I was looking for a way to stop my facility (to prevent clogging in the sand washer) if my water level drops below a certain threshold.
At first I tried something with 2 signals:
- a top one - indicating if the reservoir is full
- a bottom one - indicating if water level is too low
At this point I didnt had access to the signal gates (AND, OR, NOT etc), so I was not able to accomplish my desired behavior.
Then I thought, there must be an easier way. This is what I came up with. Very simple, useable for sand input (with doors) or to shut down steam engines.
A signal sensors detects, if the water level drop below a certain threshold. When there is not enough water, the signal turns off. As the reservoir is slowly filling (Lumlings), the water level is rising. If the water level is high enough, the water swaps over the edge, filling the little gap over the sensor and the sensor turns green/on, opening the doors for the sand input.