Sump water level monitoring - Raspberry Pi Forums

hi,
during recent storm got idea create system monitor water levels in sump hole , alert me in event level reaches critical level.
hoping direction on few questions.
1. have recommendation build water sensor or should purchase? seems easy build, water closes gap between 2 wires , circuit complete....
2. have multiple levels alert me levels rise , fall. there advise share , monitoring array of sensors?

i'm knew hardware side of things , eager learn.
thanks.

i partially built water level sensor last year due lack of time(and rain did not finish it.
if plan have wires submerged in water bear in mind electrolysis occur , probes perish. if water comes when rains maybe last longer.

there 2 solutions
1. can generate alternating current electrolysis not kill wires. pass ac throught diode , aplyfi nand gate.

2. read solution electrodes/probes made graphite. old brushed electric motors seem cheap source. don't need ac generator

here simple schematic of spilled water detector. add schematic 1 later because can't find now.

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