbus
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