this post was submitted on 17 Jan 2026
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Similar story here. I would guess an ultrasonic sensor would be the most reliable solution for OP, since all the tech can be kept at the top of the well. The only minor question I have is whether echoes would be an issue in a well, but I think it's worth trying to find out! You can get inexpensive preassembled units that work with Zigbee/Tuya,
Edit: This is what I used as a cheap off-the-shelf solution - https://a.aliexpress.com/_mPR6XlJ
I have one in my sump pit and it seems to measure the level of water just fine.
You have ultrasonic level sensors for oil tanks so I reckon that it would work in a well.
I tried to make one, it had 4meter ranges and fell short
Maxbotix make robust ultrasonic sensors that range out to 6m, they have a 3/4" pipe fitting on the back for mounting them.
So with that you can get a few lengths of 3/4" pipe and an elbow and have an easy way of mounting it a little ways into your well.
A little on the expensive side but simple to use and easy to weatherproof.