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Potentiometric level detection
Operating mode of the Potentiometric level measurement
The potentiometric measurement principle uses the alteration of the voltage amplification between the electrode rod and the metallic wall of the filled Tanks. In the medium an electric flow field is generated, based on the electric conductibility and the capacitive susceptance. The voltage ratio is proportional to the part of the sensor rod which is submerged in the liquid. As only the alteration of the tension is detected, the properties of the medium, especially its electric conductivity, have no influence on the measuring result. In addition, by means of a second, patent pending measuring method, the sensor determines the consistence of the medium in which the sensor rod is immersed. The evaluation of the resonance properties makes sure that foam is detected and qualified as such, and also that incorrect measurements due to adhering material are avoided reliably.
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Application examples for potentiometric level sensors from Anderson-Negele:- Ideal for adhesive and pasty as well as for foaming media
- Level monitoring in feed vessels
- Level measurement in storage tanks
- Level measurement for both vented and pressurized storage vessels
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