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  • NerijusB commented on vina1991's instructable $1 AUTOMATIC WATER LEVEL CONTROLLER2 years ago

    Don't bother yourself and use for example stainless steel bolts minimum M8 and put hexagonal end inside the tank. It will have big area and more metal to disolve :) there is no maintenance free. Another way simply order plastic capacitive sensor from ebay or alli and use it. Or cheap way just put floating ball and microswitch :) or reed switch:)

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