Any experiences with measuring the water level in a well? My well is less than 5 Meters deep and 20 Meters from the house (no electricity available (yet, but who knows)
Any experiences with measuring the water level in a well? My well is less than 5 Meters deep and 20 Meters from the house (no electricity available (yet, but who knows)
If you want an accurate measurement, you can put a tube that exits below the lowest water level you expect. Put a pressure sensor like an MPX2102 and an aquarium pump on the tube. When you turn on the pump and it starts bubbling out the tube at the bottom, the pressure you measure on the sensor will be relative to the height of the water column above the tube opening. 1"wc is approximately 249.082 pascals or 0.0361263 psi
I use this method on my brewbot for measuring the amount of water in the kettles for strike and sparging. It’s accurate to within a 100mL or so, at least with the ADC I’m using on my controller. You might need a slightly different sensor depending on the over height of water column you plan to measure.
In that case, just a tube and a pressure sensor will do, no need to pump air. As the water level rises air pressure will build up in the tube. Mounting it in the well might be a challenge, but also an easy setup.
It is much more accurate if you use the pump. I tried just measuring the pressure in the tube from the water column, it was all over the board and the resolution sucked, probably 10X worse. Using the pump fixes that because you aren’t just measuring how much the water compresses the air, you’re measuring exactly what pressure it takes to push out the bottom, which is exactly the water column. It doesn’t take much of a pump if all you’re pressing against is a few feet of water. Something like this: https://www.aliexpress.com/item/1005009288427024.html
I’d just tie it to a heavy nut and drop it in the well. I probably wouldn’t even measure it, just calibrate on some known water levels and watch it for a while.