Round water tank level sensor

[Boots33]

@lawrence-helm The tank that I am monitoring is used primarily for garden watering and topping up the pool, so it does not really have a regular sort of use. We also live in an area of frequent rainfall so the tank can stay at 100% for weeks on end.

I can see that your idea would be a good addition to the sketch if the tank was to be used for general house duties where more frequent use would likely give a more meaningful result.

[Ritesh T]

Sorry for bumping up an old question but I’m in the same boat of requirement.

And to my surprise there are quite a few new sensors in town:

This one has 2 transducers instead of 1 therefore has less minimum detection distance as compared to JSN SR04T. It is also completely sealed and waterproof.

Ebay spam link removed by moderator

Before finalizing on this I had bought another one which was a waterproof modified version of HC-SR04 from here

Ebay spam link removed by moderator

The 1st one is much more rugged and waterproof as compared to the latter one.

[Boots33]

@ritesh-t If you have not already found it you may also benefit from the thread by @zboblamont which can be found here. It addresses some issues of unstable readings that were occurring when the water in the tank was at a lower level.

[zboblamont]

@boots33 To be fair that was specific to the SR04-2.0, the technology has moved on a bit since non-waterproof twin head devices were the standard, but I confess having discovered the error it verifies with the Class-D quality water meter on the house-side. I may have to recalibrate the Litres/mm but the tank shape is not uniform cross section.
@Ritesh-T All you can do is try the version you bought, but the original suffered badly inside a sealed tank where moisture was very high indeed, and housing it to protect the board may prove tricky. That was my reasoning for going with the parking sensor button type with remote board, plus the sensor is a snug fit in the end of 3/4" pipe/socket. The only recurring problem is condensation below -10c, perhaps your environment is different or have better luck with yours.

[CrankyCoder]

I made a sensor like this myself. i took a non-water proof one and drilled holes to match the sensor in some plexiglass. and sealed around it with silicone. This worked until florida tried to drowned me out and flooded my entire sensor housing lol

[zboblamont]

@crankycoder
Bad luck on the storm, presumably a weatherproof box lid/side drilled out per your plexiglass original was the next version?

[zboblamont]

@ritesh-t I presume you are aware the device you bought is 5v?
Not so sure of their claim that the reduced blind-spot of 2cm is down to dual diaphragms, the original dual from memory had the same 20cm blind-spot as the remote and also was 5v only.

[CrankyCoder]

@zboblamont actually it was more of a "not completed" type of thing. i didn't finish the connection between the bottom part that houses the sensor and the top cap. so it got knocked over and water soaked in. so i will be redoing it and will just complete it this time :)

[Christian W]

I have problems with the same sensor, the minimum or shortest measurement is 40 cm, and yet in its technical characteristics it says that the minimum is 20 cm.

Will we have to calibrate something?

Thank you

[greyy greyy]

interesting, i will buy same sensor too