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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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#2
01-08-2017, 01:21 PM
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we use something like this for our swimming pools in the surge tanks. the only thing I can say is you will have to run it in a tube or something because the laser can bounce off debris or items and cause and incorrect reading. I just use cheap float valves myself and never had an issue.
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150 gallon reef mostly softies/lps. 50 gal sump with bubble magnus skimmer/ Led fuge light/refugium/ 1200 return and tunze powerheads. Dual pharoah main tank led.4 pump dosser. 550 gallon stingray tank water drip system 150 bowfront. 75 turtle tank, many others
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#3
01-08-2017, 08:23 PM
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I ended up making my own.
Digikey has a decent article on it. I used it do design mine. http://www.digikey.ca/en/articles/te...nic-techniques
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Linear Mode
