Measuring Conductive and Highly Adhesive Media
Is there really some liquid left in the tank? Or is the wall just wetted by a thin film? Sensors based on the corTEC® technology by EBE recognize the situation in any case - also with highly conductive and adhesive media. Their strengths show when it comes to distinguishing volume and film and the compensation of external interferences.
Measuring Viscous and Highly Adhesive Media Based on the corTEC® Technology
With its corTEC® technology, EBE features a powerful sensor platform for level sensors. Especially in these applications, the integrated spectroscopic analysis can determine if a tank is really filled with water or if the tank wall is just wetted by a thin water film. In case of highly conductive or adhesive media, however, this process may reach its limits. For example, if certain physical effects are located in a frequency range outside the range of the system. Based on these effects, a film can be distinguished from a voluminous liquid. EBE has developed the corTEC® platform especially for this challenge.
With this technology, the system excites the measuring electrodes by a high frequency signal. It evaluates the transmission behavior. The signal frequency is so high that the parameters necessary to distinguish between liquid volumes and films become visible. Due to the measuring frequencies, users have to observe regulatory stipulations with respect to radiation. In addition, the system has to be protected against the coupling of interferences. For these reasons, corTEC® combines a broadband noise measurement technology with correlation signal processing. Due to the excitement of the electrodes by a broadband noise signal, the radiated performance density remains low. Furthermore, it is distributed across a wide frequency range. Due to the combination with processes from the correlation measuring technology, the sensors can now compensate the irradiation of external interferences. Further error sources, such as temperature drift and aging, can also be compensated.
Fields of Sensor Applications Based on the corTEC® Technology
This results in a robust and versatile process for level measurement in devices and systems operating with conductive liquids. EBE customers use the corTEC® platform for individual special tasks in level measurement in the following fields of application:
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