Quote
We ended up using a metal tape measure 50 FT long. It had a float on one
end and a weight on the other and went over the top of a bearing on a
shaft.  There was a pointer for reference.

The well was inside the basement of a house.  The person used it in a
closed loop to cool his house in the summer.

I have more details if anyone is interested.



I would love to see more info on this, if i may. On a similar project note i
have a old Sensus water meter attached to the well input, i have a hall
effect switch attached to the outside and i have been able to pulse a led
each time the meter spins. 50 spins = 1 US gallon. I have to figure a way to
count the pulses offline so to speak. I went this way as opposed to water
level in the well as i knew how deep it was and its a 3 feet diameter hand
dug well. The water table doesnt change here rapidly so i could buy myself a
few days.
Would it be possible to use a piece of metal such as a tape measure and
measure the resistance of a float attached to it. Less resistance would
equal more water in the well.

Paul




-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
Of 556RECON
Sent: 09 October 2007 16:19
To: Microcontroller discussion list - Public.
Subject: Re: [EE] Well Depth Monitor - Winter Project


Paul & Lynn Tyrer wrote:

>Have you considered a 1 -wire network. I guess what you could do is string
a
>load of temperature sensors and monitor the difference in temperature.
>Assuming though that the water would be a different temperature to the air
>in the well cavity. This could be connected to a PIC to monitor them and
>then download to a pc when connected. The 1 Wire run could easily do the
>distance.
>Hope this helps.
>
>Paul
>
>
We worked on a project such as this.
We found that without the air circulating in the well the air and water
temp. were the same at least 10 FT above the water.  But at that time we
used a digital water temp. thermometer for water temp. for fishing. it
would only read in whole numbers and not fractional degrees.

We ended up using a metal tape measure 50 FT long. It had a float on one
end and a weight on the other and went over the top of a bearing on a
shaft.  There was a pointer for reference.

The well was inside the basement of a house.  The person used it in a
closed loop to cool his house in the summer.

I have more details if anyone is interested.

Recon

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