Function principle

The level sensors are integrated vertically into the tank to be monitored and are connected to an external evaluation unit by means of a cable. Within the hermetically pressure-resistant skid pipe, across its entire length, there is a board equipped with reed contacts and resistances. By means of the magnets integrated into the float, the reed contacts are activated, which, by means of the resistances, trigger a signal change on the lines of the fill level.

The voltage divider principle

The electronic components are set up in such a way that they switch in a controlled 2-3-2 sequence by means of a defined magnetic field. This produces a virtually linear output signal with high repetition accuracy and offers the advantage that, in the event of a single reed failing, the entire device will not fail, but there will be only a mismeasurement of one measurement step.

The float technology

The tried-and-tested, robust float technology allows the true level to be recorded, without the aid of extrapolated values from indirect measurements, such as pressure or echo, and independent of the temperature and air pressure fluctuations. Thus, secure, direct measurement is ensured, including in tanks with curved walls or where continuous, vertical accessibility is not possible.

The float technology makes it possible, as the only measurement principle, to record separating layers of two fluids in practically all tank sizes and shapes. Wherever two non-mixing media with a density difference of more than 0.1 g/ccm are to be measured, WEKA TLIs deliver the exact fill level of the separating layer.