How to provide a level indicator for a vertical water storage tank?
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Please provide a sketch for this level indicator which should be easy to understand.
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Hi Ever, here's instructions about how to install an electronic (wireless) level indicator.
https://video.search.yahoo.com/search/video?fr=yset_widemail_chr_win&p=how+to+do+it+yourself+a+water+level
Here's many monitors available:
https://www.amazon.com/Water-Tank-Level-Monitor/s?page=1&rh=i%3Aaps%2Ck%3AWater%20Tank%20Level%20Monitor
Hope this is what you are asking!
Start by leveling your base for the storage tank. This usually done with gravel/sand with pavers or concrete blocks on top that are leveled.
Trying to answer again & sorry that the sensor suggestions won't work for you. I doubt you can get an accurate indicator of the water line unless you have a sensor internally in the tank. You may be able to get a "guesstimate" by using sound. Sort of like searching for a stud behind drywall.....use a hammer or tool to tap on the outside of the tank and as you tap up and down in a certain area you'll "hear" a difference in tone where the water is and isn't. That's the best I've got!
https://www.youtube.com/watch?v=WDu3CaBLXAM
http://www.rainharvest.co.za/2013/08/how-to-make-a-simple-water-tank-level-gauge/