I need something to measure the level in a well. The well has
distilled water in it. Its about 30 feet deep and only 6" wide. I
would like something that I could just drop in, so I could take a
reading and then put the lid back on. Is there something out there for
me. Are there any devices that I could point and shoot to get the
distance (that would be perfect).
I have been instrumenting wells and water tanks for several decades.
You can select a wide variety of solutions. The major issues are
accuracy and frequency of measurements, and if there is anyother
equipment down the well. Any yes the cork and string could work,
though you might not be satisfied with the data quality.
Sonic probes can be problematic in wells because of the relatively
small diameter resulting in less that ideal accuraccy.
If you need measurements once in a while - as much as daily a steel
tape with weight and chalk is highly accurate. Alternately a low
voltage resistor probe with a calibrated and marked cable works
effectively. See the link below. There are other maufacturers. This
is the piece of equipment that well drillers, hydrologists, and
environmental scientists would typically use.
If you need frequent measurements then you might consider a stand
alone downhole data logger.
If you need to tie the data into a data automation process then you
get into the a different realm.... of PLC automation. Which is
Hope this helps
Best of luck
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