214 MountingVEGAPULS 63 • Modbus and Levelmaster protocol41364-EN-170711Fig. 12: AgitatorsThrough the action of filling, stirring and other processes in the vessel,compact foam can form on the product surface, damping the emittedsignals considerably.If foams are causing measurement errors, the biggest possible radarantennas, the electronics with increased sensitivity or low frequencyradar sensors (C band) should be used.As an alternative, sensors with guided microwave can be used. Theseare unaffected by foam generation and are best suited for such ap-plications.4.3 Measurement setup - PipesBy using a surge pipe in the vessel, the influence of vessel installa-tions and turbulence can be excluded. Under these prerequisites, themeasurement of products with low dielectric values (εr value ≤ 1.6) ispossible.Note the following illustrations and instructions for measurement in asurge pipe.Information:Measurement in a surge pipe is not recommended for extremelyadhesive products.Foam generationMeasurement in a surgepipe
