This old indicator circuit indicates only when the fuel reaches the sensor level. The integrated circuit is not common today. The circuit was found in documentation from the 1980s.
This relay circuit was found in a 90s American documentation. The transformer windings are...
The indicated circuit is an intermittent one in which we use two 555 integrated ones, one as a low...
Found in documentation from the 1980s, this circuit uses an operational amplifier from that time....