Monitoring filling level of liquid medium e.g. in heating oil tank has measuring and indicating system in tank or container or cistern detected from outside through tank wall

摘要

The monitoring method is carried out so that the filling level of the medium (16) is determined from outside through a tank wall (14) of the tank (12). The filling level signal is led further per radio across a radio transmission distance (F) to an evaluating and indicating unit (40). At least two independent sensors (22,23,24) are fixed outside on the tank wall (14). An electronic measuring signal is produced, which depends on the degree of covering of an assigned sensor surface with the medium.