Fiul/wata lɛvɛl switch na impɔtant tin we dɛn kin yuz fɔ du difrɛn tin dɛn fɔ no di lɛvɛl we fiul ɔ wata de insay tank. I de wok bay we i de yuz wan flot mɛkanism we de go ɔp ɔ fɔdɔm wit di likwid lɛvɛl. We di flot rich wan lɛvul we dɛn dɔn disayd, i kin mek wan swich, ɛn i kin sɛn signal to wan kɔntrol sistem. Dɛn kin yuz dis signal fɔ bigin du tin dɛn lɛk fɔ stat pɔmp, fɔ stɔp valv, ɔ fɔ wɔn pɔsin we de wok wit am. Di lɛvɛl switch na tipikli mek frɔm matirial dɛn we de te fɔ tinap tranga wan ɛn i de insay difrɛn kayn dɛn, we inklud mɛkanikal, kapasitiv, ɛn ɔltrasɔnik, fɔ fit difrɛn kayn likwid ɛn tank saiz dɛn. I de ple impɔtant pat fɔ mek di wata nɔ bɔku ɛn fɔ mek shɔ se i de wok fayn fayn wan na di say dɛn we dɛn de mek industri, motoka, ɛn usay pipul dɛn de liv.