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2021-10-20 7:04 pm
If you know the area and the sensor provided the pressure, you could calculate the height of the water (I think that's the equation Pressure=gravity * height). It would require a pressure sensor at the bottom of the tube.
That's not the correct formula. Look at the dimensions
Pressure has units lbs/square inch (PSI)
Gravity has dimensions feet/second/second
and Height has units ft
So gravity x height has units feet x feet/second/second or square feet/second/second.
The relation is 1 foot of water is .433 PSI or 1 PSI = 2.31 ft of water
You can derive this by considering that 1 cubic foot of water weights about 62.4 pounds, so if we divide length and width by 12 to get inches, then a stack of water 1' high and 1" squared at the bottom weights 62.4/12/12 = .433 lbs/sq inch.
Anything seems possible when you don't know what you're talking about.
2021-10-20 7:12 pm
LOL, wasn't taking a math test or trying to solve the problem...just making a casual suggestion.
Topic starter
2021-10-20 7:15 pm
To test it, stand the 4" pipe you have on a piece of smooth waste board or shingle or plate and apply enough hot glue to prevent the joint from leaking.
Drop the sensor down to the bottom of the pipe.
Pour a quart of water into the top of the pipe; take a reading from the sensor; use a yardstick to "dip" the water in the pipe.
I am an optimist and so will put together part of my testing environment that I have been accumulating stuff for. In the next few days I will be receiving a piece of 1" clear PVC, for all the testing I will be doing a dipstick will not due.
This image will give you an idea of what I am intending to initially construct. In the future all inputs and outputs of the tank will be simulated.
If it is determined that the Measuring Stack is no longer needed then in my testing environment the Measuring Stack will represent the Tank. 🙂
Also in the final outdoors implementation the 1" clear PVC will be incorporated for simple visual determination of water level. Yes of course, it will need to be appropriately covered, with a removable cover, to keep light out and so keep algae out.
2021-10-20 7:15 pm
I understand that, but I wanted to point out that it isn't the right formula. I also wanted to show what is the right relationship and illustrate how it is derived to help with later calculations.
I'm not grading you and there will be no pop-quiz as you leave 🙂
Anything seems possible when you don't know what you're talking about.
huckOhio reacted
Topic starter
2021-10-20 7:17 pm
Note the small metal cage used to keep the gauge upright, but off the bottom where bits of debris could effect the reading as show in the article.
I did not notice this so thanks for point out!
2021-10-20 7:26 pm
I am an optimist and so will put together part of my testing environment that I have been accumulating stuff for. In the next few days I will be receiving a piece of 1" clear PVC, for all the testing I will be doing a dipstick will not due.
This image will give you an idea of what I am intending to initially construct. In the future all inputs and outputs of the tank will be simulated.
That looks like the perfect testing setup !
Anything seems possible when you don't know what you're talking about.
Topic starter
2021-10-20 7:27 pm
My apologies if this is off track or has already been discussed (I haven't read this entire thread), but just looking at the above statement - could you use the calculation for a Water Column to determine the amount of water? If you know the area and the sensor provided the pressure, you could calculate the height of the water (I think that's the equation Pressure=gravity * height). It would require a pressure sensor at the bottom of the tube.
No apologies needed for not reading this entire thread, for sure I would not do especially since lots of time it is all over the place. Hopefully we get things to the point where the last few pages, or better single page, covers everything in great detail.
I believe somewhere in the back of my mind I remember seeing and planning to use the Water Column calculation you suggested. Thank You!
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