Suggestions regarding water level in borewell

Using Arduino Project Guidance
1

I was manually measuring the depth of water in a borewell using "Deep Well Water Level Meter". Recently one of friend suggested to automate the process of water level detection. I saw in the internet about different sensors like water pressure sensor, etc. But I was thinking about some budget friendly way do it. I do not want high accuracy (0.5 Meter will be sufficient). One person suggested to drop several wires at different height and probe sequentially to get the water level. I have a non submersible gravity water pressure sensor but it may not be helpful in this. Any suggestion regarding this project will be helpful. Thanks in advance.
Note:

  • Depth of water level in the well may vary form 2m to 20m
  • Direct line of sight to the water level may not be available (due to cables, well curvature, etc.)
  • Arduino based sensors may be considered
2

A 'bubbler' is one option, essentially a tube, air pump and pressure sensor.
All the electronics and pressure senor stay dry and are positioned above ground level.

3

Ultrasonic pulse?

4

Need an unobstructed pipe to do ultrasonic based depth sounding.
The pros use a 'boom box' depth tester which uses audible rather than ultrasonic frequencies.

5

Can you give an upper limit on what you are willing to spend.

6

A Max of $20-25 given that I already have arduino and some other materials.

7

I don't know of any way of doing it in that price range.

8

Position the sensor above the water. Run a tube (non-compressible material) down to the bottom of the well. Pressure will be a direct measurement of water level.

9

Not sure how those testers work, are they based on finding the resonant frequency of the air column in the pipe?

10

Saw it being used on the 'H2o Mechanic' Youtube channel.
Looked old and used pulsed sound, maybe around 300Hz. It looked like a mini guitar practice combo amp with a control box in a suitcase.

11

I would assume they just measure the time for sound to bounce-back (in the ballpark of 3ms per meter).

At about 15 meters or more round-trip you should be able to hear the delay if you can make a sharp sound by tapping on the well casing, etc. Of course it doesn't matter if the delay is to short to hear but that's "proof of concept" (if the water level is low enough).

12

I found a method as mentioned in the link. Can this be used for a height of 20m? Please suggest.

13

Try it. It might work. Get some 2 wire 'bell cable' from a hardware store.
Potential issues are condensation causing false readings and the wire behaving as a radio antenna causing erratic readings.

14

Hello ronij

Take a view here to get some ideas.

15

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