UWT application of the month
For the cellulose production of a wood manufacturing plant in South America, the guided wave radar was implemented in several water tank constructions within the maceration processes. The modern, high-quality TDR technology ensures a continuous production process of the plant. Uninfluenced by changing process conditions, TDR sensors detect the level reliably and precisely and thus offer optimum support for a smooth process flow.
+/-2 mm measuring accuracy & steam compensation
Innovative technologies combined with years of industry knowledge enabled UWT GmbH together with the local partner company VESET y Cia. Ltda. to provide a tailor-made solution with the guided wave radar sensor technology of NivoGuide® NG 8000. The low frequency ones are hardly damped even at high moisture content, so that the greatest possible amount of energy is available for the actual level determination. A reliable level determination for a trouble-free process flow is thus guaranteed at all times. For reliable level detection of the water from the heating of the logs in the drying system during maceration, the level is controlled via a pipe with a diameter of 100mm and a height of 600mm. The small diameter of the tube provides a signal bundling that amplifies the measuring signal, which further increases the measuring reliability. Even under these demanding process conditions, NivoGuide® with its 4...20 mA/HART two-wire electronics measures precisely to +-2mm accuracy. Due to the short reaction time even faster changing levels can be reliably detected.
Smart TDR with helpful diagnostic capabilities
The intelligent software of the guided wave radar sensor technology enables high system availability. Intelligent software algorithms can distinguish between dynamic and static signals. Thus, installations within the vessels can be identified as such and excluded during echo analysis. Faulty level measurements triggered by installations are excluded, minimising the deployment of service technicians and maximising plant availability. However, as failures cannot be excluded one hundred percent, echo curves are automatically recorded and saved.