Quote:
Originally posted by Qwiv
You cannot do what you are discribing with a simple relay. You would need to creat a logic board to accomplish what you are discribing. Use the second floatswitch as a back-up.
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Actually this can be done with a simple relay and 2 float switches. Many of us a simple "latching" circuit to run our top-offs.
The circuit is called a "latching relay circuit" and does not need any type of logic or other components (maybe a diode to protect the relay coil from iductive spikes).
A search here or on google will provide you with plenty of examples. If you still need help let us know. (This question gets asked quite a bit)