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#1
01-08-2017, 03:56 AM
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Optical level switches
ANyone familiar with these? Or a better, less expensive option?
W.E. Anderson OLS Level Switch, the cheapest optical ones I could find. I would like to add a couple of these for fail safe shutoff for my RO tanks. Charles
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Where did my rum go?! Success in this hobby does not count how you spend your money, it counts how you spend your time. 
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